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What is the use of the @ symbol in PHP?
...are places where the setup script gets called multiple times, so I have to test. What, if any, problem would there be in simply using @session_start(); ?
– Stephen R
Jul 16 '18 at 18:12
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ALTER TABLE to add a composite primary key
...er table parent drop column id;
ERROR 1025 (HY000): Error on rename of
'./test/#sql-a04_b' to './test/parent' (errno: 150).
If you want to drop a primary key that's being referenced by another table, you will have to drop the foreign key in that other table first. You can recreate that foreign k...
Which is best way to define constants in android, either static class, interface or xml resource?
...r that I'm having three different set of URLs to point development system, test server and live server. It's difficult to change URL whenever I want to give application for testing/live. so I planned to make it as configurable, so that application can get appropriate URL based on me build type confi...
How to initialize an array's length in JavaScript?
...rtain length by passing an integer to the Array constructor using the var test = new Array(4); syntax.
18 Answers
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Is it possible to get the iOS 5.1 SDK for Xcode 4.2 on Snow Leopard?
... terminal window to copy the folders.
Note,this hack will also work for latest iOS 6 SDK.
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Python: finding an element in a list [duplicate]
... (some people might find it debatable). It is very approachable for simple tests, e.g. comparisons on object attributes (which I need a lot):
el = [x for x in mylist if x.attr == "foo"][0]
Of course this assumes the existence (and, actually, uniqueness) of a suitable element in the list.
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Find object by id in an array of JavaScript objects
...irst value in the array, if an element in the array satisfies the provided testing function. Otherwise undefined is returned.
If you want to find its index instead, use findIndex():
myArray.findIndex(x => x.id === '45');
From MDN:
The findIndex() method returns the index of the first e...
Calculating Distance between two Latitude and Longitude GeoCoordinates
I'm calculating the distance between two GeoCoordinates. I'm testing my app against 3-4 other apps. When I'm calculating distance, I tend to get an average of 3.3 miles for my calculation whereas other apps are getting 3.5 miles. It's a big difference for the calculation I'm trying to perform. Are t...
Wait for a process to finish
...ect if the process is running to replace the kill -0 $pid call. On Linux, test -d "/proc/$pid" works, on other systems you might have to use pgrep (if available) or something like ps | grep "^$pid ".
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Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
... and type-safe design. Such benefits come at a price, and you've written a test which makes these costs dominate the execution time.
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