set time interval for javascript function in “microseconds”
4 ms is the minimum timeout in standard HTML5 according to the spec See this reference: https://developer.mozilla.org/en-US/docs/Web/API/WindowTimers/setTimeout#Minimum_delay_and_timeout_nesting You may think you can assign any amount of duration in millisecond which is as small as you want in JavaScript, however, it is limited by the HTML5 spec that the minimum delay...
Void function (c++)
c++,function,void,equation,quadratic
When you declare a function like void add_nmbr(int a, int b, int c) you are passing parameters by value which means you pass a copy of value into the function. You can change the value inside add_nmbr for a but that value stays inside the function. In you case, the...
jQuery - Value in Function
You need to use brackets notation to access property by variable: function myFunc( array, fieldToCompare, valueToCompare ) { if( array[fieldToCompare] == "Thiago" ) alert(true); } And wrap name in quotes: myFunc( myArray, 'name', "Thiago" ); ...
Read blank as missing(NA) in R data table
You can use the fast nzchar like this : is.na(x) | !nzchar(x) For example : x <- c(NA,'','a') is.na(x) | !nzchar(x) ## [1] TRUE TRUE FALSE apply this to OP example: I wrap this in a function with ifelse : tt <- data.table(x=c('an','ax','','az'),y=c('bn','','bz','bx')) tt[, lapply(.SD, function(x) ifelse(is.na(x) | !nzchar(x),'some value',x))...
SQL average age comparison function returns null
While you declared the variable averMen, you have not initialized it. The query which should be calculating averMen is calculating averWomen instead. Try changing ... SELECT AVG(DATEDIFF(BIRTH_DATE,CURDATE())) INTO averWomen FROM PLAYERS WHERE sex = 'M'; into SELECT AVG(DATEDIFF(BIRTH_DATE,CURDATE())) INTO averMen FROM PLAYERS WHERE sex = 'M'; ...
Once again: JS functions and objects
How does JS know the difference between an object with a function property and a constructor to which properties have been added? There are different terminologies: Functions are objects which are Function instances. Callable objects are objects with an internal [[Call]] method. Constructors are objects with an internal [[Construct]]...
Can't understand this Javascript function (function overloading)
javascript,function,methods,overloading
fn.length will return the number of parameters defined in fn. Will arguments.length return the number of which arguments? The already existing function's? No. arguments is an array-like local variable that's available inside of a function. It contains the number of arguments passed to the function. The rest of your...
xslt condition output one by one
xml,function,xslt,if-statement,xpath
Try: <xsl:template match="blabla"> <all> <xsl:for-each select="a"> <a n="{@n}"> <xsl:copy-of select="../b[@n >= current()/@n]"/> </a> </xsl:for-each> </all> </xsl:template> ...
Replace paragraph in HTML with new paragraph using Javascript
javascript,function,onload,getelementbyid,appendchild
You can just replace the text content of the #two element: var two = document.getElementById("two"); window.onload = function () { var t = "I am the superior text"; two.textContent = t; }; <p id="two">Lorem ipsum dolor sit amet.</p> If you use createTextNode, then you'll need to use two.textContent = t.textContent...
Can anyone improve on the below Fuzzyfind function for VBA?
algorithm,vba,function,find,fuzzy-search
Try this out, I think it will find the best match Function FuzzyFind2(lookup_value As String, tbl_array As Range) As String Dim i As Integer, str As String, Value As String Dim a As Integer, b As Integer, cell As Variant Dim Found As Boolean b = 0 For Each cell...
Update input number variable onclick
javascript,jquery,html,function
You need to put all the calculations into the calc() function: function calc() { // Get Years var years = (document.getElementById('years').value); // Variables var years; var gallons = 1100 * 365; var grain = 45 * 365; var forest = 30 * 365; var co2 = 20 * 365; var...
Toggle text + also call method with argument?
Why not just: document.addEventListener("keydown", function(e) { if (e.keyCode == "32") { e.preventDefault(); $(".spacebar_left").text(function(i, v) { if (v === 'PUSH ME') { custommethod("start") return 'DON"T PUSH ME' } else { custommethod("end") return "PUSH ME" } }) } }); p.s.: in your example custommethod() is never called as it goes after return...
