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How to concatenate string variables in Bash
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It's specifically and only a plus-equals operator. That is, unlike Javascript, in Bash, echo $A+$B prints "X Y+Z"
– phpguru
Feb 13 '17 at 19:04
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Changing git commit message after push (given that no one pulled from remote)
I have made a git commit and subsequent push. I would like to change the commit message. If I understand correctly, this is not advisable because someone might have pulled from the remote repository before I make such changes. What if I know that no one has pulled?
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Batch script to delete files
...eak for the OP, but on my system there's no problem finding a path with %, and escaping with %% keeps the system from finding it.
– RonaldBarzell
Dec 7 '12 at 13:36
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Fatal error: Maximum execution time of 300 seconds exceeded
...ries (change path according to your installation)
open config.default.php and change value for $cfg['ExecTimeLimit'] to 0:
$cfg['ExecTimeLimit'] = 0;
This will resolve the issue for PhpMyAdmin imports.
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For i = 0, why is (i += i++) equal to 0?
...ation):
int i = 0;
i = i + i; // i=0 because the ++ is a postfix operator and hasn't been executed
i + 1; // Note that you are discarding the calculation result
What actually happens is more involved than that - take a look at MSDN, 7.5.9 Postfix increment and decrement operators:
The run-tim...
how to rotate a bitmap 90 degrees
There is a statement in android canvas.drawBitmap(visiblePage, 0, 0, paint);
10 Answers
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android layout: This tag and its children can be replaced by one and a compound drawable
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To expand on Romain Guy's answer, here is an example.
Before:
<LinearLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_marginTop="10dp"
android:padding="5dp" >
<TextView
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Setting environment variables via launchd.conf no longer works in OS X Yosemite/El Capitan/macOS Sie
...nv PRODUCTS_PATH /Users/mortimer/Projects/my_products
launchctl setenv ANDROID_NDK_HOME /Applications/android-ndk
launchctl setenv PATH $PATH:/Applications/gradle/bin
</string>
</array>
<key>RunAtLoad</key>
<true/>
</dict>
</plist>
You c...
What does “Splats” mean in the CoffeeScript tutorial?
... arguments. Splatted arguments can come either before, after, or between standard arguments:
(first, rest...) ->
(rest..., last) ->
(first, rest..., last) ->
In the first two cases, if the function receives 0-1 arguments, rest will be an empty array. In the last case, the function needs ...
How can bcrypt have built-in salts?
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This is bcrypt:
Generate a random salt. A "cost" factor has been pre-configured. Collect a password.
Derive an encryption key from the password using the salt and cost factor. Use it to encrypt a well-known string. Store the cost, salt, and cipher text...