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What's a concise way to check that environment variables are set in a Unix shell script?
...by the wayside. But if you come across a script that starts with a colon, now you will know why.
Position of double quotes
blong asked in a comment:
Any thoughts on this discussion? https://github.com/koalaman/shellcheck/issues/380#issuecomment-145872749
The gist of the discussion is:
… Howe...
jquery data selector
... @J-P: Very sweet, I knew I could count on you! Headed to bed now, but I'll try it out tomorrow. Is it possible to do OR operations as well? I don't need it, just curious.
– Tauren
May 24 '10 at 10:34
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How to change MySQL data directory?
...r reload
Restart MySQL with the command:
sudo /etc/init.d/mysql restart
Now login to MySQL and you can access the same databases you had before.
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How to format a JavaScript date
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Use the date.format library:
var dateFormat = require('dateformat');
var now = new Date();
dateFormat(now, "dddd, mmmm dS, yyyy, h:MM:ss TT");
returns:
Saturday, June 9th, 2007, 5:46:21 PM
dateformat on npm
http://jsfiddle.net/phZr7/1/
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Unlink of file failed
...was not friendly to systems that cannot remove files that are open.
They now close the packs before doing so.
That fixes git-for-widows issue 500.
Looking at the test used to validate that new approach, a possible workaround (since Git 2.8 is not yet out) would be to raise artificially gc.autoP...
How to prevent sticky hover effects for buttons on touch devices
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This is now widely supported in mobile browsers, and works like a charm. I think it should be the accepted answer.
– Trevor Burnham
May 28 '19 at 2:20
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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
... will leave it up to him to figure it out. I don't have such a processor.
Now, on my machine I don't get this 256 byte boundary effect. Only the function and the loop alignment kicks in on my machine. If I pass g++ -O2 -falign-functions=16 -falign-loops=16 then everything is back to normal: I alway...
What does it mean to inflate a view from an xml file?
...iews:
RelativeLayout rel = new RelativeLayout();
rel.addView(but);
And now if we want to add a button in the right-corner and a textview on the bottom, we have to do a lot of work. First by instantiating the view properties and then applying multiple constraints. This is time consuming.
Android...
Two-way encryption: I need to store passwords that can be retrieved
...ime to show you different instances will still properly decrypt the data.
Now, how does it work/why use it over another solution:
Keys
The keys are not directly used. Instead, the key is stretched by a standard PBKDF2 derivation.
The key used for encryption is unique for every encrypted block ...
Display date/time in user's locale format and time offset
...k if you want the date to look the same across browsers. Any alternatives known?
– Josh Mc
Feb 12 '14 at 4:13
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