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Increase capacity for vector

c++,vector,push-back,capacity

Why do you have to create a new Vector<T>? Just create a new array: template <class T> void Vector <T> :: push_back(const T & number) { if(numItems == capacity) { capacity *= 2; T* newData = new T[capacity]; std::copy(data, data + numItems, newData); delete[] data; data = newData; } data[numItems++]...

Why do Slices always have an even capacity?

swift,slice,capacity

Increasing the capacity only allocates internal memory, but does not increase the endIndex of the slice. You still have to append new elements: for index in range.startIndex..<range.endIndex { slice.append(index) } which is the same as slice += range Or you can replace an empty slice with a new one, for...

JMeter script that loops and increases throughput until failure

loops,jmeter,throughput,capacity

You can go the following way: Set your test to run "Forever" on Thread Group level Set "Action to be taken on a Sampler error" to "Stop Test" Add a Constant Throughput Timer to your test plan with very low initial value like 60 requests per minute (= 1 request...

Advantages of creating an ArrayList with initial capacity of 0?

java,arraylist,capacity

It keeps the size (in memory) of the ArrayList very small, and is a tactic for when you want the variable to be non-null and ready to use, but don't expect for the List to be populated immediately. If you expect it to be populated immediately, it's best to give...

Slices in Go: why does it allow appending more than the capacity allows?

go,append,slice,capacity

The builtin append() function uses the specified slice to append elements to if it has a big enough capacity to accomodate the specified elements. But if the passed slice is not big enough, it allocates a new, big enough slice, copies the elements from the passed slice to the new...

imgur API v3 upload image keep getting back status 1203: “Imgur is over capacity. Please try again.”

api,imgur,capacity

Imgur is frequently over capacity, so perhaps you can try again later. I doubt it's a problem on your end.

Stack linkedlist with initial Capacity

java,list,linked-list,stack,capacity

LinkedList allocate a memory when item is added in it. There is no meaning of initial capacity. Each item has a pointer to next item. Why don't you use Stack that has a ensureCapacity() method? ...

C++ dynamic array, increasing capacity

c++,arrays,dynamic,capacity

Here is a better way of doing it. Everything is well explained in the comments for anyone who wants to learn: #include <iostream> using namespace std; int* changeCapacity(int *arr, int length, int newCapacity); int* addElement(int *arr, int& length, int& capacity, int val); int main(){ int length = 0; // no...

How to efficiently insert a series of values into a std::deque?

c++,deque,c++03,capacity

Unlike in a vector, the storage for a deque is never reallocated upon appending new elements. That means that existing elements never have to be moved. Thus there is no benefit to reserving ahead of time.

What is the best practice for setting the initial capacity of an ArrayList that is not always used?

java,arraylist,constructor,capacity

Premature optimisation is the root of all evil. - D. Knuth. This seems like the kind of "performance issue" which actually never has any effect on performance. For one thing, how sure are you that these empty lists are actually initialised? I suspect that most modern compilers delay initialisation of...