An input range of keys
An input range of values
A newly allocated associative array out of elements of the input range, which must be a range of tuples (Key, Value) or a range of keys and a range of values. If given two ranges of unequal lengths after the elements of the shorter are exhausted the remaining elements of the longer will not be considered. Returns a null associative array reference when given an empty range. Duplicates: Associative arrays have unique keys. If r contains duplicate keys, then the result will contain the value of the last pair for that key in r.
import std.range : repeat, zip; import std.typecons : tuple; import std.range.primitives : autodecodeStrings; auto a = assocArray(zip([0, 1, 2], ["a", "b", "c"])); // aka zipMap static assert(is(typeof(a) == string[int])); assert(a == [0:"a", 1:"b", 2:"c"]); auto b = assocArray([ tuple("foo", "bar"), tuple("baz", "quux") ]); static assert(is(typeof(b) == string[string])); assert(b == ["foo":"bar", "baz":"quux"]); static if (autodecodeStrings) alias achar = dchar; else alias achar = immutable(char); auto c = assocArray("ABCD", true.repeat); static assert(is(typeof(c) == bool[achar])); bool[achar] expected = ['D':true, 'A':true, 'B':true, 'C':true]; assert(c == expected);
Returns a newly allocated associative array from a range of key/value tuples or from a range of keys and a range of values.