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jkubicek/gist:fe2dbc7ad583ffacf2b6

Last active August 29, 2015 14:12
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Swift nil-check compound assignment operator.
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gistfile1.swift
infix operator ??= {}
func ??=<T>(inout optional: T?, value: T) {
if optional == nil {
optional = value
}
}
var id: Int? = nil
id ??= 1234
println(id!)
// 1234
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