How do I set up a bash alias for a common working folder?
Two workarounds: Add this to your .bashrc: CDPATH="$CDPATH:$HOME/some/deep/working" then you can use cd folder/bob from everywhere. Use a variable: myfolder="$HOME/some/deep/working/folder" cd "$myfolder/bob" ...
sql server function does not allow return statement
Take a look at this example... You still need to add your logic to it. But it should give you a hint. CREATE FUNCTION dbo.fnGetToInvoiceLoads (@TruckID int, @ClientID int, @OpdrachtID int, @OpcID int, @VertrekIDs varchar(max), @BestemmingIDs varchar(max), @CarIDs varchar(max)) RETURNS @result TABLE (RitChecked bit, RitID int, ClientID int) AS BEGIN...
Count neighboring cells
Your upper limit in your for statements should by checking for <= not just less-than. By testing for less-than you stop before getting to x+1 or y+1. It should look like this: for (int i = Math.max(0, x - 1); i <= Math.min(grid.getWidth()-1, x + 1); i++) { for (int...
PercentOfSum(fld, condfld) SSRS Equivalent
function,reporting-services,crystal-reports,ssrs-2008,ssrs-2008-r2
It's a tricky question because grouping in SSRS is handled outside of functions, so the equivalent to condfld is explained here. The short answer is the cell will generally obey the grouping that you have applied to the row. So onto the percent, you'll need an expression (right click on...
what does php's header function do?
php,function,http,header,content-type
why this code is sending "header('HTTP/1.1 200 OK');"? i know this code means that the page is Good, but why are we sending this code??_ This tells your browser that the requested script was found. The broswer can then assume it will be getting some other data as well....
JS Browser with pause function, help please
Add a variable for your timeout period, instead of using the value 4000. Note that it must have global scope. I've added a variable calleddelay here: var wnd; var curIndex = 0; // a var to hold the current index of the current url var delay; Then, use the new...
What makes the object.prototype to the constructor function if he has no name? [duplicate]
javascript,function,class,inheritance,prototype
after constructorFunction.prototype there is no propertie or method name That's not true. The prototype of the constructor is set using triangle object. The prototype has 3 properties. prototype is an object. Consider these examples: var obj = { 'baz': 'bar' }; obj = { 'foo': 'bash' } // obj...
How to perform a statement inside a query to check existence of a file that has the query id as name with less resources in laravel
php,function,laravel,laravel-4,eloquent
Do you have good reason to believe that scandir on a directory with a large number of folders will actually slow you down? You can do your query like this: if(Input::has('field')){ $filenames = scandir('img/folders'); $query = Model::whereIn('id', $filenames)->get(); } Edit 1 You may find these links useful: PHP: scandir() is...
How to pass pointer to struct to a function?
Inside your doStuff() function, myCoords is already a pointer. You can simply pass that pointer itself to calculateCoords() and calculateMotorSpeeds() function. Also, with a function prototype like void calculateCoords(struct coords* myCoords) calling calculateCoords(&myCoords); from doStuff() is wrong, as it is passing struct coords**. Solution: Keep your function signature for calculateCoords()...
How to execute JavaScript function in an Ajax() Response
javascript,jquery,ajax,function,eval
You should delegate event: $(".allShopping-deals").on('click', '.products', function(){ alert($(this).find('.pid').text()); }); ...
How to call a data.frame inside an R Function by name
There are number of ways of doing this. Your "native" way would be mydata <- ls(pattern = "set") for (dataCount in mydata) { print(summary(lm(x~y, data=get(dataCount)))) } or you could collate your data.frames into a list and work on that. mylist <- list(set1, set2) lapply(mylist, FUN = function(yourdata) { print(summary(lm(x ~...
R function that calculate correlation between two elements of a data frame if condition is meet
Try this: corr <- function(directory, threshold = 0) { files <- list.files(directory, full.names = T) dat2 <- lapply(files, function(x) na.omit(read.csv(x))) size <- unlist(lapply(dat2, nrow)) cors <- lapply(dat2[size > threshold], function(x) cor(x['nitrate'], x['sulfate'])) res <- unname(unlist(cors)) } ...
