javascript - split without losing the separator [duplicate]

Answer 1

Use positive lookahead so that the regular expression asserts that the special character exists, but does not actually match it:

string.split(/<br \/>(?=&#?[a-zA-Z0-9]+;)/g);

Answer 2

You could just iterate over a simple regular expression and build the array that way:

var x = new RegExp('<foo>(.*?)</bar>', 'ig'),
s = "<foo>abcdefg</bar><foo>abcdefg</bar><foo>abcdefg</bar><foo>abcdefg</bar>",
matches = [];

while (i = x.exec(s)) {
    matches.push(i[0]);
}

Just realized using String.match() would be better; this code would be more useful for matching the contents inside the tags.

Answer 3

It seems that you would most likely want to use match:

var s = "<foo>abcd1efg</bar><foo>abc2defg</bar><foo>abc3defg</bar><foo>abc4defg</bar>"
s.match(/(<foo>.+?<\/bar>)/g)
// =>["<foo>abcd1efg</bar>", "<foo>abc2defg</bar>", "<foo>abc3defg</bar>", "<foo>abc4defg</bar>"]

Answer 4

Try this. It's not a perfect solution, but it should work in most cases.

str.split(/(?=<foo>)/)

That is, split it in the position before each opening tag.

EDIT: You could also do it with match(), like so:

str.match(/<foo>.*?<\/bar>/g)