var str = 'abc 123 hello xyz';
How to concat above string to abc123helloxyz? I tried to trim but it left spaces still between characters. I can't use split(' ') too as the space is not one some time.
4 Answers
You might use a regex successfully. \s checks for the occurences for any white spaced charachters. + accounts for more than once occurences of spaces. and `/g' to check for continue searching even after the first occurences is found.
var str = 'abc 123 hello xyz';
str = str.replace(/\s+/g, "");
console.log(str);
3 Comments
Eunice Chia
\s for whitespace?
Ayan
Yes, \s match any white space character [\r\n\t\f ]. Now it means only one character. so we add \s+ to denote there can be many adjacent spaces, find them all.
Ayan
Try this regex tool. regex101.com paste the regex there, play with it and see how it varies along with the explanation.
Use a regex.
var newstr = str.replace(/ +/g, '')
This will replace any number of spaces with an empty string. You can also expand it to include other whitespace characters like so
var newstr = str.replace(/[ \n\t\r]+/g, '')
Comments
Replace the spaces in the string:
str = str.replace(" ", "");
Edit: as has been brought to my attention, this only replaces the first occurrence of the space character. Using regex as per the other answers is indeed the correct way to do it.
1 Comment
nnnnnn
This only replaces the first space.
The cleanest way is to use the following regex:
\s means "one space", and \s+ means "one or more spaces".
/g flag means (replace all occurrences) and replace with the empty string.
var str = 'abc 123 hello xyz';
console.log("Before: " + str);
str = str.replace(/\s+/g, "");
console.log("After: " + str);
str.replace(/\s+/g, "");concatis not the correct term. concat is short for concatenate - to link together, unite in series or chain, and in programming, usually refers to adding stuff to the "end" of existing stuff