Stopping condition on a recursive function - Haskell
string,function,haskell,if-statement,recursion
Your code doesn't handle the case where a line is shorter than the maximum length. This is somewhat obscured by another bug: n is decremented until a whitespace is found, and then f is called recursively passing this decremented value of n, effectively limiting all subsequent lines to the length...
Scope in javascript acting weird
javascript,function,scope,pass-by-reference
If you added another line you can get a clearer picture of what is happening: function change(a,b) { a.x = 'added'; a = b; a.x = 'added as well'; }; a={}; b={}; change(a,b); console.log(a); //{x:'added'} console.log(b); //{x:'added as well'} When you're doing a = b you're assigning the local variable...
C# add to list not working
Because that's not the way to show a list in the console. Try this: for(int i=0;i<slope.Count;i++) { Console.WriteLine(slope[i]); } ...
When calling a recursive function to order values, it misses one. How do I fix this?
python,algorithm,function,recursion
Just sort on the last column: sorted(f,key=lambda x: int(x.split(",")[-1])) You can use bisect to find where to put the new data to keep the data ordered after it is sorted once: from bisect import bisect import csv with open("foo.txt") as f: r = list(csv.reader(f)) keys = [int(row[-1]) for row in...
accessing a variable from outside a function and returning the variable. In a module pattern
javascript,function,module,scope
When you module first gets executed (e.g. when you script is first parsed), addAmount is assigned the return value of getAmount() which, when you don't pass in an argument, is undefined. Now when you return the object from the module and assign returnAmount to addAmount - you are setting returnAmount...
Interpret formulae/operators as functions
r,function,variable-assignment,formula,evaluation
You can do this: `*` <- intersect `+` <- c Be aware that if you do that in the global environment (not a function) it will probably make the rest of your script fail unless you intend for * and + to always do sum and intercept. Other options would...
PHP: How to use function to either echo result or to save it in a variable (partially working)
Just return the value in the function instead of echoing it: function fetchTransMain($trans, $itemID){ foreach($trans as $key => $val){ if($val["ID"] == $itemID){ return $val["trans"]; } } } Then, when you want to print it you do: echo fetchTransMain($trans, someID); Otherwise you do: $someVariable = fetchTransMain($trans, someID); ...
JavaScript recursive function breaks when () included in call
If you write down setTimeout(countdown(), 1000);, basically when that block of code gets evaluated, JS will call countdown() inmediatelly. By doing setTimeout(countdown, 1000);, you are passing a reference to the function countdown as the first argumant, thus, it won't be executed until 1 second later as per the second argument...
Functions with pointer arguments in C++
c++,function,pointers,constructor,ampersand
Item i2(i1); This works because it is not calling your user-defined constructor which takes a pointer, it is calling the implicitly generated copy-constructor which has the signature: Item (const Item &); If you don't want this to be valid, you can delete it (requires C++11): Item (const Item &) =...
Delete file after “x” second after creation
You must handle the timed event in a handler for the Timer's Tick Event (or Elapsed if using System.Timers.Timer): Private m_strTest As String = String.Empty Private Sub Form1_Click(sender As Object, e As EventArgs) Handles Me.Click m_strTest = Application.StartupPath & "\" + tte4 Timer1.Enabled = True End Sub If using System.Forms.Timer...
JSLint won't recognize getElementById
javascript,function,getelementbyid,jslint
You missed document prefix. As getElementById is defined on document object you've to call it using document object as follow: document.getElementById("player").play(); // ^^^^^^ Docs...
Is it possible to use $(this) in a function called from another function?
Always be careful when using the this as you may end up using an unexpected value depending on the context your function was called. Instead, you should consider using a parameter: $('.member-div a').on("click",function(f){ f.preventDefault(); newfunc($(this)); }); function newfunc(item){ var x = item.parent('div').attr('id').slice(-1); $('.member-div').hide(); if(item.hasClass('next')){ var y = parseInt(x)+1; }; if(item.hasClass('back')){...
