CODEWITHSUNDEEP
javascriptregex
abdfahim
abdfahim

Reputation: 2553

regex for multiple option

I need to write a regex expression to use with JS .match() function. The objective is to check a string with multiple alternatives. For example, I want to return true in below code if mystr contains word1 or word2 or word3

mystr1 = "this_is_my_test string_containing_word2_where_i_will_perform_search";
mystr2 = "this_is_my_test string_where_i_will_perform_search";
myregex = xxxxxx; // I want help regarding this line so that 
if(mystr1.match(myregex)) return true; //should return true
if(mystr2.match(myregex)) return true; //should NOT return true

Any help please?

Upvotes: 7

Views: 26540

Answers (3)

Bruno
Bruno

Reputation: 5822

If you are not making use of your matches then I might be inclined to using the test() method and including the i flag as well.

if( /word1|word2|word3/i.test( mystr1 ) ) return true; //should return true
if( /word1|word2|word3/i.test( mystr2 ) ) return true; //should NOT return true

Upvotes: 0

Diego
Diego

Reputation: 16714

The regex is: /word1|word2|word3/

Be aware that, as well as your code would work, you are actually not using the method you need.

  • string.match(regex) -> returns an array of matches. When evaluated as boolean, it would return false when empty (that's why it works).
  • regex.test(string) -> is what you should use. It evaluates if the string matches the regex and return a true or false.

Upvotes: 2

Konstantin Dinev
Konstantin Dinev

Reputation: 34895

So use the OR | in your RegEx:

myregex = /word1|word2|word3/;

Upvotes: 14

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