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#ifdef vs #if - which is better/safer as a method for enabling/disabling compilation of particular s
... using #if, I can write this
DoSomethingSlowWithTimeout(DEBUG_ENABLED? 5000 : 1000);
... instead of ...
#ifdef DEBUG_MODE
DoSomethingSlowWithTimeout(5000);
#else
DoSomethingSlowWithTimeout(1000);
#endif
Second, you're in a better position if you want to migrate from a #define to a global...
How can I print the contents of a hash in Perl?
...e talking about). The for loop is faster than the while up to at least 10,000 keys: gist.github.com/151792
– Chas. Owens
Jul 22 '09 at 4:10
1
...
Format a number as 2.5K if a thousand or more, otherwise 900
...um) {
return Math.abs(num) > 999 ? Math.sign(num)*((Math.abs(num)/1000).toFixed(1)) + 'k' : Math.sign(num)*Math.abs(num)
}
console.log(kFormatter(1200)); // 1.2k
console.log(kFormatter(-1200)); // -1.2k
console.log(kFormatter(900)); // 900
console.log(kFormatter(-900)); // -900
...
navbar color in Twitter Bootstrap
... set a solid black background-color:
.navbar-inner {
background-color: #000; /* background color will be black for all browsers */
background-image: none;
background-repeat: no-repeat;
filter: none;
}
You can take advantage of such tools as the Colorzilla Gradient Editor and create your o...
Migration: Cannot add foreign key constraint
...Blueprint $table) {
// this line throw QueryException "SQLSTATE[HY000]: General error: 1215 Cannot add foreign key constraint..."
// $table->integer('user_id')->unsigned()->index();
$table->bigInteger('user_id')->unsigned()->index(); // this is working
...
Setting Objects to Null/Nothing after use in .NET
...uch time making the "perfect" algorithm, only to have it save 0.1ms in 100,000 iterations all while readability was completely shot.
– Brent Rittenhouse
Aug 3 '17 at 17:10
...
How to create a directory and give permission in single command
...odirectory and yostuff...to get around this we can use a subshell:
( umask 000 && mkdir -p yodirectory/yostuff/mastuffinyostuff )
and that's it. 777 perms for yostuff, mastuffinyostuff, and yodirectory.
share
...
Add centered text to the middle of a -like line
...rator::after {
content: '';
flex: 1;
border-bottom: 1px solid #000;
}
.separator::before {
margin-right: .25em;
}
.separator::after {
margin-left: .25em;
}
See http://jsfiddle.net/MatTheCat/Laut6zyc/ for demo.
Today the compatibility is not that bad (you can add all of old fle...
How to get the separate digits of an int number?
... toCharArray is MUCH faster than split. I just put both in a loop 1000 times and toCharArray took 20ms and split took 1021ms. I also did it mathematically using divide by ten with mod (%) and it took 50ms doing it that way, so toCharArray appears to be faster than the other two.
...
How to efficiently compare two unordered lists (not sets) in Python?
...ch, I get: 127 usec for sorted and 42 for Counter (about 3x faster). At 1,000 ints with 5 repeats, Counter is 4x faster. python3.6 -m timeit -s 'from collections import Counter' -s 'from random import shuffle' -s 't=list(range(100)) * 5' -s 'shuffle(t)' -s 'u=t[:]' -s 'shuffle(u)' 'Counter(t)==C...