String to array只选择长度为6的元素

Question

Lets suppose i have this string:

 01234  ; 0123;0424 09234

How can i split these string by two arguments ' ' and ';' ,

Trim the single elements

and next, select only these elements of the array who have a length of 5

So that at the end it returns this array:

["01234","09234"]

My biggest problem with this task is that i dont know how i should split the string because always when i do:

 a = "0123 9809; 04323 ";
 b = a.split(' ').split(';')

I get this error:

TypeError: Object [object Array] has no method 'split'

Thanks for your help!

Answer 1

Use:

' 01234  ; 0123;0424 09234'.split(/\s|;/).filter(function (e) {
  return e.trim().length === 5;
});

in the example above split accepts a regular expression used for splitting the string. After that we use the high-order function filter , which filters the input.

The is valid for all modern browsers .

Answer 2

.split() works on strings so that is why you are seeing the error - you are calling it on a string which returns an array, and they trying to call it again on the array. There are many ways to approach this.

I'd be tempted to take a short cut and replace all spaces with semicolons and then perform a single .split(';') to generate the array, and then use .filter() to filter out only those strings in the array that match the length you are looking for.