--- /dev/null
+var ceil = Math.ceil;
+var floor = Math.floor;
+
+// `ToInteger` abstract operation
+// https://tc39.github.io/ecma262/#sec-tointeger
+module.exports = function (argument) {
+ return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor : ceil)(argument);
+};