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The differences between .build, .create, and .create! and when should they be used?
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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
...hese are legal:
h = { :$in => array }
h = { :'a.b' => 'c' }
h[:s] = 42
but these are not:
h = { $in: array }
h = { 'a.b': 'c' } # but this is okay in Ruby2.2+
h[s:] = 42
You can also use anything as a key with => so you can do this:
h = { C.new => 11 }
h = { 23 => 'pancakes hou...
How do I apply CSS3 transition to all properties except background-position?
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145
Here's a solution that also works on Firefox:
transition: all 0.3s ease, background-position 1...
How to query nested objects?
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431
db.messages.find( { headers : { From: "reservations@marriott.com" } } )
This queries for docu...
How to check if a variable exists in a FreeMarker template?
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darckcrystale
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answered Nov 20 '08 at 20:25
Ulf LindbackUlf Lindback
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Shell script to delete directories older than n days
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401
This will do it recursively for you:
find /path/to/base/dir/* -type d -ctime +10 -exec rm -rf...
Does it make sense to do “try-finally” without “catch”?
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Taylor LeeseTaylor Leese
44.7k2727 gold badges102102 silver badges138138 bronze badges
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How do you use the Immediate Window in Visual Studio?
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}
Then in the Immediate Window you can type the following:
? GetSum(2, 4)
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As you can seen, this works really well for static methods. However, if the method is non-static then you need to interact with a reference to the object the method belongs to.
For example, let’s say this is what y...
How can I select every other line with multiple cursors in Sublime Text?
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Using Core Data, iCloud and CloudKit for syncing and backup and how it works together
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answered Jun 27 '14 at 15:55
Tom HarringtonTom Harrington
59.9k99 gold badges123123 silver badges146146 bronze badges
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