Java, detect whether a String beyond Long type value boundary
A lazy way can be to use BigInteger. BigInteger a = new BigInteger("188237574385834583453453635"); BigInteger b = BigInteger.valueOf(Long.MAX_VALUE); System.out.println("a > Long.MAX_VALUE is : " + (a.compareTo(b) > 0 ? "true" : "false")); If performance is important, you will have to test more solutions. @SotiriosDelimanolis idea is also a good one :...
What's the meaning of this “cast negative number to unsigned integer” idiom?
c#,casting,long-integer,unsigned,idioms
ulong is not supposed to store signed integral values. Because it does not use the last bit for storing sign value of your integer. You have to use unchecked keyword to use something like this which will get you a wrap around behavior for the value string a = aaa.ToString();...
Android pass long value to class View
android,class,view,calendar,long-integer
From Calendar Docs: https://docs.oracle.com/javase/7/docs/api/java/util/Calendar.html#setTimeInMillis(long) setTimeInMillis Takes a long not a Long private long data_ricevuta; public void setDataRicevuta(long data_ricevuta) { this.data_ricevuta = data_ricevuta; } public long get_data_ricevuta() { return data_ricevuta; } change your call mWeekView.setDataRicevuta(calendarioFooter.getTimeInMillis()); to mWeekView.setDataRicevuta(Calendar.getTimeInMillis()); if that works, which it should then your calendarioFooter is the wrong time.....
Java: Efficiently converting an array of longs to an array of bytes
java,arrays,type-conversion,long-integer,endianness
Concerning the efficiency, many details will, in fact, hardly make a difference. The hard disk is by far the slowest part involved here, and in the time that it takes to write a single byte to the disk, you could have converted thousands or even millions of bytes to longs....
How does int(or long long) overflow in c++ affect modulus?
c++,long-integer,modulus,integer-overflow
Many compilers offer a 128-bit integral type. For example, with g++ you can make a function static inline int64_t mulmod(int64_t x, int64_t y, int64_t m) { return ( (__int128_t)x * y) % m; } Aside: if you can, try to stick to unsigned integer types when you're doing modular arithmetic....
Convert a hex number in a varchar column to unsigned nteger?
Please find the below results it may help you. select conv('abcdef0123456789',16,10) from dual; +--------------------------------+ | conv('abcdef0123456789',16,10) |`Use the conv function` +--------------------------------+ | 12379813738877118345 | +--------------------------------+ ...
Reading 4 bytes of data as a Long with Python 2
python-2.7,bytearray,long-integer
import struct struct.unpack('>l', ''.join(ss)) I chose to interpret it as big-endian, you need to decide that yourself and use < instead if your data is little-endian. If possible, use unpack_from() to read the data directly from your file, instead of using an intermediate list-of-single-char-strings....
Storing dollar amounts in MySQL: INT vs LONG vs BIGINT
java,mysql,prepared-statement,long-integer,bigint
What is the difference between BIGINT and LONG on the MySQL level? java.sql.Types.BIGINT is defined as: The constant in the Java programming language, sometimes referred to as a type code, that identifies the generic SQL type BIGINT. Under Integer Types, the MySQL manual documents that its BIGINT datatype is...
Why don't loops take long as a valid type in its conditions?
java,loops,netbeans,long-integer
It is as easy as it looks like :) long l = 10000000000L; while (l < 10000000000000L) { } for (long k = 0; k < 10000000000000L; k++) { } ...
long loop counter appears to be very inefficient
java,performance,loops,for-loop,long-integer
This is how I might have written it public class IntLoopMain { public static long fib(int n) { long a = 0; long b = 1; for (long i = 0; i < n; ++i) { // note: loop counter of type long long c = a + b; a...
Converting bytes to a long: Why do some implementations bitwise-AND each byte with 0xff?
java,type-conversion,bit-manipulation,byte,long-integer
java's byte type is signed, so 0xff (255) == -1, during extending from byte to int/long - signed value is preserved, so if you just have code: final byte a = (byte)0xff; final long b = a; System.out.println(b); // output here is -1, not 255 so, here comes one trick:...
Can not convert long to long in Eclipse [closed]
Try long peopleOid = it.next().longValue() (documentation)....
