In Ruby, to add a value to the front and return a new array (as opposed to modifying it in-place), you can do the following:
existing_arr = ["bar", "baz"] new_arr = ["foo", *existing_arr] print new_arr # ["foo", "bar", "baz"]
In the example above, the value you wish to add to the front goes at the first index in the new array and the existing array is unpacked (using
*) right after. This does not mutate/modify the original array. Another way to achieve the same is by using the
+ operator, for example, like so:
existing_arr = ["bar", "baz"] new_arr = ["foo"] + existing_arr print new_arr # ["foo", "bar", "baz"]
This would return a new array with the value
'foo' at the front, followed by all elements of "
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