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How to sort in mongoose?
...e query.
The Model.find() implementation (at this version) does a sliding allocation of properties to handle optional params (which is what confused me!):
Model.find = function find (conditions, fields, options, callback) {
if ('function' == typeof conditions) {
callback = conditions;
co...
Draw a perfect circle from user's touch
...Hough Transform is a voting scheme. A two dimensional array of integers is allocated and all elements are set to zero. Each element corresponds to a single pixel in the image being analyzed. This array is referred to as the accumulator array since each element will accumulate information, votes, ind...
How to determine if an NSDate is today?
...me for the second date and compare:
NSCalendar * gregorian = [[NSCalendar alloc]
initWithCalendarIdentifier:NSGregorianCalendar];
NSDateComponents * components =
[gregorian components:
(NSYearCalendarUnit|NSMonthCalendarUnit|NSDayCalendarUnit)
...
Getting an object from an NSSet
...ck for whether it's in the NSSet) with:
MyObject *testObject = [[MyObject alloc] init];
testObject.objectID = 5; // for example.
// I presume your object has more properties which you don't need to set here
// because it's objectID that defines uniqueness (see isEqual: above)
MyObject *existin...
Passing an array by reference
How does passing a statically allocated array by reference work?
5 Answers
5
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What is the use of “ref” for reference-type variables in C#?
...e of the reference itself; that is, you cannot
use the same reference to allocate memory for a new class and have it
persist outside the block. To do that, pass the parameter using the
ref or out keyword.
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iPhone viewWillAppear not firing
... setting up the view controllers on the respective controller (right after allocation). From then on, it correctly called these methods on its child view controllers.
My hierarchy is like this:
window
UITabBarController (subclass of)
UIViewController (subclass of) // <-- manually ca...
Remove a string from the beginning of a string
...e changed for if (0 === strpos($str, $prefix)) to avoid unnecessary memory allocation while keeping the same readability :)
– xDaizu
Feb 1 '17 at 9:17
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Convert Enum to String
...eans that the value will be boxed and this will waste CPU resources on the allocation and on the garbage collection. If this is done a lot of time, Enum.GetName will have a much lower throughput than caching the values in a dictionary and looking for the name there.
– Ran
...
Create a string with n characters
...o the string.
*/
public String spaces( int spaces ) {
return CharBuffer.allocate( spaces ).toString().replace( '\0', ' ' );
}
Invoke using:
System.out.printf( "[%s]%n", spaces( 10 ) );
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