Created
November 6, 2012 22:54
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ri 'Array#<=>' | |
= Array#<=> | |
(from ruby site) | |
------------------------------------------------------------------------------ | |
ary <=> other_ary -> -1, 0, +1 or nil | |
------------------------------------------------------------------------------ | |
Comparison---Returns an integer (-1, 0, or +1) if this array is less than, | |
equal to, or greater than other_ary. Each object in each | |
array is compared (using <=>). If any value isn't equal, then that inequality | |
is the return value. If all the values found are equal, then the return is | |
based on a comparison of the array lengths. Thus, two arrays are ``equal'' | |
according to Array#<=> if and only if they have the same length and the value | |
of each element is equal to the value of the corresponding element in the | |
other array. | |
[ "a", "a", "c" ] <=> [ "a", "b", "c" ] #=> -1 | |
[ 1, 2, 3, 4, 5, 6 ] <=> [ 1, 2 ] #=> +1 |
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