:sig
String sha1(String s, bool as_binary = false)

:params
s : data to be hashed
as_binary : when set to false, returns hash in hexadecimal notation (defaults to false)
return value : the resulting hash value

:desc
Returns the sha1 hash of 's'.

:see
>noise

:related
**PHP:** `sha1()`
**JavaScript / Node.js:** Node `crypto.createHash("sha1")` or browser `SubtleCrypto` wrappers