Today’s Ruby Tuesday is on Array#push.
Array#push takes a item and appends that item to an existing Array.
1 2 3 4 5 6 7 8 | [].push 1# => [1][3, 7, 5].push 1# => [3, 7, 5, 1][3, 7, 5].push []# => [3, 7, 5, []][3, 7, 5].push nil# => [3, 7, 5, nil] |
Array#push also returns itself as the return value, allowing you to chain together calls.
1 2 3 4 5 6 7 8 | [3, 7, 5].push(2).push(8).push(6)# => [3, 7, 5, 2, 8, 6]q = [3, 7, 5]# => [3, 7, 5]q.push(2).push(8).push(6)# => [3, 7, 5, 2, 8, 6]q# => [3, 7, 5, 2, 8, 6] |
You can also pass more than one argument to Array#push, and it will push each of those items to the Array in turn.
1 2 3 4 | [3, 7, 5].push(2, 8, 6)# => [3, 7, 5, 2, 8, 6][3, 7, 5].push(*[2, 8, 6])# => [3, 7, 5, 2, 8, 6] |
–Proctor
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