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How to generate a random number between a and b in Ruby?
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Or
[*a..b].sample
Array#sample
Standard in Ruby 1.8.7+.
Note: was named #choice in 1.8.7 and renamed in later versions.
But anyway, generating array need resources, and solution you already wrote is the best, you can do.
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Check if all checkboxes are selected
...n:
$('.abc:checked').length == $('.abc').length
You could do it every time a new checkbox is checked:
$(".abc").change(function(){
if ($('.abc:checked').length == $('.abc').length) {
//do something
}
});
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Why does the Visual Studio editor show dots in blank spaces?
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Press Ctrl+R, Ctrl+W.
If you are using C# keyboard mappings: (thanks Simeon)
Press Ctrl+E, S.
If you want to use the menu: (thanks angularsen)
Edit > Advanced > View White Space
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What is an MDF file? [closed]
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For people like me: Q: what do the letters mean? A: MDF – It stands for Master Database File (datanumen.com/blogs/5-basic-facts-mdf-ldf-files-sql-server)
– Vasily Hall
May 22 '19 at 17:45
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Tools for creating Class Diagrams [closed]
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Experimenting it and it's really nice and clean! The login is pretty straight forward with g+ account. +1 for sure! :)
– Ian Medeiros
Apr 4 '13 at 18:25
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What do the icons in Eclipse mean?
I just came to SO looking for this, didn't find it, and found it on my own elsewhere. But I thought it would be good for SO to have the answer for future reference; I wondered about them all the time when I was new to Eclipse (this was before I discovered SO).
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Oracle SQL, concatenate multiple columns + add text
... This is so ugly, with respect to an very old-brand DBMS. How come Oracle don't suppoer many-argument-version Concat? However, thanks to Shankar, there's a || operator.
– Scott Chu
Aug 3 '17 at 2:31
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How to initialize array to 0 in C?
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char ZEROARRAY[1024];
at global scope it will be all zeros at runtime. But actually there is a shorthand syntax if you had a local array. If an array is partially initialized, elements that are not initialized receive the value 0 of the appropriate type. You could write:
char ZEROARRAY[1024...
Is there a repo where you can download android virtual devices? [closed]
...fairly representative set of devices emulated now. Pull requests are welcome.
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Loop through a Map with JSTL [duplicate]
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Note to others: do not try to name var in forEach loop "param"
– user11153
Mar 6 '14 at 9:59
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