pop()
always removes the last element of an array. What if you want to remove the first?
That's where .shift()
comes in. It works just like .pop()
, except it removes the first element instead of the last.
.shift()
function to remove the first item from myArray
, assigning the "shifted off" value to removedFromMyArray
.
myArray
should now equal [["dog", 3]]
.'
testString: 'assert((function(d){if(d[0][0] == "dog" && d[0][1] === 3 && d[1] == undefined){return true;}else{return false;}})(myArray), "myArray
should now equal [["dog", 3]]
.");'
- text: 'removedFromMyArray
should contain ["John", 23]
.'
testString: 'assert((function(d){if(d[0] == "John" && d[1] === 23 && typeof removedFromMyArray === "object"){return true;}else{return false;}})(removedFromMyArray), "removedFromMyArray
should contain ["John", 23]
.");'
```