libphonenumber-js/es6/findNumbers/util.js

A simpler (and smaller) rewrite of Google Android's libphonenumber library in javascript

/** 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 "{".concat(lower, ",").concat(upper, "}");
}
/**
 * Trims away any characters after the first match of {@code pattern} in {@code candidate},
 * returning the trimmed version.
 */

export function trimAfterFirstMatch(regexp, string) {
  var 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;
}
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