How to split a String by space
What you have should work. If, however, the spaces provided are defaulting to… something else? You can use the whitespace regex: This will cause any number of consecutive spaces to split your string into tokens.
arrays
C# equivalent of C++ map
Roughly:-
“Notice: Undefined variable”, “Notice: Undefined index”, and “Notice: Undefined offset” using PHP
Notice: Undefined variable From the vast wisdom of the PHP Manual: Relying on the default value of an uninitialized variable is problematic in the case of including one file into another which uses the same variable name. It is also a major security risk with register_globals turned on. E_NOTICE level error is issued in case of working with uninitialized variables, however not … Read more
How do I declare a 2d array in C++ using new?
If your row length is a compile time constant, C++11 allows See this answer. Compilers like gcc that allow variable-length arrays as an extension to C++ can use new as shown here to get fully runtime-variable array dimension functionality like C99 allows, but portable ISO C++ is limited to only the first dimension being variable. Another efficient option is … 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.
Loop through an array php
Using foreach loop without key Using foreach loop with key Using for loop var_dump is a really useful function to get a snapshot of an array or object.
Are vectors passed to functions by value or by reference in C++
In C++, things are passed by value unless you specify otherwise using the &-operator (note that this operator is also used as the ‘address-of’ operator, but in a different context). This is all well documented, but I’ll re-iterate anyway: You can also choose to pass a pointer to a vector (void foo(vector<int> *bar)), but unless you … Read more
How to print the array?
What you are doing is printing the value in the array at spot [3][3], which is invalid for a 3by3 array, you need to loop over all the spots and print them. This will print it in the following format if you want more exact formatting you’ll have to change how the printf is formatted.
How to create an associative array in JavaScript literal notation
JavaScript has no associative arrays, just objects. Even JavaScript arrays are basically just objects, just with the special thing that the property names are numbers (0,1,…). So look at your code first: It’s important to understand that myArray[‘a’] = 200; is identical to myArray.a = 200;! So to start with what you want: You can’t create a JavaScript array and … Read more
C pointers and arrays: [Warning] assignment makes pointer from integer without a cast
In this case a[4] is the 5th integer in the array a, ap is a pointer to integer, so you are assigning an integer to a pointer and that’s the warning.So ap now holds 45 and when you try to de-reference it (by doing *ap) you are trying to access a memory at address 45, which is an invalid address, so your program crashes. You should do ap … Read more