js正则表达式提取字母之间的空格。 积极的看法？

Question

I want to match the \\s character within any letter, not numbers :

'abc def ghi'

should match the empty spaces between c and d & f and g .

I think I should use positive lookbehind, but as I know, it`s not posibile in js. Any solution?

Answer 1

This one should work

(?=[^0-9]+)(\s+)(?=[^0-9]+)

or another tricky way, you just replace your conditional white space by some special text first, eg I use _SPACE_

/([^0-9])(\s+)(?=[^0-9])/$1_SPACE_/

Original text:

abc defg xhi abc 111 999 111 abc def

After replacing:

abc_SPACE_defg_SPACE_xhi_SPACE_abc 111 999 111 abc_SPACE_def

Then you just search for _SPACE_ instead of your conditional white space.

Answer 2

Use this code:

 var s = "abc def ghi 3rt"; s = s.replace(/(^|.)(\\s+)(?!\\d)/g, function (m, grp1, grp2, offset, input) { return (grp1.length !== 0 && !((grp1.charCodeAt(0) > 47) && (grp1.charCodeAt(0) < 58))) ? grp1 + "<span>" + grp2 + "</span>" : grp1 + grp2; }); alert(s); 

With (^|.)(\\s+)(?!\\d) , we match any spaces ( \\s+ ) that are either at the start of string or after some character that we check for a digit equivalence with (grp1.charCodeAt(0) > 47) && (grp1.charCodeAt(0) < 58) . And (?!\\d) makes sure we only match those spaces that are not followed with a digit.

UPDATE

If you literally mean to match whitespace between English letters , use

 var s = "abc def ghi 3rt"; s = s.replace(/(^|[az])(\\s+)(?=[az])/ig, "$1<span>$2</span>"); document.write(s.replace(/</g,"&lt;").replace(/>/g,"&gt;")); 

Answer 3

You can use matched group and a lookahead:

var s = 'abc def ghi';
var r = s.replace(/([a-z])(\s+)(?=[a-z])/gi, "$1<span>$2</span>");
//=> "abc<span> </span>def<span> </span>ghi"

Answer 4

You can use the split function

str = str.replace(" ", "<span> </span>");

and then you can use each function to place in tag :)

Answer 5

text = text.replace(/\s+|(?: )+/g,function(x,i){
    if( text.charAt(i-1).match(/[a-zA-Z]/) == null && text.charAt(x.length+i).match(/[a-zA-Z]/) == null ){
        return '<span>'+x+'</span>';
    } else return x;
});

I`ve changed the rule, that white space should NOT match a-zA-Z