CODEWITHSUNDEEP
javascripttokenize
dokondr
dokondr

Reputation: 3539

Split a string using whitespace in Javascript?

I need a tokenizer that given a string with arbitrary white-space among words will create an array of words without empty sub-strings.

For example, given a string:

" I dont know what you mean by glory Alice said."

I use:

str2.split(" ")

This also returns empty sub-strings:

["", "I", "dont", "know", "what", "you", "mean", "by", "glory", "", "Alice", "said."]

How to filter out empty strings from an array?

Upvotes: 13

Views: 29830

Answers (7)

Ольга Винникова
Ольга Винникова

Reputation: 1

That is all that we need:

str.trim().split(' ')

Upvotes: 0

Omar Al-qasmi
Omar Al-qasmi

Reputation: 3

i think empty sub-string happen because there are multiple white-spaces you can use a replace() in a for loop to replace multiple white-spaces with a single white-space then split() to split the program using a single white space like this:

// getting full program from div
var program = document.getElementById("ans").textContent;
//removing multiple spaces
var res = program.replace("  ", " ");
for (i = 0; i <= program.length; i++) {
  var res = res.replace("  ", " ");
}
// spliting each word using space as saperator
var result = res.split(" ");

Upvotes: 0

pimvdb
pimvdb

Reputation: 154828

I recommend .match:

str.match(/\b\w+\b/g);

This matches words between word boundaries, so all spaces are not matched and thus not included in the resulting array.

Upvotes: 2

georg
georg

Reputation: 214949

 str.match(/\S+/g)

returns a list of non-space sequences ["I", "dont", "know", "what", "you", "mean", "by", "glory", "Alice", "said."] (note that this includes the dot in "said.")

 str.match(/\w+/g)

returns a list of all words: ["I", "dont", "know", "what", "you", "mean", "by", "glory", "Alice", "said"]

docs on match()

Upvotes: 11

Galway
Galway

Reputation: 258

You should trim the string before using split.

var str = " I dont know what you mean by glory Alice said."
var trimmed = str.replace(/^\s+|\s+$/g, '');
trimmed = str.split(" ")

Upvotes: 7

ewok
ewok

Reputation: 21443

see the filter method

http://www.hunlock.com/blogs/Mastering_Javascript_Arrays#quickIDX13

Upvotes: 0

Daff
Daff

Reputation: 44215

You probably don't even need to filter, just split using this Regular Expression:

"   I dont know what you mean by glory Alice said.".split(/\b\s+/)

Upvotes: 18

Related Questions