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How to negate the whole regex?
...:m{2}|t)$).*$
(?!(?:m{2}|t)$) is a negative lookahead; it says "starting from the current position, the next few characters are not mm or t, followed by the end of the string." The start anchor (^) at the beginning ensures that the lookahead is applied at the beginning of the string. If that suc...
Escape double quotes in a string
...still part of your string.
Check out Escape Sequences and String literals from MSDN.
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How can I make gdb save the command history?
...cord on exit is on.
size: The size of the command history is 100000000.
From the docs:
set history size size
set history size unlimited
Set the number of commands which GDB keeps in its history list. This defaults to the value of the environment variable HISTSIZE, or to 256 if this variab...
How to optimize imports automatically after each save in IntelliJ IDEA
...swer works, but there is also the Intellij "save actions" plugin available from the JetBrains plugin repository that does that (as well as other things): Intellij Save Actions Plugin.
Installation
File > Settings > Plugins > Browse repositories... > Search 'Save Actions' > Category ...
Space between two rows in a table?
...
From Mozilla Developer Network:
The border-spacing CSS property specifies the distance between the borders of adjacent cells (only for the separated borders model). This is equivalent to the cellspacing attribute in prese...
What is the proper way to check if a string is empty in Perl?
...
The very concept of a "proper" way to do anything, apart from using CPAN, is non existent in Perl.
Anyways those are numeric operators, you should use
if($foo eq "")
or
if(length($foo) == 0)
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Bash script processing limited number of commands in parallel
... shell would wait until those are completed before starting the next set.
From the GNU manual:
wait [jobspec or pid ...]
Wait until the child process specified by each process ID pid or job specification jobspec exits and return the exit status of the last
command waited for. If a job spe...
return query based on date
...ives us current time in milliseconds
We want to subtract 5 minutes (in ms) from that: 5*60*1000 -- I just multiply by 60 seconds so its easy to change. I can just change 5 to 120 if I want 2 hours (120 minutes).
new Date().getTime()-60*5*1000 gives us 1484383878676 (5 minutes ago in ms)
Now we nee...
How to check whether a file or directory exists?
...If I told you "Simple way to get rich quick: put money in bank. take money from bank." you would think I was telling you that there were two serial steps required rather than two alternative steps. The problem with this answer is that readers may not understand that you are suggesting two different...
Android Center text on canvas
...2)) ;
//((textPaint.descent() + textPaint.ascent()) / 2) is the distance from the baseline to the center.
canvas.drawText("Hello", xPos, yPos, textPaint);
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