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for (var constructor of anyTypedArrayConstructors) {
// The third argument to %TypedArray%.from is passed as the 'this' value to the
// mapping function.
var hits = 0, obj = {};
function f(x) {
assertEq(this, obj);
hits++;
}
constructor.from(["a", "b", "c"], f, obj);
assertEq(hits, 3);
// Without an argument, undefined is passed...
hits = 0;
function gs(x) {
"use strict";
assertEq(this, undefined);
hits++;
}
constructor.from("def", gs);
assertEq(hits, 3);
// ...and if the mapping function is non-strict, that means the global is
// passed.
var global = this;
hits = 0;
function g(x) {
assertEq(this, global);
hits++;
}
constructor.from("ghi", g);
assertEq(hits, 3);
// A primitive value can be passed.
for (var v of [0, "str", undefined]) {
hits = 0;
var mapfn = function h(x) {
"use strict";
assertEq(this, v);
hits++;
};
constructor.from("pq", mapfn, v);
assertEq(hits, 2);
}
// ...and if the mapping function is non-strict, primitive values will
// be wrapped to objects.
for (var v of [0, "str", true]) {
hits = 0;
var mapfn = function h(x) {
assertDeepEq(this, Object(v));
hits++;
};
constructor.from("pq", mapfn, v);
assertEq(hits, 2);
}
}
if (typeof reportCompare === "function")
reportCompare(true, true);