Test for an array being subset of another master array

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This is my first question in this forum. I was trying to build a small utility function to check if array is part of other array.
Testing if an array is subset of another master array.



const masterArray = [1,2,3,4,5,6];
const candidateArray = [2,5,6];

//Test for subset.

//create a set from the two.
const s1 = new Set(masterArray.concat(candidateArray));

//Compare the sizes of the master array and the created set
//If the sizes are same, no new elements are added that means
//the candidate is complete subset.
s1.size === masterArray.length;


Can this be handled in a better way?




typescript




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  • 2




    Wouldn't that fail if masterArray has duplicate elements?
    – Martin R
    Jul 16 at 7:15










  • Good point. In my case the master array is always unique.
    – Harshal
    Jul 16 at 7:22










  • I can enhance it by comparing with a new set created from master array (new Set(masterArray)).size
    – Harshal
    Jul 16 at 8:46
















up vote
1
down vote

favorite












This is my first question in this forum. I was trying to build a small utility function to check if array is part of other array.
Testing if an array is subset of another master array.



const masterArray = [1,2,3,4,5,6];
const candidateArray = [2,5,6];

//Test for subset.

//create a set from the two.
const s1 = new Set(masterArray.concat(candidateArray));

//Compare the sizes of the master array and the created set
//If the sizes are same, no new elements are added that means
//the candidate is complete subset.
s1.size === masterArray.length;


Can this be handled in a better way?




typescript




share|improve this question















  • 2




    Wouldn't that fail if masterArray has duplicate elements?
    – Martin R
    Jul 16 at 7:15










  • Good point. In my case the master array is always unique.
    – Harshal
    Jul 16 at 7:22










  • I can enhance it by comparing with a new set created from master array (new Set(masterArray)).size
    – Harshal
    Jul 16 at 8:46












up vote
1
down vote

favorite









up vote
1
down vote

favorite











This is my first question in this forum. I was trying to build a small utility function to check if array is part of other array.
Testing if an array is subset of another master array.



const masterArray = [1,2,3,4,5,6];
const candidateArray = [2,5,6];

//Test for subset.

//create a set from the two.
const s1 = new Set(masterArray.concat(candidateArray));

//Compare the sizes of the master array and the created set
//If the sizes are same, no new elements are added that means
//the candidate is complete subset.
s1.size === masterArray.length;


Can this be handled in a better way?




typescript




share|improve this question











This is my first question in this forum. I was trying to build a small utility function to check if array is part of other array.
Testing if an array is subset of another master array.



const masterArray = [1,2,3,4,5,6];
const candidateArray = [2,5,6];

//Test for subset.

//create a set from the two.
const s1 = new Set(masterArray.concat(candidateArray));

//Compare the sizes of the master array and the created set
//If the sizes are same, no new elements are added that means
//the candidate is complete subset.
s1.size === masterArray.length;


Can this be handled in a better way?





typescript





share|improve this question










share|improve this question




share|improve this question









asked Jul 16 at 6:50









Harshal

1064




1064







  • 2




    Wouldn't that fail if masterArray has duplicate elements?
    – Martin R
    Jul 16 at 7:15










  • Good point. In my case the master array is always unique.
    – Harshal
    Jul 16 at 7:22










  • I can enhance it by comparing with a new set created from master array (new Set(masterArray)).size
    – Harshal
    Jul 16 at 8:46












  • 2




    Wouldn't that fail if masterArray has duplicate elements?
    – Martin R
    Jul 16 at 7:15










  • Good point. In my case the master array is always unique.
    – Harshal
    Jul 16 at 7:22










  • I can enhance it by comparing with a new set created from master array (new Set(masterArray)).size
    – Harshal
    Jul 16 at 8:46







2




2




Wouldn't that fail if masterArray has duplicate elements?
– Martin R
Jul 16 at 7:15




Wouldn't that fail if masterArray has duplicate elements?
– Martin R
Jul 16 at 7:15












Good point. In my case the master array is always unique.
– Harshal
Jul 16 at 7:22




Good point. In my case the master array is always unique.
– Harshal
Jul 16 at 7:22












I can enhance it by comparing with a new set created from master array (new Set(masterArray)).size
– Harshal
Jul 16 at 8:46




I can enhance it by comparing with a new set created from master array (new Set(masterArray)).size
– Harshal
Jul 16 at 8:46















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