What's wrong with the following arithmetic operation? C++ [duplicate]
c++,codeblocks,long-integer,division
If Population_A is in the range -16 .. 16, the integer multiply and divide will result in 0. If you want floating point division results rather than converting integer values to floats, change 6 to 6.0F and 3 to 3.0F....
the usage of the long double
If you are using the version of Code::Blocks with mingw, see this answer: Conversion specifier of long double in C mingw ... printf does not support the 'long double' type. Some more supporting documentation for it. http://bytes.com/topic/c/answers/135253-printing-long-double-type-via-printf-mingw-g-3-2-3-a If you went straight from float to long double, you may try just...
Trouble setting long value in singleton IOS
Just a guess: In loadInstance() you read the values from the file, so if there is a file you won't get in the init() where you set the values. To be sure there is no gamedata-file you should reset the simulator oder delete the app from the device and try...
Cast double to unsigned long C++
c++,casting,double,long-integer,unsigned
The problem arises with your variable distFromPlanets which resolves to -2.7e+9, as distEarthToSun = 9.3e+7 and newSunDist = 2.8e+9. Therefore 9.3e+7 - 2.8e+9 does approximately equal -2.8e+9. I'm no astronomer, but if you change your if statement to read if(selection <= 'a' || selection > 'h') the calculation for Neptune...
Safely and properly set a progressbar's maximum with a long in Java
java,int,progress-bar,long-integer
You could set the maximum length of your progress bar to 100, then calculate a divisor as follows: long divisor = totalSize / 100; Then each time you want to update the progress bar, simply: int progressAmount = (int)(amountCopied / divisor); ...
Conversion from String to long array and back doesn't work
java,string,encoding,base64,long-integer
In your long2str method, change: String s = Arrays.toString(chArray); to: String s = new String(chArray); When you use Arrays.toString() you are getting a String of the form [Y, W, J, j, Z, G, V, m, Z, 2, h, ...], which is not a valid base 64 String. To get the...
C++ unsigned long doesn't wrap around after 4294967295
c++,visual-c++,integer,g++,long-integer
if i start a unsigned long with 4294967295 ( his max allowed value ) 4294967295 is only the maximum value for unsigned long if unsigned long is a 32-bit type. This is the case on Windows, both 32-bit and 64-bit. On Linux, unsigned long is a 32-bit type on...
long data - remove all rows when first value for each person =X R
You may use df[as.logical(with(df, ave(string, id, FUN= function(x) x[1] < 65))),] Or using data.table library(data.table) setDT(df)[, .SD[string[1L] <65] , id] ...
transform a dataframe from long to wide in r, but needs date transformation
Try data$id <- with(data, ave(seq_along(NUMBER), NUMBER, FUN=seq_along)) reshape(data, idvar=c('NUMBER', 'Gender'), timevar='id', direction='wide') If you want the Date.Tested variable to be included in the 'idvar' and you need only the 1st value for the group ('NUMBER' or 'GENDER') data$Date.Tested <- with(data, ave(Date.Tested, NUMBER, FUN=function(x) head(x,1))) reshape(data, idvar=c('NUMBER', 'Gender', 'Date.Tested'), timevar='id', direction='wide')...
Printing Long values with toString in Java
Try to fix the constructor: public LinkedLargeInteger(long largeLong) { String s = Long.toString(largeLong); head = new Node(); tail = head; size = 0; for (int i = 0; i < s.length(); i++) { // You were putting the whole number, not the digits tail.next = new Node(Long.parseLong(String.valueOf(s.charAt(i))), null); // <<==...
Converting from a char to a long
java,arrays,long-integer,biginteger
The only real difference between a char and a long is the data size. A char is typically 1 byte, while a long is typically 8 bytes. When you convert a long to a string, you are creating an array of ASCII characters that would represent this number. For example,...
How to handle a 32 digits numeric in Java and PostgreSQL?
java,postgresql,long-integer,numeric
In case of Oracle/PostgreSQL the corresponding type to NUMBER/NUMERIC is Java's BigDecimal. The both types have the same internal representation (number stored as decimal digits). So you do not face any problems with rounding errors and also casting between them should be faster. It is big misunderstanding that many Java...
