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How to compare two colors for similarity/difference
... to a variable color, and with what percentage. The thing is that I don't know how to do that manually step by step. So it is even more difficult to think of a program.
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What is the difference between JOIN and UNION?
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UNION puts lines from queries after each other, while JOIN makes a cartesian product and subsets it -- completely different operations. Trivial example of UNION:
mysql> SELECT 23 AS bah
-> UNION
-> SELECT 45 AS bah;
+-----+
| bah |
+-----+
| 23 |
| 45 |
+-----+
2 ...
How to initialize a dict with keys from a list and empty value in Python?
I'd like to get from this:
6 Answers
6
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Get first n characters of a string
...tring = substr($string,0,10).'...';
Update:
Based on suggestion for checking length (and also ensuring similar lengths on trimmed and untrimmed strings):
$string = (strlen($string) > 13) ? substr($string,0,10).'...' : $string;
So you will get a string of max 13 characters; either 13 (or les...
IllegalArgumentException or NullPointerException for a null parameter? [closed]
...PointerException ? From the javadocs, both seem appropriate. Is there some kind of an understood standard? Or is this just one of those things that you should do whatever you prefer and both are really correct?
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StringBuilder vs String concatenation in toString() in Java
...ver.
More importantly given we have only 3
properties it might not make a
difference, but at what point do you
switch from concat to builder?
At the point where you're concatenating in a loop - that's usually when the compiler can't substitute StringBuilder by itself.
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How do I change the working directory in Python?
cd is the shell command to change the working directory.
14 Answers
14
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The 'json' native gem requires installed build tools
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I believe those installers make changes to the path. Did you try closing and re-opening the CMD window after running them and before the last attempt to install the gem that wants devkit present?
Also, be sure you are using the right devkit installer ...
If my interface must return Task what is the best way to have a no-operation implementation?
...the code below, due to the interface, the class LazyBar must return a task from its method (and for argument's sake can't be changed). If LazyBar s implementation is unusual in that it happens to run quickly and synchronously - what is the best way to return a No-Operation task from the method?
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disable nganimate for some elements
...this to your CSS. It is best if it is the last rule:
.no-animate {
-webkit-transition: none !important;
transition: none !important;
}
then add no-animate to the class of element you want to disable. Example:
<div class="no-animate"></div>
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