backend v4 half

SerpentRace_Backend/node_modules/libphonenumber-js/source/findNumbers/util.js

@@ -0,0 +1,33 @@
+/** Returns a regular expression quantifier with an upper and lower limit. */
+export function limit(lower, upper)
+{
+	if ((lower < 0) || (upper <= 0) || (upper < lower)) {
+		throw new TypeError()
+	}
+	return `{${lower},${upper}}`
+}
+
+/**
+ * Trims away any characters after the first match of {@code pattern} in {@code candidate},
+ * returning the trimmed version.
+ */
+export function trimAfterFirstMatch(regexp, string)
+{
+	const index = string.search(regexp)
+
+	if (index >= 0) {
+		return string.slice(0, index)
+	}
+
+	return string
+}
+
+export function startsWith(string, substring)
+{
+	return string.indexOf(substring) === 0
+}
+
+export function endsWith(string, substring)
+{
+	return string.indexOf(substring, string.length - substring.length) === string.length - substring.length
+}