Read long integers from txt in java
The thing is that numbers like 2.2278e+08, 1.2339e+09 and 6.1868e+08 are in floating-point notation and therefore cannot be parsed as long numbers directly. However you could parse them as double values doing something like long l = Double.valueOf("2.2278e+08").longValue(); Of course this departs from the assumption that you know that all...
Intellij long “integer value is too big” but in range of long.maxvalue
intellij-idea,javac,long-integer
You must have Long literals in Java ending with an L, adding an L to your integer will correct your issue, like so: Long s = 9223372036854775806L This is because by default Java interprets all integers as 32-bit (int), the suffix L ensures that your integer is interpreted as 64-bit....
PHP SoapClient: Object passed is received as NULL in Java
java,php,wsdl,long-integer,soap-client
Try passing in a SOAP_ENC_OBJECT $struct = new stdClass(); $struct->item1 = $item1; $response = $client->RetrieveUserGPSDataVisualization(new SoapVar($struct, SOAP_ENC_OBJECT)); ...
C++ winapi LONG to std double
c++,winapi,double,long-integer
You don't need to cast from LONG to double. You can simply write: cursor[0] = cPos.x; cursor[1] = cPos.y; ...
Java BigInteger testBit 64-bit long
java,binary,long-integer,biginteger
You are counting the bits wrong: public void test() { long value = 0x4000863; //This value is actually read from a file long bigger = 0x8000000000000000L; BigInteger test = new BigInteger(Long.toString(value)); System.out.println("L:" + Long.toBinaryString(value) + "\r\nB:" + test.toString(2) + "\r\nB63:" + test.testBit(63)); test = new BigInteger(Long.toString(bigger)); System.out.println("L:" + Long.toBinaryString(bigger) +...
different values for NSNumber long in Objective-C
objective-c,long-integer,nsnumber
When you compare NSNumber to other objects, you have two options that do different things: You can use == to check if two objects represent the same exact object instance, or You can use isEqual: method to check if two objects represent the same value. In your case the safest...
Error casting to float, then int in python
python,casting,floating-point,int,long-integer
It appears that what is happening is that the list comprehension is polluting your namespace. eg. k = 0 [k for k in range(10)] After executing the above code in python 2.x the value of k will be 9 (the last value that was produced by range(10)). I'll simplify your...
How to append L to variable name
If you only multiply two ints you should cast them to long before multiplying. long l2 = ((long) l) * ((long) l). If l is already a long (as in your case) you do not have to cast. Integers larger than Long.MAX_VALUE can be handled with BigInteger. You can not...
When to use `short` over `int`?
(See Eric's answer for more detailed explanation) Notes: Generally, int is set to the 'natural size' - the integer form that the hardware handles most efficiently When using short in an array or in arithmetic operations, the short integer is converted into int, and so this can introduce a hit...
C get numeric value from part of string
c,string,int,long-integer,strtol
We give the algorithm, you write the code. Agree? OK, so the logic should be create an array of chars based on the end-start+1 index range. do a memcpy() from the source to the new array fro the end-start size. null-terminate the array. use strtol() to convert the array to...
Converting Float to Long gives negative value
c#,floating-point,type-conversion,long-integer
As M.kazem suggested in the comment, it was resulting in an overflow and as per C# specification compiler was silently ignoring it Console.WriteLine("float to long casting: {0}",(long)f); But if we convert above under checked then an overflow expression is thrown. checked { Console.WriteLine("float to long casting: {0}",(long)f); } ...
Thymeleaf HTML5 long variable issue
html5,spring-boot,long-integer,thymeleaf
It depends on your model. If there is 0 and this is the default for long this will shown in the view. If the ordernumber can be null or empty you should use Long. This is only an assumption. To give you a detailed answer you must provide more information.
Using numpy shape output in logic
python,numpy,int,long-integer,shape
The problematic line is a = np.reshape(a, (1, np.shape(a))). To add an axis to the front of a I'd suggest using: a = a[np.newaxis, ...] print a.shape # (1, 4) or None does the same thing as np.newaxis....
