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What's the difference between == and .equals in Scala?
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204
You normally use ==, it routes to equals, except that it treats nulls properly. Reference equa...
Remote branch is not showing up in “git branch -r”
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Peter Mortensen
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answered Sep 7 '12 at 15:17
kankan
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Swift Programming: getter/setter in stored property
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edited Jan 28 '16 at 2:13
Andrew
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Why use symbols as hash keys in Ruby?
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229
TL;DR:
Using symbols not only saves time when doing comparisons, but also saves memory, becau...
How to get the max of two values in MySQL?
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Use GREATEST()
E.g.:
SELECT GREATEST(2,1);
Note: Whenever if any single value contains null at that time this function always returns null (Thanks to user @sanghavi7)
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How to exclude file only from root folder in Git
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612
From the documentation:
If the pattern does not contain a slash /, git treats it as a shell glo...
Understanding the ngRepeat 'track by' expression
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e.g.: $scope.dataSource: [{id:1,name:'one'}, {id:1,name:'one too'}, {id:2,name:'two'}]
You can't iterate this collection while using 'id' as identifier (duplicate id:1).
WON'T WORK:
<element ng-repeat="item.id as item.name for item in dataSource">
// something with item ...
</elemen...
How to show line number when executing bash script
...or example, if your script reads:
$ cat script
foo=10
echo ${foo}
echo $((2 + 2))
Executing it thus would print line numbers:
$ PS4='Line ${LINENO}: ' bash -x script
Line 1: foo=10
Line 2: echo 10
10
Line 3: echo 4
4
http://wiki.bash-hackers.org/scripting/debuggingtips gives the ultimate PS4 t...
How to check if an intent can be handled from some activity?
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edited Mar 16 '17 at 11:28
Ziem
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answered May 1...
What are the minimum margins most printers can handle?
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Every printer is different but 0.25" (6.35 mm) is a safe bet.
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