Swift func - Does not conform to protocol “Boolean Type”
You don't need to add parameters into return like this (isGot: Bool, dictLocations: Dictionary <String, Double>). you just need to tell compiler that what type this function will return. Here is the correct way to achieve that: func getRecordNumber(recordNumber: Int32) -> (Bool, Dictionary <String, Double>) { let isGot = Bool()...
How to have multiple variable function work with vectors
Scilab doesn't have a direct analogue of Python's fcn(*v) function call that would interpret the entries of v as multiple arguments. If you want to be able to call your function as either fcn(1,2,3,4,5,6) or as v = 1:6; fcn(v), then you'll need to add this clause to its beginning:...
How to skip a function
If I you're asking what I think you're asking, then yes. In fact, that's the whole point. Functions are sections of reusable code that you define first (they don't run when they're defined!) and then you call that function later. For example, you can define a function, helloworld like this:...
C++ need help figuring out word count in function. (Ex. Hello World = 2)
int wordCounter(char usStr[]) { int index= sizeof(usStr); int result = 0; for (int i=0; i<index; i++){ if(usStr[index]== ' ') result++; }//end of the loop return result+1; } //try this one. ...
Call known function (with parameters) in class whose name is defined by string variable
Your can use Reflection Object action = ???; // perhaps you need .newInstance() for action class // Hopefully you have a interface with performLogic String methodName = "performLogic"; try { Method method = action.getClass().getMethod(methodName, param1.class, param2.class); method.invoke(action, param1, param2); } catch (SecurityException | NoSuchMethodException e) { // Error by get...
Get array output of one function in another function php
Simply pass that value within that function as public function add_attachments($openid) { $config = array( 'upload_path' => './uploads/attachments/', 'allowed_types' => 'gif|jpg|png|jpeg|doc|pdf', 'max_size' => '1024000000', 'multi' => 'all' ); $this->load->library('upload', $config); if (!$this->upload->do_upload()) { $error = array('error' => $this->upload->display_errors()); } else { $data = $this->upload->data(); } $new_array = array_column($data, 'full_path'); $this->getback($new_array);...
Why doesn't this swift function work?
In the inner loop for y in 0..<loc_except.count { if loc[x] != loc_except[y] { loc[x] = "-" } } loc[x] is replaced by the dash "-" if it is different from any characters in loc_except. This will always be the case if the exception string has at least two different...
Python 3 random.randint() only returning 1's and 2's
function,python-3.x,random,dice
this line if die == 'a' or 'A': will always return True. That is because the way the items are grouped, it is the same as if (die == 'a') or ('A'): and 'A' (along with any string except "") is always True. Try changing all those lines to if...
Why can we use undefined object in Javascript function declaration?
The 2nd argument of cr.define() is an anonymous function expression, it is parsed and executed, the returned value is an object, which is then passed to cr.define() as argument. In fact it's not. It's just passed as a function to cr.define, without being called. It's executed from within there:...
is return main(); a valid syntax?
c,function,return,language-lawyer,return-type
I didn't know that the return statement accepts any parameter that can be evaluated to the expected return data type, Well, a return statement can have an expression. Quoting C11 standard, chapter 6.8.6.4, The return statement. If a return statement with an expression is executed, the value of the...
XQuery - Doing math on elements within a sequence and aggregating results
function,operators,xquery,sequence,aggregation
The error is occurring because you're using operations (like multiplication) that take exactly two arguments, and passing a sequence on one side or both. To illustrate the meaning of the error -- you get the exact same thing running: (1,2,3) * 2 Since your goal is to multiply values together...
Python avoid item = None in a request of multiple items
python,function,request,urllib,nonetype
You can use a try/except block around the code that's causing the issue. If the list is empty, run the next iteration of the outer for loop (untested): def searchGoFromDico(dictionary): dicoGoForEachGroup = {} for groupName in dico: taxonAndGene = dico[groupName] listeAllGoForOneGroup = [] for taxon in taxonAndGene: geneIds = taxonAndGene[taxon]...
Counting bytes received by posix read()
Yes, temp_uart_count will contain the actual number of bytes read, and obviously that number will be smaller or equal to the number of elements of temp_uart_data. If you get 0, it means that the end of file (or an equivalent condition) has been reached and there is nothing else to...