Newton's binomial - doesn't work for bigger numbers
c++,long-integer,binomial-coefficients
Factorial grows really fast and even unsigned 64-bit integers overflow n! for n>20. The overflow free way to implement the binomial coefficient is to use this recursive definition: binom(n, k) = binom(n-1, k-1) + binom(n-1, k) This ensures that you get an overflow only when binom(n,k) is too large to...
parse String date to long java
string,parsing,date,long-integer
Use the Formatter to parse the date: DateFormat df = new SimpleDateFormat("dd/MM/yyy"); Long date = df.parse("12/12/2014").getTime(); ...
ORA-01406: fetched column value was truncated - error reading a LONG RAW in Oracle
oracle,spring-batch,long-integer,truncated
After much research and trials, I ended up retrieving the LONG RAW data type as a byte[]. Following is the relevant code that I wrote to retrieve the data public byte[] getALongRawText(final SomeObject someObject) { byte[] result = myJdbcTemplate.query(getALongRawTextSql, new PreparedStatementSetter() { @Override public void setValues(PreparedStatement preparedStatement) throws SQLException {...
What is meant by the most restrictive type in C?
c,architecture,malloc,long-integer,memory-alignment
CPUs often require that (or work more efficiently if) certain types of data are stored at addresses that are a multiple of some (power-of-two) value. This value is called the alignment of the data. For example, a CPU might require that four-byte integers be stored at addresses that are a...
How to force long to be 4 byte
c++,arrays,int,long-integer,sizeof
You can't force the built-in long int type to be 4 bytes long on LP64 platforms (or stranger platforms, for that matter). However, you can use the types in <stdint.h> to guarantee the exact size of your variables. In your case you'll want either int32_t or uint32_t as your type,...
A random long is always the min value
The problem is that your long value is overflowing. Because Long.MIN_VALUE is negative for a signed long, Long.MAX_VALUE-Long.MIN_VALUE is larger than Long.MAX_VALUE and therefore doesn't fit in the long during the intermediate computations. Try using nextLong instead: public static long randomLong() { Random ran = new Random(); return ran.nextLong(); }...
What doe this C code do with (unsigned) and (long) cast [duplicate]
!! negates a boolean expression twice, essentially converting an expressions value to 0 or 1. As in C all values other than zero mean true, and zero means false, !! can be used to convert it into 0 or 1, in the case you need to use it later in...
In which type of variable store time in millis? Choosing a correct data type
java,types,calendar,long-integer
instead of comparing hours after converting it into milliseconds you can use Date::before or Date::after methods after setting your time into two separate Date objects. Date date1 = new Date(); // set time for first hour. Date date2 = new Date(); // set time for second hour. You can use...
Possible lossy conversion from long to int, JAVA
java,int,type-conversion,long-integer
Array dimensions can only be int types. The compiler is expecting that type but you are passing in a long type. You could change the argument type being passed in to an int and the make the corresponding changes. For completeness, here is what the JLS says about variables in...
Java how to remove last numbers of a long?
If you want to REMOVE the digits, divide by 10^n: long x = 1234567890L; long removeLastNDigits(long x, long n) { return x / Math.pow(10, n); } removeLastNDigits(x, 3) == 1234567L; As pointed out by dasblinkenlight, if you want to 0 the last n digits then after removing them you need...
JSpinner with long values
As @Aru mentioned, you can do it with the SpinnerNumberModel: Long val = Long.MAX_VALUE;//set your own value, I used to check if it works Long min = Long.MIN_VALUE; Long max = Long.MAX_VALUE; Long step = 1L; SpinnerNumberModel model = new SpinnerNumberModel(val, min, max, step); JSpinner spinner = new JSpinner(model); Note...
inserted type does not match in NSMutableArray
objective-c,int,long-integer,nsinteger
7205759403792935 is more than 32 bits. The value is -1 as a 56 bit integer.
Why does long long in c++ does not hold 2500^3 [duplicate]
The long long can definitely hold this value. The problem is that the expression that you are using to compute it, i.e. 2501*2501*2501, is an int expression. The compiler computes the result using integers. This causes an overflow, because the result does not fit in 32 bits. Hence the result...
In Swift, how do you convert a String to Int64?
xcode,string,swift,long-integer,int64
(From my above comment:) If you compile as a 64-bit app then Int is a 64-bit integer.
TreeSet custom comparator with long values
The magnitude of the difference is not important, simply that there is a difference. long a0long = a0.getID(); long a1long = a1.getID(); if (a0long < a1long) { return -1; } return a0long == a1long ? 0 : 1; ...
