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How to initialise memory with new operator in C++?
...to C++ and I want to pick up some good habits. If I have just allocated an array of type int with the new operator, how can I initialise them all to 0 without looping through them all myself? Should I just use memset ? Is there a “C++” way to do it?
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How do you copy the contents of an array to a std::vector in C++ without looping?
I have an array of values that is passed to my function from a different part of the program that I need to store for later processing. Since I don't know how many times my function will be called before it is time to process the data, I need a dynamic storage structure, so I chose a std::vector ....
what is faster: in_array or isset? [closed]
...case is faster because
It uses an O(1) hash search on the key whereas in_array must check every value until it finds a match.
Being an opcode, it has less overhead than calling the in_array built-in function.
These can be demonstrated by using an array with values (10,000 in the test below), for...
Javascript foreach loop on associative array object
Why my for for-each loop is not iterating over my JavaScript associative array object?
9 Answers
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Why use pointers? [closed]
...and so on. But let's not go into that here.
How do you use pointers with arrays?
With little effort and much confusion. ;-) If we talk about simple data types such as int and char there is little difference between an array and a pointer.
These declarations are very similar (but not the same - ...
How do you extract a column from a multi-dimensional array?
Does anybody know how to extract a column from a multi-dimensional array in Python?
20 Answers
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Find a value in an array of objects in Javascript [duplicate]
...ions have been asked before, but this one is a little different. I have an array of unnamed objects, which contain an array of named objects, and I need to get the object where "name" is "string 1". Here is an example array.
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Remove array element based on object property
I have an array of objects like so:
14 Answers
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Check if a Bash array contains a value
In Bash, what is the simplest way to test if an array contains a certain value?
35 Answers
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Where is array's length property defined?
We can determine the length of an ArrayList<E> using its public method size() , like
7 Answers
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