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What does |= (single pipe equal) and &=(single ampersand equal) mean
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3 Answers
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Sourcemaps off by one line in Chrome, with Ruby on Rails, Webpack, and React JS
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There was a bug in chrome, try the latest version, also on your webpack config try using differe...
How do I get SUM function in MySQL to return '0' if no values are found?
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Use COALESCE to avoid that outcome.
SELECT COALESCE(SUM(column),0)
FROM table
WHERE ...
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Getting value of public static final field/property of a class in Java via reflection
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What's the false operator in C# good for?
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edited Aug 19 '15 at 13:06
Anton Gogolev
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Get current value of a setting in Vim
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389
Add a ? mark after the setting name and it will show the value
:set expandtab?
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Getting exact error type in from DbValidationException
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378
While you are in debug mode within the catch {...} block open up the "QuickWatch" window (ctrl...
How do I revert master branch to a tag in git?
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edited Apr 11 '13 at 8:07
answered Jul 29 '11 at 11:31
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Multiple commands on a single line in a Windows batch file
.../v:on /c "echo !time! & ping 127.0.0.1 >nul: & echo !time!"
15:23:36.77
15:23:39.85
That's needed from the command line. If you're doing this inside a script, you can just use setlocal:
@setlocal enableextensions enabledelayedexpansion
@echo off
echo !time! & ping 127.0.0.1 >nul...
Validate uniqueness of multiple columns
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