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Allowed characters in Linux environment variable names
...ames shall not contain
the character '='. For values to be
portable across systems conforming to
IEEE Std 1003.1-2001, the value shall
be composed of characters from the
portable character set (except NUL
and as indicated below).
So names may contain any character except = and NUL, but...
Quickly create a large file on a Linux system
...
dd from the other answers is a good solution, but it is slow for this purpose. In Linux (and other POSIX systems), we have fallocate, which uses the desired space without having to actually writing to it, works with most modern disk based file systems, very fast:
For example:
fallocate -l 10G gen...
Keyboard Interrupts with python's multiprocessing Pool
...ever returns, so the interrupt never happens. KeyboardInterrupt should almost certainly interrupt a condition wait.
Note that this doesn't happen if a timeout is specified; cond.wait(1) will receive the interrupt immediately. So, a workaround is to specify a timeout. To do that, replace
res...
Go naming conventions for const
... whether you want to export the constant.
A few examples:
md5.BlockSize
os.O_RDONLY is an exception because it was borrowed directly from POSIX.
os.PathSeparator
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Add st, nd, rd and th (ordinal) suffix to a number
...etDaySuffix(num)
{
var array = ("" + num).split("").reverse(); // E.g. 123 = array("3","2","1")
if (array[1] != "1") { // Number is in the teens
switch (array[0]) {
case "1": return "st";
case "2": return "nd";
case "3": return "rd";
}
...
Warning: push.default is unset; its implicit value is changing in Git 2.0
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The motive is that, empirically, most expect the new default behavior
– Blake Miller
Jun 15 '13 at 18:53
125
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Get Folder Size from Windows Command Line
...
123
You can just add up sizes recursively (the following is a batch file):
@echo off
set size=0
fo...
Sending command line arguments to npm script
...
123
-- --args holy crap that's weird but okay
– aug
Feb 24 '17 at 0:14
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Where and why do I have to put the “template” and “typename” keywords?
...}; /* (C) --> */ f_tmpl<X> ();
struct Y { static int const foo = 123; }; /* (D) --> */ f_tmpl<Y> ();
The two different scenarios:
If we instantiate the function-template with type X, as in (C), we will have a declaration of a pointer-to int named x, but;
if we instantiate the ...
How to use a variable to specify column name in ggplot
... whoever heard of ensym() before? BIG SIGH
– CoderGuy123
Jun 4 '19 at 14:37
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