My function will log a value to the console, but it won't return the same value - why? [duplicate]
javascript,arrays,function,recursion
You're missing a return when calling steamroller recursively. Fixed code: function steamroller(arr) { arr = arr.reduce(function(a, b, i){ return a.concat(b); },[]); if (!Array.isArray(arr[arr.length-1])) {console.log(arr); return arr;} return steamroller(arr); } steamroller([1, [2], [3, [[4]]]]); ...
Find out the biggest odd number from three arguments in a function [Python]
A few changes would be needed: def oddn(x,y,z): odd_number_keeper = [] for item in [x,y,z]: if item % 2==1: odd_number_keeper.append(item) if not odd_number_keeper: print 'No odd number is found' return return max(odd_number_keeper) Iterate over the values x, y and z and add the odd numbers to odd_number_keeper. If there are...
How do I fix function compilation error?
oracle,function,plsql,sql-update
I would try not to use a function at all. Using straight SQL is usually a better solution. Based on the information you gave we have the following tables. (Your function does compile with these tables.) CREATE TABLE emp_task (emp_id NUMBER PRIMARY KEY ,grade_id NUMBER ,sal NUMBER); CREATE TABLE sal_inc...
Pick subset of functions as string & evaluate
javascript,jquery,arrays,string,function
I could see two things wrong: Your functions were not assigned to the window Your "effect" variable contained leading whitespace I have corrected the above points here: http://jsfiddle.net/ftaq8q4m/1/ This appears to have resolved the issue you described. Example: window.func1 = function() { $('html').append('func1'); } And: window[effect.trim()](); Update As a bonus...
function pointer is not a function or function pointer
funcy is a pointer to a member function, so you need to call it on an instance of the class, like this: (this->*funcy)(items,i); ...
A function to calculate cumulative maximum for a double matrix in MATLAB
If cummax isn't working then I came up with this little function function m = cummax2(x) [X, ~] = meshgrid(x, ones(size(x))); %replace elements above diagonal with -inf X(logical(triu(ones(size(X)),1))) = -inf; %get cumulative maximum m = reshape(max(X'), size(x)); end ...
Casting a String Into a Function in R
You can use parse() and eval(): foo <- eval(parse(text = function_code)) > foo function(x) { as.dist(1-cor(t(x))) } Just wrap that in a function: parseEval <- function(text) { eval(parse(text = text)) } If you need an actual something() rather than a direct call. Here's an example: set.seed(1) x <- matrix(runif(20), ncol...
How do I return a value from a second function in PHP?
Your code is mostly working, you simply misplaced some quotes and concatenation. Adding quotes where they shouldn't be or forgetting to add them where needed will cause PHP to misinterpret your code. You might consider using a code editor or IDE to avoid this in the future. They will highlight...
Decremented value called in the recursion in Haskell
string,function,haskell,recursion,parameters
Yes, once you call again f with a new value of n, it has no way to reference the old value of n unless you pass it explicitly. One way to do it is to have an internal recursive function with its width parameter, as you have, but that can...
Functions and pointers in C
That's not the correct way to a pointer from a function. Also r is local variable whose lifetime is limited to the function. Allocate memory using malloc and return it instead: int* randn(int n, int l){ int *r=malloc(n * sizeof *r); if(!r) { */ error */} int i; for (...
Calling function and passing arguments multiple times
a,b,c = 1,2,3 while i<n: a,b,c = myfunction(a,b,c) i +=1 ...
How to produce legend in ggplot by mapping aes_string from different data frames in ggplot?
You can use shQuote to quote the string and scale_fill_manual to map the strings to appropriate colors x_var <- "Score" ggplot(met1, aes_string(x_var)) + geom_density(data=met1, aes_string(x=x_var, fill=shQuote("b"))) + geom_density(data=met1[met1$Group=="Group1",], aes_string(x=x_var, fill=shQuote("r")), alpha=0.50) + scale_fill_manual(name='Groups', guide='legend', values=c("b"="black", "r"="red"), labels=c('All Groups', 'Group1')) ...
