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JavaScript get element by name
...the plural in this method:
document.getElementsByName()
That returns an array of elements, so use [0] to get the first occurence, e.g.
document.getElementsByName()[0]
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When should I use the new keyword in C++?
... another class, it has to adjust the size of that other class). That's why arrays in C# are reference types. They have to be, because with reference types, we can decide at runtime how much memory to ask for. And the same applies here. Only arrays with constant size (a size that can be determined at...
Type List vs type ArrayList in Java [duplicate]
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Almost always List is preferred over ArrayList because, for instance, List can be translated into a LinkedList without affecting the rest of the codebase.
If one used ArrayList instead of List, it's hard to change the ArrayList implementation into a LinkedList ...
typeof for RegExp
...perty of a host object may be any String value except one of "Arguments", "Array", "Boolean", "Date", "Error", "Function", "JSON", "Math", "Number", "Object", "RegExp", and "String". The value of a [[Class]] internal property is used internally to distinguish different kinds of objects. Note that th...
How can I use numpy.correlate to do autocorrelation?
...results from -∞ to ∞, but you obviously can't store an infinitely long array. So it has to be clipped, and that is where the mode comes in. There are 3 different modes: full, same, & valid:
"full" mode returns results for every t where both a and v have some overlap.
"same" mode returns ...
Insertion Sort vs. Selection Sort
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SELECTION SORT Assume that there is array of numbers written in a particular/random fashion and lets say we are to arrange in increasing order..so, take one number at a time and replace them with the smallest no. available in the list. by doing this step we'll ...
How can I efficiently select a Standard Library container in C++11?
...provide a full initialization list (using the { ... } syntax), then use an array. It replaces the traditional C-array, but with convenient functions.
Otherwise, jump to question 4.
Question 4: Double-ended ?
If you wish to be able to remove items from both the front and back, then use a deque,...
Ruby get object keys as array
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hash = {"apple" => "fruit", "carrot" => "vegetable"}
array = hash.keys #=> ["apple", "carrot"]
it's that simple
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Is there a best practice for generating html with javascript
I'm calling a web service that returns an array of objects in JSON. I want to take those objects and populate a div with HTML. Let's say each object contains a url and a name.
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Test if number is odd or even
...if the last digit is an even number :
$value = "1024";// A Number
$even = array(0, 2, 4, 6, 8);
if(in_array(substr($value, -1),$even)){
// Even Number
}else{
// Odd Number
}
Or to make it faster, use isset() instead of array_search :
$value = "1024";// A Number
$even = array(0 => 1, 2 =&g...