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NSString property: copy or retain?
...Name = [NSMutableString stringWithString:@"Chris"];
Person *p = [[[Person alloc] init] autorelease];
p.name = someName;
[someName setString:@"Debajit"];
The current value of the Person.name property will be different depending on whether the property is declared retain or copy — it will be @"D...
How to delete all Annotations on a MKMapView
...tion = [mapView userLocation];
NSMutableArray *pins = [[NSMutableArray alloc] initWithArray:[mapView annotations]];
if ( userLocation != nil ) {
[pins removeObject:userLocation]; // avoid removing user location off the map
}
[mapView removeAnnotations:pins];
[pins releas...
What and When to use Tuple? [duplicate]
...know about the Tuple type. Tuple is a class, not a struct. It thus will be allocated upon the managed heap. Each class instance that is allocated adds to the burden of garbage collection.
Note:
The properties Item1, Item2, and further do not have setters. You cannot assign them. The Tuple is immuta...
How to replace part of string by position?
.... The StringBuilder approach avoid this extra cost by working within a pre-allocated section of memory and moving chars round within it.
– redcalx
Apr 17 '18 at 15:52
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How can one use multi threading in PHP applications
Is there a realistic way of implementing a multi-threaded model in PHP whether truly, or just simulating it. Some time back it was suggested that you could force the operating system to load another instance of the PHP executable and handle other simultaneous processes.
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using jquery $.ajax to call a PHP function
This may be a simple answer, but I'm using jQuery's $.ajax to call a PHP script. What I want to do is basically put that PHP script inside a function and call the PHP function from javascript.
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PHP “php://input” vs $_POST
I have been directed to use the method php://input instead of $_POST when interacting with Ajax requests from JQuery. What I do not understand is the benefits of using this vs the global method of $_POST or $_GET .
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error_log per Virtual Host?
On one Linux Server running Apache and PHP 5, we have multiple Virtual Hosts with separate log files. We cannot seem to separate the php error_log between virtual hosts.
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How to resolve “must be an instance of string, string given” prior to PHP 7?
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Prior to PHP 7 type hinting can only be used to force the types of objects and arrays. Scalar types are not type-hintable. In this case an object of the class string is expected, but you're giving it a (scalar) string. The error messa...
Fatal error: Class 'ZipArchive' not found in
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For the ZipArchive class to be present, PHP needs to have the zip extension installed.
See this page for installation instructions (both Linux and Windows).
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