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Difference between two dates in MySQL
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SELECT TIMESTAMPDIFF(HOUR,NOW(),'2013-05-15 10:23:23')
calculates difference in hour.(for days--> you have to define day replacing hour
SELECT DATEDIFF('2012-2-2','2012-2-1')
SELECT TO_DAYS ('2012-2-2')-TO_DAYS('2012-2-1')
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How to set the authorization header using curl
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Many API now use header authorization tokens. The -H option is great.
– eliocs
Nov 23 '12 at 17:45
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Any implementation of Ordered Set in Java?
...urque: good find, and thanks for the edits. OP wanted access by index, and now that I's looked at it and think about it, I think skip lists actually don't have that capability either...
– Michael Borgwardt
Jul 7 '15 at 8:01
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How to call a function from a string stored in a variable?
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A few years late, but this is the best manner now imho:
$x = (new ReflectionFunction("foo"))->getClosure();
$x();
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How to enable mod_rewrite for Apache 2.2
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a2enmod rewrite
and then:
service apache2 restart
mod_rewrite will now be enabled!
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What does it mean by select 1 from table?
...not to).
EDIT
There actually is one case which I forgot about until just now. In the case where you are trying to determine existence of a value in the database from an outside language, sometimes SELECT 1 FROM TABLE_NAME will be used. This does not offer significant benefit over selecting an indi...
How to import the class within the same directory or sub directory?
...in order to import classes from files within the same directory, you would now write in Python 3:
from .user import User
from .dir import Dir
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How to list all functions in a Python module?
...e you actually get a dict containing functionName:<function> and you now have the ability to CALL that function dynamically. good times!
– jsh
Jan 28 '11 at 21:31
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Undo working copy modifications of one file in Git?
... ic thanks for clearing that up. everyone just assumes you know what -- means when they show you examples. and its not something you can google easily too.
– Patoshi パトシ
Mar 4 '15 at 18:05
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How do I add a delay in a JavaScript loop?
...se(res => setTimeout(res, ms)); }
Reference on MDN
While ES7 is now supported by NodeJS and modern browsers, you might want to transpile it with BabelJS so that it runs everywhere.
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