# `string.camelToHyphen()` _(ext/string\_/camel-to-hyphen)_ Convert camelCase string to hyphen separated, e.g. `oneTwoThree` into `one-to-three`. Useful when converting names from js property convention into filename convention. ```javascript const camelToHyphen = require("ext/string_/camelToHyphen"); camelToHyphen.call("razDwaTrzy"); // raz-dwa-trzy ```