s="binding"><span id="string/check-set" class="binding-sym">string/check-set</span> <span class="binding-type">cfunction</span> <span class="binding-type"><a href="https://github.com/janet-lang/janet/blob/a0ddfcb/src/core/string.c#L466">source</a></span> <pre class="binding-text">(string/check-set set str)

Checks that the string str only contains bytes that appear in the string set. Returns true if all bytes in str appear in set, false if some bytes in str do not appear in set.</pre><a href="https://janetd