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Math.random() explanation
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If you want double then just replace the ints with doubles (and the typecast is unnecessary). I assumed you wanted ints but I'll add to my post.
– AusCBloke
Nov 1 '11 at 2:40
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Best way to load module/class from lib folder in Rails 3?
...stuff loaded though they've had their autoload paths modified as required, then this answer tries to explain what is the magic behind this autoload thing.
So when it comes to loading stuff from subdirectories there's a gotcha or a convention you should be aware. Sometimes the Ruby/Rails magic (this...
Can “this” ever be null in Java?
...od and my first reaction was to ridicule the developer that wrote it.. But then, I figured I should make sure I was right first.
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Command prompt won't change directory to another drive
...her drive, you need to switch to that drive using :
C:\...\Admin> d:
then you can cd into the directory you want.
C:\...\Admin> d:
D:\>cd "Docs\Java"
D:\Docs\Java>
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TSQL Pivot without aggregate function
...hy !!??
Select CustomerID,
Min(Case DBColumnName When 'FirstName' Then Data End) FirstName,
Min(Case DBColumnName When 'MiddleName' Then Data End) MiddleName,
Min(Case DBColumnName When 'LastName' Then Data End) LastName,
Min(Case DBColumnName When 'Date' Then Data End) Date
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How to use protractor to check if an element is visible?
...ity of an element:
element(by.className('your-class-name')).isDisplayed().then(function (isVisible) {
if (isVisible) {
// element is visible
} else {
// element is not visible
}
});
However, you don't need this if you are just checking the visibility of the element (as...
What does $.when.apply($, someArray) do?
...ch element as a parameter (and makes sure the this is set to jQuery/$), so then it all works :-)
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What does auto do in margin:0 auto?
...ore, to give you an example, if the parent is 100px and the child is 50px, then the auto property will determine that there's 50px of free space to share between margin-left and margin-right:
var freeSpace = 100 - 50;
var equalShare = freeSpace / 2;
Which would give:
margin-left:25;
margin-ri...
How to check if running as root in a bash script
... UID is 0. Use something like this in your script:
if [ "$EUID" -ne 0 ]
then echo "Please run as root"
exit
fi
Note: If you get 2: [: Illegal number: check if you have #!/bin/sh at the top and change it to #!/bin/bash.
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How to print the contents of RDD?
...use issues. I think the best option is to write in multiple files in HDFS, then use hdfs dfs --getmerge in order to merge the files
– Oussama
Jul 21 '15 at 16:10
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