Strange bug with Catalan number generator
java,numbers,generator,long-integer
Based on this code A[i] is equal to Factorial(i). When n=11, you calculate Factorial up to 22, and Factorial(22) is larger than the max value of long, so your calculations overflow, and the result is wrong. You can avoid the overflow is you realize that: (Array[count] / (Array[n]*Array[n])) / (n+1)...
Recursive function to calculate combination and factorial
The maximum value of long in java is 2^63. That will safely take you up to the factorial of 20. However, factorial of 21 comes to around 2^65, so you are exceeding the maximum value that can be represented. See this question for a discussion about what happens in java...
Understanding long division algorithm
I've made a new version of the algorithm's expanation to answer to the comments. New version As input we have a 64bit integer v represented as a string of decimal digits. We need to pack it into the two's complement format. The result has two parts h and l (high...
Bug (??) in formatting long values with CString::Format
c++,format,long-integer,c-strings
If this is MFC, it should be like this: CString cstr; cstr.Format("SELECT 123=%ld, 456=%ld AND type = '%s' ", 123, 456, "'type'"); It's like printf. ...
Multiplying int with long result c#
c#,.net-3.5,int,long-integer,multiplying
Where does this minus from? From the integer overflow. Note that your code is equivalent to: int a = 256 * 1024 * 1024; int b = 8; int tmp = b * a; long c = tmp; Console.WriteLine(c); I've separated out the multiplication from the assignment to the...
Node JS very long process issue
node.js,process,exec,long-integer
Your question is basically this: You want to execute a system command via node, and capture the standard output. The best way to do that is using the child_process module: var sys = require('sys') var exec = require('child_process').exec; exec('node sample.js -mobile production', function(err, stdout, stderr) { console.log('Process finished executing!'); console.log('err:',...
Why I can't store/retrieve 11 digit long number properly
TL;DR --> Please use appropriate format specifiers and always check for the limit of the value that can be held by the used data type. In your code, scanf("%d",&student.id); %d is not the correct format specifier for long int. For long int it should be %ld For unsigned long int...
HashCode calculation from double
java,double,override,long-integer,hashcode
The double value is 64 bits wide but the int returned by hash method has only 32 bit. In order to achieve a better distribution of hash values (compared to simply striping the upper 32 bits). The code uses XOR to incorporate the upper 32 bits (containing sign, exponent and...
Recover long from int after precision loss
algorithm,casting,int,type-conversion,long-integer
One simply cannot get the value back when already casted from long to int. When you are casting from long to int, you are losing some bits. So, you just can't get back those bits and can't get back your lost long value by using a generic algorithm. In a...
Finding a C# equivalent (that specifies a base parameter) to strtol
c#,converter,long-integer,strtol
You just need to add the base parameter to your call. long value = Convert.ToInt64(stringVal, base); where base is the base of the number....
Converting long to int gives 0
java,int,type-conversion,long-integer
Casting a long to an int is done by removing the top 32 bits of the long. If the long value is larger than Integer.MAX_VALUE (2147483647) or smaller than Integer.MIN_VALUE (-2147483648), the net effect is that you lose significant bits, and the result is "rubbish". Having said that, the code...
Operations on long numbers in R
r,long-integer,biginteger,bigdecimal
All your problems can be solved with Rmpfr most likely which allows you to use all of the functions returned by getGroupMembers("Math") with arbitrary accuracy. Vignette: http://cran.r-project.org/web/packages/Rmpfr/vignettes/Rmpfr-pkg.pdf Simple example of what it can do: test <- mpfr(rnorm(100,mean=0,sd=.0001), 240) Reduce("*", test) I don't THINK it has hypergeometric functions though......
What is the error in multiplication of long long Integer?
100000000 with 8 zeros or 1000000000 with 9 zeros fit into an 32bit int (long, not long long), and that´s the default. Then the multiplications are made with 32bit int´s, and then the result gets converted to 64bit. This is a problem because the result won´t fit into 32bit =>...
Project Euler #8 in java
Your code makes a cast to long too late: by the time the cast is performed, the multiplication has been completed in 32-bit integers, predictably causing an overflow. Change the code as follows to fix the problem: // newSum should be called newProd, because you use multiplication, not addition newSum=...
