Part of string search and replace in Node JS

Question

I wanted to do some regex search on strings and remove that part of the string that matches.

Eg. I have following strings

xyz-v1.0.0#
abc-v2.0.0#
def-v1.1.0#

So, for such cases, I wanted to remove -v1.0.0#, -v2.0.0# and -v1.1.0# from these strings.

So, for this what regex can I use and how can I remove them in Node JS?

Can you put the code you tried so far?

Pablo Cesar Cordova Morales
– Pablo Cesar Cordova Morales

2017-11-01 22:15:26 +00:00
Commented Nov 1, 2017 at 22:15 — Pablo Cesar Cordova Morales
– Pablo Cesar Cordova Morales, Commented Nov 1, 2017 at 22:15

kakamg0 · Accepted Answer · 2017-11-01 22:19:28Z

1

You can do this

.replace(/-.*$/, '') will check for -{anything} at the end of the string and replace with nothing.

const strs = [
  'xyz-v1.0.0#',
  'abc-v2.0.0#',
  'def-v1.1.0#'
];
const newStrs = strs.map(str => str.replace(/-.*$/, ''));
console.log(newStrs);

answered Nov 1, 2017 at 22:19

kakamg0

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7 Comments

kakamg0 Over a year ago

You could also use the regular expression /-v.*$/ to make sure that it is replacing the version at the end of the string.

Chacha Over a year ago

there is actually one issue here. say, if string is abc-vxy-v1.0.0#, then it is removing -vxy-v1.0.0#, I only want to remove from last dash(-)

kakamg0 Over a year ago

Okay, you can use this regular expression /-v\d+\.\d+\.\d+#$/ to match this specific format -v{number}.{number}.{number}#. I have to go out now, but i'll think of something better later.

Chacha Over a year ago

Yeah this is one way. This is also not always correct, I am thinking if somehow I could detect last dash(-) somehow, that would be best. like instead of .*, restriction on dot(.) to not include dash(-)

kakamg0 Over a year ago

Try adding $ at end of the regular expression, it should only match the end of the string

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