Test for an array being subset of another master array
1
I was trying to build a small utility function to check if an array is part of other array. It's testing if an array is a 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
edited 9 mins ago
Jamal♦
30.2k11116226
asked Jul 16 at 6:50
Harshal
1064
add a comment |
1
I was trying to build a small utility function to check if an array is part of other array. It's testing if an array is a 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
edited 9 mins ago
Jamal♦
30.2k11116226
asked Jul 16 at 6:50
Harshal
1064
2
Wouldn't that fail ifmasterArrayhas 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
add a comment |
1
1
1
I was trying to build a small utility function to check if an array is part of other array. It's testing if an array is a 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
edited 9 mins ago
Jamal♦
30.2k11116226
asked Jul 16 at 6:50
Harshal
1064
I was trying to build a small utility function to check if an array is part of other array. It's testing if an array is a 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
typescript
edited 9 mins ago
Jamal♦
30.2k11116226
asked Jul 16 at 6:50
Harshal
1064
edited 9 mins ago
Jamal♦
30.2k11116226
asked Jul 16 at 6:50
Harshal
1064
edited 9 mins ago
Jamal♦
30.2k11116226
edited 9 mins ago
Jamal♦
30.2k11116226
edited 9 mins ago
Jamal♦
30.2k11116226
30.2k11116226
asked Jul 16 at 6:50
Harshal
1064
asked Jul 16 at 6:50
Harshal
1064
asked Jul 16 at 6:50
Harshal
1064
1064
2
Wouldn't that fail ifmasterArrayhas 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
add a comment |
2
Wouldn't that fail ifmasterArrayhas 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
add a comment |
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2
Wouldn't that fail if
masterArrayhas 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