javascript - Check if a sentence or part of a sentence is a inside an other sentence -

i'm trying how sentence inside sentence.

for example

i have 2 sentences:

• "this first"
• "i first "

in example, result want "the first" inside both of sentences.

i want start loop on whole second sentence. mean, first search if "i first " inside "this first". if not, check if "i " inside, if not check "am first". split 2 words , on...until i'm getting match (or not)

what efficient way in js?

you can split both strings array.

var array1 = 'this first'.split(' '); var array2 = 'i first'.split(' '); 

now can loop on 1 array , find out if word in array. , if match found put in array , join matched results separated space