How to add element to C++ array?
There is no way to do what you say in C++ with plain arrays. The C++ solution for that is by using the STL library that gives you the std::vector. You can use a vector in this way:
arrays
How to make an array with a dynamic size? General usage of dynamic arrays (maybe pointers too)?
For C++: If you just need a container just use std:vector. It will take care all the memory allocations necessary for you. However if you want to develop your own dynamic container (whatever reasons you have) you have to take care off the memory allocations yourself. That is, when your array grows you have to allocate new … Read more
Remove an array element and shift the remaining ones
You just need to overwrite what you’re deleting with the next value in the array, propagate that change, and then keep in mind where the new end is: Now your array is {1, 2, 4, 5, 6, 7, 8, 9, 9}. You cannot delete the extra 9 since this is a statically-sized array, you just have to ignore … Read more
Fill array with random numbers within a specified range (C++)
You are using exact same integer in each initialization. for loop should be like that
Most efficient way to convert an HTMLCollection to an Array
will have the same effect using “native” code. Edit Since this gets a lot of views, note (per @oriol’s comment) that the following more concise expression is effectively equivalent: But note per @JussiR’s comment, that unlike the “verbose” form, it does create an empty, unused, and indeed unusable array instance in the process. What compilers do about … Read more
What is the difference between a null array and an empty array?
Technically speaking, there’s no such thing as a null array; but since arrays are objects, array types are reference types (that is: array variables just hold references to arrays), and this means that an array variable can be null rather than actually pointing to an array: An empty array is an array of length zero; it has no elements: (and can never have elements, … Read more
Adding values to a C# array
You can do this way – Alternatively, you can use Lists – the advantage with lists being, you don’t need to know the array size when instantiating the list. Edit: a) for loops on List<T> are a bit more than 2 times cheaper than foreach loops on List<T>, b) Looping on array is around 2 times cheaper than looping on … Read more
Short circuit Array.forEach like calling break
There’s no built-in ability to break in forEach. To interrupt execution you would have to throw an exception of some sort. eg. Run code snippetExpand snippet JavaScript exceptions aren’t terribly pretty. A traditional for loop might be more appropriate if you really need to break inside it. Use Array#some Instead, use Array#some: Run code snippetExpand snippet This works because some returns true as soon as any of the … Read more
Short circuit Array.forEach like calling break
There’s no built-in ability to break in forEach. To interrupt execution you would have to throw an exception of some sort. eg. Run code snippetExpand snippet JavaScript exceptions aren’t terribly pretty. A traditional for loop might be more appropriate if you really need to break inside it. Use Array#some Instead, use Array#some: Run code snippetExpand snippet This works because some returns true as soon as any of the … Read more
What’s the difference between “Array()” and “[]” while declaring a JavaScript array?
There is a difference, but there is no difference in that example. Using the more verbose method: new Array() does have one extra option in the parameters: if you pass a number to the constructor, you will get an array of that length: To illustrate the different ways to create an array: Another difference is that when … Read more