Got “Boolean” expected “LongInt” pascal
boolean,pascal,long-integer,bubble-sort,insertion-sort
In Pascal, boolean operators and and or have higher precedence than the comparison operators >, =, etc. So in the expression: while j > 0 and A[j] > key do Given that and has higher precedence, Pascal sees this as: while (j > (0 and A[j])) > key do 0...
Why does anybody ever use int data type?
c++,types,int,long-integer,short
According to the standard (C++11, §3.9.1/2), Plain ints have the natural size suggested by the architecture of the execution environment; the other signed integer types are provided to meet special needs. So int is the type you should use unless you have a good reason to use any other type,...
Populate javafx tablecolumn with object method call type long
methods,javafx,long-integer,tablecolumn
You can use a ReadOnlyLongWrapper, which implements ObservableValue<Number> as required.
Long in C# won't fit the same value as Long in Java
long.MaxValue = 9223372036854775807 your value 1 = 18374686479671623680 your value 2 = 9259542123273814144 Your values are bigger than the signed long can hold. This is why you have to use unsigned....
Kibana3: long to IP in terms panel
long-integer,logstash,kibana,ipv4
This is because 'ip' is stored internally as a number. In order to have a string version of the ip address, you need to add it to the mapping and then use ip.raw in your panel: "MY_FIELD" : { "index" : "analyzed", "type" : "ip", "fields" : { "raw" :...
How to create a 64 bit Unique Integer in Java?
java,random,64bit,long-integer,uuid
If you need the numbers to be unique in one process, robust between restarts, you can use a simple AtomicLong and a timer. private static final AtomicLong TS = new AtomicLong(); public static long getUniqueTimestamp() { long micros = System.currentTimeMillis() * 1000; for ( ; ; ) { long value...
Creating a for loop that reduces long intergers to a number between 0 and 101
java,loops,for-loop,integer,long-integer
Something like this: public class Test { public static long getNumber(long input) { while(input > 101) { input = input /10; } return input; } public static void main(String[] args){ System.out.println(getNumber(101111)); System.out.println(getNumber(89123)); } } ...
Should I Stick to 32bit or 64bit Types for Fixed-Point Number Class?
c#,int,32bit-64bit,long-integer,fixed-point
The type you use is irrelevant, with regards to the platform, as types are types are types, in C#. In other words, a long is always 64 bits, no matter what platform you're on. It's a guarantee of C#. However, the real problem is going to be precision and scale.....
How to use 128 bit integers in Cython
c,gcc,cython,long-integer,int128
EDIT: this is NOT a workaround anymore, this is the right way to do it. Refer also to @IanH's answer. Now, the problem you have is that cython does not recognize your type, while gcc does. So we can try to trick cython. File helloworld.pyx: cdef extern from "header_int128.h": #...
Filling a long int array with random numbers
c,arrays,random,long-integer,gnupg
gcry_randomize fills a buffer with random bytes. So, what you might get is 4 or 8 random bytes, depending on your architecture. You can do this when you do unsigned long int random_numbers[64]; for(index = 0; index < 64; index++) { gcry_randomize(&random_numbers[index], sizeof(random_numbers[index]), GCRY_STRONG_RANDOM); printf("Random number: %lu \n", random_numbers[index]); }...
long not enough to store an integer
Change long result = (4096*4096*seconds); to long result = (4096L*4096L*seconds); in order to get a long result and avoid int overflow. 4096*4096*seconds is a multiplication of 3 ints, and results in an int, which may overflow before being assigned to your long variable....
How to prevent timeout when running a time consuming PHP
php,timeout,webserver,long-integer
If you want to increase the maximum execution time for your scripts, then just change the value of the following setting in your php.ini file- max_execution_time = 60 If you want more memory for your scripts, then change this- memory_limit = 128M One more thing, if you keep on processing...
Using the sqrt function of math module for long numbers in python
math.sqrt returns an IEEE-754 64-bit result, which is roughly 17 digits. There are other libraries that will work with high-precision values. In addition to the decimal and mpmath libraries mentioned above, I maintain the gmpy2 library (https://code.google.com/p/gmpy/). >>> import gmpy2 >>> n=gmpy2.mpz(99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999982920000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000726067) >>>...
