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Find and restore a deleted file in a Git repository
...he specified commit, so ~1 is the commit before, ~2 is two commits before, etc
– Nils Luxton
Sep 10 '12 at 15:07
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Defining a variable with or without export
... process. You would use this for (say) loop variables, temporary variables etc.
It's important to note that exporting a variable doesn't make it available to parent processes. That is, specifying and exporting a variable in a spawned process doesn't make it available in the process that launched it...
Why does InetAddress.isReachable return false, when I can ping the IP address?
...achine
// openPort = 22 - ssh, 80 or 443 - webserver, 25 - mailserver etc.
try {
try (Socket soc = new Socket()) {
soc.connect(new InetSocketAddress(addr, openPort), timeOutMillis);
}
return true;
} catch (IOException ex) {
return false;
}...
How can I dynamically add a directive in AngularJS?
...t I can now use Angular Bootstrap directives like datepicker, alert, tabs, etc. Apparently I msssed something up and right now it's only working in Chrome though: embed.plnkr.co/WI16H7Rsa5adejXSmyNj/preview
– JoshGough
Jun 30 '13 at 19:31
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What is more efficient: Dictionary TryGetValue or ContainsKey+Item?
...ng out that the actual source is available now. none of the other answers/etc had a link to the actual source :D
– John Gardner
Jun 3 '16 at 17:32
1
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Meaning of “[: too many arguments” error from if [] (square brackets)
...owever, and so may not be compatible with default shells called by /bin/sh etc.
This means on some systems, it might work from the console but not when called elsewhere, like from cron, depending on how everything is configured.
It would look like this:
VARIABLE=$(/some/command);
if [[ $VARIABL...
Debug vs. Release performance
...oven to be invariants
code written under #debug directive is not included, etc.
The rest is up to the JIT.
Full list of optimizations here courtesy of Eric Lippert.
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How to split a string in Java
...h needs regular expression construction and matching. Extra array created, etc.
– David
Jan 17 '19 at 23:38
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Print only?
...or simple pages, but with more advanced customizations (menus, slideshows, etc.) it could erase some dynamic behaviors added by other scripts.
– Christophe
Nov 6 '12 at 18:31
18
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Further understanding setRetainInstance(true)
...s the ID of the container view.
This strongly implies that if you do setContentView(R.layout.whatever) in Activity.onCreated() and that layout contains a fragment with setRetainInstance(true), then when the activity is recreated it will be searched for again using its id or tag.
Secondly, for ...