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How to unmount a busy device
...s open for writing on the original as each mounted instance is
# checked. https://unix.stackexchange.com/a/386570/143394
# So, avoid remount, and bind mount instead:
sudo mount -o bind,ro "$original" "$original_duplicate"
# Don't propagate/mirror the empty directory just about hide the original
su...
Git interoperability with a Mercurial Repository
...ble, and that's it, no dependencies (other than Mercurial):
git clone hg::https://www.mercurial-scm.org/repo/hg/
You should be able to push and pull from it as if it was a native Git repository.
When you push new Git branches, Mercurial bookmarks will be created for them.
See the git-remote-hg ...
How to validate an email address in PHP
...
Answered this in 'top question' about emails verification https://stackoverflow.com/a/41129750/1848217
For me the right way for checking emails is:
Check that symbol @ exists, and before and after it there are some non-@ symbols: /^[^@]+@[^@]+$/
Try to send an email to...
Most efficient way to increment a Map value in Java
...
A little research in 2016: https://github.com/leventov/java-word-count, benchmark source code
Best results per method (smaller is better):
time, ms
kolobokeCompile 18.8
koloboke 19.8
trove 20.8
fastutil 22...
Is it possible to use a div as content for Twitter's Popover
... input.
What you want to do is load the object itself into the popover.
https://jsfiddle.net/shrewmouse/ex6tuzm2/4/
HTML:
<h1> Test </h1>
<div><button id="target">click me</button></div>
<!-- This will be the contents of our popover -->
<div class=...
Can I have multiple Xcode versions installed?
...s evangelist have the full details (Apple dev username/password required):
https://devforums.apple.com/message/40847#40847
Then grab yourself a custom icon for the Beta version of XCode you're using, so you can tell them apart in the dock:
http://iphonedevelopment.blogspot.com/2009/03/multiple-deve...
Mac OS X - EnvironmentError: mysql_config not found
...es you making a few changes
step 1: Download MySql if not already done so https://dev.mysql.com/downloads/
Step 2: Locate it relative to Macintosh HD and cd
/usr/local/mysql/bin
Step 3: Once there open terminal and use a text editor of choice - I'm a neovim guy myself so I typed (doesn't autom...
Using the HTML5 “required” attribute for a group of checkboxes?
...th === 0 ? 'Choose one' : '');
}
$('#submit').click(verifyPaymentType);
https://jsfiddle.net/oywLo5z4/
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How do I add a foreign key to an existing SQLite table?
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Please check https://www.sqlite.org/lang_altertable.html#otheralter
The only schema altering commands directly supported by SQLite are the
"rename table" and "add column" commands shown above. However,
applications can make other ...
Can you control how an SVG's stroke-width is drawn?
...rst and then fill second, and get the desired effect.
MDN on paint-order: https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/paint-order
CSS code:
paint-order: stroke;
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