(starts-with? s substr)
True if s starts with substr.
(ns tst.xyz.core
(:use clojure.test )
(:require [clojure.string :as str] ))
(deftest t-starts-with?
(is (str/starts-with? "abcde" "a"))
(is (str/starts-with? "abcde" "ab"))
(is (str/starts-with? "abcde" "abc"))
(is (not (str/starts-with? "abcde" "b")))
(is (not (str/starts-with? "abcde" "bc")))
(is (not (str/starts-with? "a" "ab")))
(is (not (str/starts-with? "ab" "abc"))))