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NickAger/sub.swift

Last active November 8, 2017 15:54
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Understanding Swifts substringToIndex & substringFromIndex
Raw
sub.swift
"hello".substringToIndex(1) // "h"
// s.substringToIndex(1) // String may not be indexed with 'Int', it has variable size elements
s.substringToIndex(s.startIndex.advancedBy(1)) // "h"
s.substringFromIndex(s.startIndex.advancedBy(1)) // "ello"
s.substringFromIndex(s.endIndex.advancedBy(-1)) // "o"
s.substringToIndex(s.endIndex.advancedBy(-1)) // "hell"
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