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In SQL Server, I could say:
WHERE X IN(1,2) How would you rewrite the following in JavaScript:
if (X==1 || X==2) {} 
489
To check if an array contains duplicates: Use the Array. some() method to iterate over the array. Check if the index of the first occurrence of the current value is NOT equal to the index of its last occurrence. If the condition is met, then the array contains duplicates.
function checkIfArrayIsUnique(myArray) { for (var i = 0; i < myArray. length; i++) { for (var j = 0; j < myArray. length; j++) { if (i != j) { if (myArray[i] == myArray[j]) { return true; // means there are duplicate values } } } } return false; // means there are no duplicate values. }
Use indexOf to see if x is in an array.
if([1,2].indexOf(x) !== -1) Using Array .includes method.
if ([1, 2].includes(x)) { // array has x } 
answered Oct 05 '22 23:10
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