Global scope for array of structs inside function - Swift
arrays,function,swift,struct,shuffle
"...that doesn`t seem to work..." is a variation on perhaps the least helpful thing you can say when asking for help. What do you mean it "doesn't seem to work"?!?!? How doesn't it work? Explain what it's doing that doesn't meet your needs. Is it crashing? Is the shuffledQuestions array...
Passing Pointers through a Function Then Getting Giberish
x is the address of arr and arr is a stack variable so you cannot pass it as a return value. If you want check to return a pointer to an array you need to allocate it with new: arr = new int[r]. Note that you will need to eventually...
How can I minimize this function in R?
r,function,optimization,mathematical-optimization
I think you want to minimize the square of a-fptotal ... ff <- function(x) myfun(x)^2 > optimize(ff,lower=0,upper=30000) $minimum [1] 28356.39 $objective [1] 1.323489e-23 Or find the root (i.e. where myfun(x)==0): uniroot(myfun,interval=c(0,30000)) $root [1] 28356.39 $f.root [1] 1.482476e-08 $iter [1] 4 $init.it [1] NA $estim.prec [1] 6.103517e-05 ...
Passing a vector as argument to function
Use the referenced type void Foo(std::vector<bool> &Visited, int actual element); Otherwise the function deals with a copy of the original vector. Here is a dempnstrative program #include <iostream> #include <vector> void f( std::vector<int> &v ) { v.assign( { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 } );...
My is_prime function fails on 9, and I don't know why?
That is because the function does not check all eligible divisors until it returns. Instead, it exits early with True if x is not divisible by 2, which is not what you want for odd numbers (e.g. 9 is not divisible by 2, yet it's not prime). Instead, you want...
How to allow variable parameters passed to function
What you want is called Variadic function. It can accept variable number of arguments. **Famous examples: printf()/scanf() These functions contain an ellipsis (…) notation in the argument list, and uses special macros to access the variable arguments. The most basic idea is to write a function that accepts a variable...
How can I simulate a nested function without lambda expressions in C++11?
c++,function,c++11,lambda,allegro
Simply put the image inside the visual_plot function and make it static: void visual_plot() { static Image img("sample.png"); x.draw(); // Problem. } This will initialize img the first time visual_plot is called, and only then. This will solve both the performance problem and the "it must be initialized after app.run()"...
How to return an array with unhappy numbers removed?
I've written a small function (which might be further improved) to test the "happines" of a number. Current version only works with scalar and one dim. array. Input: the scalar or array to be tested Output: 1) an index: happy (1) unhappy(0) 2) the list of happy number within the...
call function after “loop” function for multiple elements is finished in jQuery
jquery,function,loops,animation
I didn't want to rewrite it all but you have some necessary stuff. It illustrates the use of the fadeIn callback. https://jsfiddle.net/c633f5w8/4/ var v = $(".box"); var cur = 0; var len = v.length; console.log(len); var first = function () { function fadeInNextLI() { if(cur+1 == len){ v.eq(cur++).fadeIn(200,'swing',finish); } else...
MySQL function with parameters syntax error
You must be getting an error on the SET @dd line. You can't set values to any variable by assigning a statement. You have to use SELECT .... INTO ... syntax to set value for a variable. There are several other errors in your code. Change them as suggested below:...
need help to search element from vector of struct
A lambda is just a convenience functor that was introduced so that you can write these algorithms simpler. But it's just a convenience. If you can't use them in this case, it's not the end of the world. After all, we couldn't for many many years. The solution is to...
Excel Function Error
From what I understand that you are trying to achieve, the logic is wrong. I would suggest =IF(H4<50;"Sigur";IF(H4<100;"Probabil";"Da")) Note I removed the "text" function - the double quotes are enough.
Trying to include an array using a function to require the files with the array
functions in php create scope. this means any variable defined inside a function is not visible outside of it's body function foo() { $bar = 1; } // Here $bar is undefined foo(); // Still undefined In you case, you initialize the $lang variable inside the lang_files function, so it's...
Stuck on Structs(c++)
You have declared coordinate startPt, endPt; in main() and you are trying to access them Readcoordinate(). To resolve error you should declarecoordinate startPt, endPt;inReadcoordinate()` or pass them as argument. coordinate Readcoordinate() { coordinate startPt; cout << "Enter Longitude(in degrees)" << endl; cin >> startPt.latitude >> startPt.longitude >> startPt.city; return startPt;...