SQL Execution tooks too long
php,mysql,optimization,long-integer
While ORDER BY rand() seems to be the major problem, it might be worth recoding the query to do a join against the sub query:- SELECT s_genre.s_id, series.stitle, series.sdesc FROM s_genre INNER JOIN series ON s_genre.s_id = series.id INNER JOIN ( SELECT a.s_id FROM s_genre a INNER JOIN s_genre b...
why doesn't long long int overflow?
Overflow in scanf triggers undefined behavior. However, many popular implementations of scanf use functions from strto... group internally to convert strings into actual numbers. (Or, maybe more precisely, they use the same lower-level implementation primitives as strto... functions.) strto... functions generate max value of the target type on overflow. The...
Java long is calculated wrongly
You're computing 32-bit signed ints, the computation overflows, and then you assign the result to a long. Do your calculation in 64 bits by making one of the operands a long. For example, add L to one of the operands to make it a long literal: interval = 1000L*60*60*24*30; ...
Java: why the “long” primitive type does not accept a simple number?
java,casting,int,long-integer,primitive-types
long is a datatype that contains 64bits (not to be confused with the Object Long!) vs. an int (32 bits), so you can't use a simple assignment from int to long. See: http://docs.oracle.com/javase/tutorial/java/nutsandbolts/datatypes.html In order to see how to declare the various datatypes, you should check specifically the following table:...
Long or String for Norwegian birth number [duplicate]
The Norwegian eleven digit Birth Number is assigned at birth or registration with the National Population Register. The register is maintained by the Norwegian Tax Office. It is composed of the date of birth (DDMMYY), a three digit individual number, and two check digits. I'd be tempted to create...
Overflow while bit shifting in java
java,long-integer,integer-overflow
1 << 31 is an int, not a long. And what you have is not really an overflow, but Integer.MIN_VALUE (sign bit set, all the rest zeroes). Unless you suffix them appropriately, any numeric constant in Java is an int by default. If you want a long, you have to...
Online judge Rejecting My Answer
You can write a effective program by using a string instead of long. I have used it. Here I am giving the code: #include<iostream> using namespace std; #include<string.h> int main() { char s[80]; //you can take any big index instead 80 gets(s); int a=0,l=strlen(s); for(int i=0;i<l;i++) { if(s[i]==s[l-i]) { a++;...
Why does casting a large double to a long sometimes return a positive and other times return a negative value in C?
objective-c,c,casting,double,long-integer
Casting a variable will result in the runtime code doing the conversion and the resulting overflow is producing the max negative number (0x80000000 an undefined result, but what this runtime is doing). Casting the constant will cause the compiler to convert the number and it does convert to the maximum...
What does 'Natural Size' really mean in C++?
c++,performance,int,long-integer,short
the 'natural size' is the width of integer that is processed most efficiently by a particular hardware. Not really. Consider the x64 architecture. Arithmetic on any size from 8 to 64 bits will be essentially the same speed. So why have all x64 compilers settled on a 32-bit int?...
Using int, double and long in calculation of powers
You could do it manual unless using Math.pow do something like this public static long powerN(int number, int power) { int result = number; while(power > 0) { result*=number; power--; } return (long)result; } ...
Store true/false in Integer using the bits
java,integer,boolean,long-integer,bit
Use bitwise operators : public static void setUnlocked(int id) { unlocked |= 1L<<id; // set the id'th bit } public static boolean isUnlocked(int id) { return (unlocked & (1L<<id)) != 0; // get the id'th bit } 1<<id is the fastest way to compute 2^id. bitwise OR (|) lets you...
Is there any way to set C++ long type size with 8 bytes (x64)?
The actual size of long isn't specified to be an exact number of bytes, only the range of values that it must be able to represent. You could however use fixed width integers std::int64_t This, along with other fixed width integer types, are available in <cstdint>...
How to get Long 19 digits random numbers at PHP?
php,random,long-integer,uniqueidentifier
you can also try this: function random19() { $number = ""; for($i=0; $i<19; $i++) { $min = ($i == 0) ? 1:0; $number .= mt_rand($min,9); } return $number; } echo random19(); which would output some random 19 numbers: 6416113158912395605...