CODEWITHSUNDEEP
javascriptregex
Ruan
Ruan

Reputation: 83

Regular expression to check formula

Been trying now for a bit but can't figure this one out, I need a regular expression in Javascript that will match any term that only contains any of the following characters:

The digits 0-9, the minus sign (-), divide (/), multiply (*), plus (+), space ( ), left and right brackets ( ( and ) ), dot (.) and then lastly a comma (,).

If it contains anything else I want it to return false. It can contain multiples of each or only some of the characters in this set. What I have so far:

var regExResult = someString.test(/([^A-Z][^a-z][0-9]|[-]|[\+]|[*]|[,]|[.]|[)]|[(]|[\/]|[ ])+/g);

But for some reason it returns true even if the string contains only one character of these mentioned?

Any help would be greatly appreciated Thanks

Upvotes: 0

Views: 1483

Answers (2)

erosman
erosman

Reputation: 7721

Here is an example code 

var str = '1234-/*()., '; // results in 'good' alert
var str = '12a34-/*()., '; // results in 'bad' alert

if (/[^0-9-/*()., ]/.test(str)) { // true if it finds anything that is not allowed
  alert('bad');
}
else { // if it didn't finds anything that is not allowed 
  alert('good');
}

Good luck :)

Upvotes: 0

sshashank124
sshashank124

Reputation: 32189

You can do that check as:

^[0-9*+ ().,-]+$

Demo: http://regex101.com/r/yK2cG5

Upvotes: 1

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