Fetch a function definition without rights on source files
php,function,source,server-side,definition
If you can call the function that means you can include its file to load it which means you can inspect the file contents. If you didn't have permissions to include (read) the file then you couldn't load the function and you couldn't call it and for all intents and...
sum of Digits through Recursion
java,function,recursion,sum,digit
You aren't actually recursing. You've setup your base case, but when solving a problem recursively you should have code within the function that calls the function itself. So you're missing a line that calls sumDigits, with a smaller argument. Consider two important parts of a recursive soutlion: The base case....
Object Oriented Python - rectangle using classes and functions
python,function,class,oop,methods
Not sure I got your question right, but you may want to try: def getStats(self): return "width: %s\nheight: %s\narea: %s\nperimeter: %s" % (self.width, self.height, self.area(), self.perimeter()) To satisfy requirements 4 and 6, I would suggest something like: class Shape(object): def area(self): raise NotImplementedError def perimeter(self): raise NotImplementedError class Rectangle(Shape): def...
Why is the button.setText() shows error
You cannot touch UI from background thread. use AsyncTask http://developer.android.com/reference/android/os/AsyncTask.html
Selecting and removing a html select option without selecting by index or ID, using vanilla JavaScript
javascript,function,select,options
Something like this? (function (){ var parent = document.getElementById("MediaCategory"); for(var i=0; i< parent.children.length; i++){ var child = parent.children[i]; if(child.text === "Archive") { parent.removeChild(child); } } })(); ...
passing arguments via reference and pointer C++
c++,function,pointers,reference
Yes. There's no copy anywhere as you're either using pointers or references when you “pass” the variable from one place to another, so you're actually using the same variable everywhere. In g(), you return a reference to z, then in f() you keep this reference to z. Moreover, when you...
Reversing the output of a function in python that is not a list
Your method func is missing a return statement (and thus returns None). Without returning a value, you can't apply the index operator on it.
Function Returning Square Brackets When Using Array Methods
You are passing the range indexes in the wrong order. You cant go from 5 to 2, you need to go from 2 to 5 range(2,5) ...
How does ((a++,b)) work? [duplicate]
In your first code, Case 1: return reverse(i++); will cause stack overflow as the value of unchanged i will be used as the function argument (as the effect of post increment will be sequenced after the function call), and then i will be increased. So, it is basically calling the...
in jquery can i add a readonly attribute to a input that the only property i can touch is a function?
Yes, you can, using an attribute equals selector: $('input[onkeydown="return scriptReadonly();"]').prop("readonly", true); Live Example: function scriptReadonly() { } $('input[onkeydown="return scriptReadonly();"]').prop("readonly", true); <INPUT id="ctl00_ContentPlaceHolder_txtSOPurchaserSapID" onkeydown="return scriptReadonly();" style="WIDTH: 150px" name=ctl00$ContentPlaceHolder$txtSOPurchaserSapID> <INPUT id="ctl01_ContentPlaceHolder_txtSOPurchaserSapID" onkeydown="return scriptReadonly();" style="WIDTH: 150px"...
How to have parameters to a button command in tkinter python3 [duplicate]
python,function,python-3.x,tkinter
You are looking for the lambda keyword: from tkinter import * index={'Food':['apple', 'orange'], 'Drink':['juice', 'water', 'soda']} Names=['Food', 'Drink'] def display(list): for item in list: print(item) mon=Tk() app=Frame(mon) app.grid() for item in Names: Button(mon, text=item, command= lambda name = item: display(index[name])).grid() mon.mainloop() You have to use name = item so that...
session value in javascript cannot be set
Javascript is a client-side language. Session are server-side component. If you want to update session when user does something on your page, you should create a ajax request to the server. Or maybe use some client side variables that, for some aspects, are similar to session (they will be forever...
Genetic Algorithm - convergence
java,algorithm,function,genetic-programming,convergence
I don't have the time to dig into your code but I'll try to answer from what I remember on GAs: Sometimes I will give it points that will never produce a function, or will sometimes produce a function. It can even depend on how deep the initial trees are....