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How can I detect if the user is on localhost in PHP?
...ddress of the client requesting is given by the web server.
$whitelist = array(
'127.0.0.1',
'::1'
);
if(!in_array($_SERVER['REMOTE_ADDR'], $whitelist)){
// not valid
}
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How to get index of object by its property in JavaScript?
...
As the other answers suggest, looping through the array is probably the best way. But I would put it in it's own function, and make it a little more abstract:
function findWithAttr(array, attr, value) {
for(var i = 0; i < array.length; i += 1) {
if(array[i][a...
Using Default Arguments in a Function
...g($params)) {
// single argument given as string
} else if (is_array($params)) {
// params could be an array of properties like array('x' => 'x1', 'y' => 'y1')
} else if (func_num_args() == 3) {
$args = func_get_args();
// 3 parameters passed
} else...
Why is a C++ Vector called a Vector?
...d Template Library, was looking for a name to distinguish it from built-in arrays. He admits now that he made a mistake, because mathematics already uses the term 'vector' for a fixed-length sequence of numbers. C++11 compounds this mistake by introducing a class 'array' that behaves similarly to ...
How to convert an ArrayList containing Integers to primitive int array?
I'm trying to convert an ArrayList containing Integer objects to primitive int[] with the following piece of code, but it is throwing compile time error. Is it possible to convert in Java?
...
Can a Byte[] Array be written to a file in C#?
I'm trying to write out a Byte[] array representing a complete file to a file.
8 Answers
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How to access array elements in a Django template?
I am getting an array arr passed to my Django template. I want to access individual elements of the array in the array (e.g. arr[0] , arr[1] ) etc. instead of looping through the whole array.
...
Why isn't std::initializer_list a language built-in?
...the simple reason that if you wrote a constructor for vector that takes an array then you could construct a vector from any array of the right type, not just one generated by the initializer list syntax. I'm not sure it would be a bad thing to construct containers from any array, but it's not the in...
Leaflet - How to find existing markers, and delete markers?
...var marker is erased by the latest. So one way to go is to create a global array of marker, and you add your marker in the global array.
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How do pointer to pointers work in C?
...t address 60.
As to why one uses pointers to pointers:
The name of an array usually yields the address of its first element. So if the array contains elements of type t, a reference to the array has type t *. Now consider an array of arrays of type t: naturally a reference to this 2D array will...