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Why does javascript map function return undefined?
... to map one value to another, but it looks you actually want to filter the array, which a map function is not suitable for.
What you actually want is a filter function. It takes a function that returns true or false based on whether you want the item in the resulting array or not.
var arr = ['a',...
Restful way for deleting a bunch of items
... you think about the list of entities as an entity itself (even if of type array), sending a partial array (only the ids you want to update) of partial entities, then you can leave out the query string, thus not having an URL representing more than one entity.
– Szabolcs Páll
...
How can I get useful error messages in PHP?
...----------------------------------
function ShutdownHandler()
{
if(@is_array($error = @error_get_last()))
{
return(@call_user_func_array('ErrorHandler', $error));
};
return(TRUE);
};
register_shutdown_function('ShutdownHandler');
// ----------------------------------------...
from list of integers, get number closest to a given value
...
If the list is already sorted, or you could pay the price of sorting the array once only, use the bisection method illustrated in @Lauritz's answer which only takes O(log n) time (note however checking if a list is already sorted is O(n) and sorting is O(n log n).)
...
Picking a random element from a set
... If the set is not mutated over multiple accesses, you can copy it into an array and then access O(1). Just use myHashSet.toArray()
– ykaganovich
Jul 21 '10 at 20:23
2
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jQuery callback for multiple ajax calls
...ce $.when expects all of the ajax requests as sequential arguments (not an array) you'll commonly see $.when used with .apply() like so:
// Save all requests in an array of jqXHR objects
var requests = arrayOfThings.map(function(thing) {
return $.ajax({
method: 'GET',
url: 'thin...
Method Overloading for null argument
...find the most specific one.
Since Object is the super-type of char[], the array version is more specific than the Object-version. So if only those two methods exist, the char[] version will be chosen.
When both the char[] and Integer versions are available, then both of them are more specific than...
hexadecimal string to byte array in python
...f values of different types. I wish to convert this Hex String into a byte array so that I can shift each value out and convert it into its proper data type.
...
Reflection: How to Invoke Method with parameters
...hodInfo" to "classInstance", just like in the call with the null parameter array.
result = methodInfo.Invoke(classInstance, parametersArray);
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Difference between JSON.stringify and JSON.parse
...ived as JSON.
JSON.stringify() is to create a JSON string out of an object/array.
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