truncate

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_.truncate([string=''], [options])

截断字符串，如果字符串超出了限定的最大值。 被截断的字符串后面会以 omission 代替，omission 默认是 "..."。

参数

1. [string=''] (string)

   要截断的字符串

2. [options] (Object)

   选项对象

3. [options.length=30] (number)

   允许的最大长度

4. [options.omission='...'] (string)

   超出后的代替字符

5. [options.separator] (RegExp|string)

   截断点

返回值 (string)

返回截断后的字符串

示例

_.truncate('hi-diddly-ho there, neighborino');
// => 'hi-diddly-ho there, neighbo...'

_.truncate('hi-diddly-ho there, neighborino', {
  'length': 24,
  'separator': ' '
});
// => 'hi-diddly-ho there,...'

_.truncate('hi-diddly-ho there, neighborino', {
  'length': 24,
  'separator': /,? +/
});
// => 'hi-diddly-ho there...'

_.truncate('hi-diddly-ho there, neighborino', {
  'omission': ' [...]'
});
// => 'hi-diddly-ho there, neig [...]'