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mas-higa 2018/03/27
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mas-higa 2018/01/10
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mas-higa 2017/01/06
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math

algorithm
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mas-higa 2013/06/14
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mas-higa 2011/10/07
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mas-higa 2011/07/06
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mas-higa 2011/05/10
security

passwd

hash
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mas-higa 2011/01/25
ruby

hash

algorithm

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Select from a Hash by value
Say, we have a Hash with codes for colors: COLOR = { :red => 1, :white => 2, :black => 3, :yellow => 4 } â€¦and we want to check which color belongs to number 3. COLOR.invert[3] #=> :black This tip uses Hash#invert, which â€œreturns a new hash, created by using hshâ€˜s values as keys, and the keys as values.â€
mas-higa 2010/05/21
ruby

tips

hash

invert
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mas-higa 2008/09/08
vb

hash
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1