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File Content: `trunc.js`

var baseToString = require('../internal/baseToString'),
    isIterateeCall = require('../internal/isIterateeCall'),
    isObject = require('../lang/isObject'),
    isRegExp = require('../lang/isRegExp');

/** Used as default options for `_.trunc`. */
var DEFAULT_TRUNC_LENGTH = 30,
    DEFAULT_TRUNC_OMISSION = '...';

/** Used to match `RegExp` flags from their coerced string values. */
var reFlags = /\w*$/;

/**
 * Truncates `string` if it's longer than the given maximum string length.
 * The last characters of the truncated string are replaced with the omission
 * string which defaults to "...".
 *
 * @static
 * @memberOf _
 * @category String
 * @param {string} [string=''] The string to truncate.
 * @param {Object|number} [options] The options object or maximum string length.
 * @param {number} [options.length=30] The maximum string length.
 * @param {string} [options.omission='...'] The string to indicate text is omitted.
 * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
 * @param- {Object} [guard] Enables use as a callback for functions like `_.map`.
 * @returns {string} Returns the truncated string.
 * @example
 *
 * _.trunc('hi-diddly-ho there, neighborino');
 * // => 'hi-diddly-ho there, neighbo...'
 *
 * _.trunc('hi-diddly-ho there, neighborino', 24);
 * // => 'hi-diddly-ho there, n...'
 *
 * _.trunc('hi-diddly-ho there, neighborino', {
 *   'length': 24,
 *   'separator': ' '
 * });
 * // => 'hi-diddly-ho there,...'
 *
 * _.trunc('hi-diddly-ho there, neighborino', {
 *   'length': 24,
 *   'separator': /,? +/
 * });
 * // => 'hi-diddly-ho there...'
 *
 * _.trunc('hi-diddly-ho there, neighborino', {
 *   'omission': ' [...]'
 * });
 * // => 'hi-diddly-ho there, neig [...]'
 */
function trunc(string, options, guard) {
  if (guard && isIterateeCall(string, options, guard)) {
    options = undefined;
  }
  var length = DEFAULT_TRUNC_LENGTH,
      omission = DEFAULT_TRUNC_OMISSION;

  if (options != null) {
    if (isObject(options)) {
      var separator = 'separator' in options ? options.separator : separator;
      length = 'length' in options ? (+options.length || 0) : length;
      omission = 'omission' in options ? baseToString(options.omission) : omission;
    } else {
      length = +options || 0;
    }
  }
  string = baseToString(string);
  if (length >= string.length) {
    return string;
  }
  var end = length - omission.length;
  if (end < 1) {
    return omission;
  }
  var result = string.slice(0, end);
  if (separator == null) {
    return result + omission;
  }
  if (isRegExp(separator)) {
    if (string.slice(end).search(separator)) {
      var match,
          newEnd,
          substring = string.slice(0, end);

      if (!separator.global) {
        separator = RegExp(separator.source, (reFlags.exec(separator) || '') + 'g');
      }
      separator.lastIndex = 0;
      while ((match = separator.exec(substring))) {
        newEnd = match.index;
      }
      result = result.slice(0, newEnd == null ? end : newEnd);
    }
  } else if (string.indexOf(separator, end) != end) {
    var index = result.lastIndexOf(separator);
    if (index > -1) {
      result = result.slice(0, index);
    }
  }
  return result + omission;
}

module.exports = trunc;

Name	Size	Permission
camelCase.js	680 bytes	0644
capitalize.js	494 bytes	0644
deburr.js	1090 bytes	0644
endsWith.js	1075 bytes	0644
escape.js	1884 bytes	0644
escapeRegExp.js	1141 bytes	0644
kebabCase.js	649 bytes	0644
pad.js	1307 bytes	0644
padLeft.js	654 bytes	0644
padRight.js	664 bytes	0644
parseInt.js	1531 bytes	0644
repeat.js	1099 bytes	0644
snakeCase.js	626 bytes	0644
startCase.js	690 bytes	0644
startsWith.js	974 bytes	0644
template.js	9102 bytes	0644
templateSettings.js	1389 bytes	0644
trim.js	1349 bytes	0644
trimLeft.js	1076 bytes	0644
trimRight.js	1101 bytes	0644
trunc.js	3257 bytes	0644
unescape.js	1084 bytes	0644
words.js	1188 bytes	0644

File Content: trunc.js

File Content: `trunc.js`