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Where to store global constants in an iOS application?
...
In my testing, static const constants are not usable in the debugger (Xcode's lldb). "error: use of undeclared identifier .."
– jk7
Apr 4 at 2:18
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Useful GCC flags for C
...e mine:
-Wextra, -Wall: essential.
-Wfloat-equal: useful because usually testing floating-point numbers for equality is bad.
-Wundef: warn if an uninitialized identifier is evaluated in an #if directive.
-Wshadow: warn whenever a local variable shadows another local variable, parameter or global v...
Differences between socket.io and websockets
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Network traffic
To see the difference in network traffic you can run my test. Here are the results that I got:
WebSocket Results
2 requests, 1.50 KB, 0.05 s
From those 2 requests:
HTML page itself
connection upgrade to WebSocket
(The connection upgrade request is visible on the developer t...
Java and SQLite [closed]
...SQLite. Just add the JAR file to your classpath and import java.sql.*
His test app will create a database file, send some SQL commands to create a table, store some data in the table, and read it back and display on console. It will create the test.db file in the root directory of the project. You...
Backwards migration with Django South
...he bare "state" number - in this case 00xx - is enough. When improving and testing a migration you can have both commands in the history: forward (no argument), backward with previous state number.
– Tomasz Gandor
Feb 1 '13 at 9:14
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How do I create a MongoDB dump of my database?
... also possible to output the dump to an archive file:
mongodump --archive=test.archive --db database_name
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Find the most common element in a list
...t, reusable functionality, and lets you delegate some tricky logic to well-tested standard library components. Consider for example:
import itertools
import operator
def most_common(L):
# get an iterable of (item, iterable) pairs
SL = sorted((x, i) for i, x in enumerate(L))
# print 'SL:', S...
How to get current working directory in Java?
...ardless where the .class or .jar file the .class file is in.
public class Test
{
public static void main(final String[] args)
{
final String dir = System.getProperty("user.dir");
System.out.println("current dir = " + dir);
}
}
if you are in /User/me/ and your .jar fi...
What is the Swift equivalent to Objective-C's “@synchronized”?
..., but works as a replacement:
let serialQueue = DispatchQueue(label: "com.test.mySerialQueue")
serialQueue.sync {
// code
}
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Functional programming - is immutability expensive? [closed]
...sing primitives, which may have to be boxed/unboxed. You're not trying to test the overhead of wrapping primitive objects, you're trying to test immutability.
You've chosen an algorithm where in-place operation is unusually effective (and provably so). If you want to show that there exist algorith...