Go Keyword range: Difference between revisions
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:Note that only a first identifier is declared, that is the ''index'' and not the value, as the intuition would suggest. See examples below:<br> | :Note that only a first identifier is declared, that is the ''index'' and not the value, as the intuition would suggest. See examples below:<br> | ||
</blockquote> | </blockquote> | ||
=Iterating over Indices= | |||
<pre> | <pre> | ||
var a [5]int | var a [5]int | ||
for i | for i := range a { | ||
// i is the index | // i is the index | ||
} | |||
</pre> | |||
=Iterating over Values= | |||
<pre> | |||
var a [5]int | |||
for i := range a { | |||
// i is the index | |||
} | |||
</pre> | |||
=Iterating over Indices and Values= | |||
<pre> | |||
var a [5]int | |||
for _, value := range a { | |||
// value is the value | // value is the value | ||
} | } | ||
</pre> | </pre> | ||
Revision as of 04:28, 28 March 2016
Internal
Overview
range keyword is used to iterate over arrays, slices, maps and variadic function arguments. It returns two values. On the first position is the index/kyes, and the second position is the value.
- Note that only a first identifier is declared, that is the index and not the value, as the intuition would suggest. See examples below:
Iterating over Indices
var a [5]int
for i := range a {
// i is the index
}
Iterating over Values
var a [5]int
for i := range a {
// i is the index
}
Iterating over Indices and Values
var a [5]int
for _, value := range a {
// value is the value
}