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December 15, 2015 13:58
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Алфавитная сортировка с разделением в объекты по первой букве
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function sortByLetter( array ) { | |
var length = array.length, | |
groups = {}, | |
item, | |
firstChar; | |
for ( var i = 0; i < length; i ++ ) { | |
item = array[ i ], | |
firstChar = item.charAt( 0 ); | |
groups[ firstChar ] = groups[ firstChar ] || []; | |
groups[ firstChar ].push( item ); | |
} | |
return groups; | |
} |
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Обновил для лучшей производительности.