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How can I look up the value of a map by using a variable key without iterating?
So one can lookup a constant key on variable map $x with $x.key1, but is it possible to do amap.$key?
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You can retrieve the value assigned to a key in a map using the syntax m[key] . If the key exists in the map, you'll get the assigned value. Otherwise, you'll get the zero value of the map's value type.
In Go language, a map is a powerful, ingenious, and versatile data structure. Golang Maps is a collection of unordered pairs of key-value. It is widely used because it provides fast lookups and values that can retrieve, update or delete with the help of keys. It is a reference to a hash table.
You use the index function:
{{index .Amap "key1"}} index Returns the result of indexing its first argument by the following arguments. Thus "index x 1 2 3" is, in Go syntax, x[1][2][3]. Each indexed item must be a map, slice, or array. https://golang.org/pkg/text/template#hdr-Functions
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