Issue #21300 has been updated by Eregon (Benoit Daloze). Using `ary.size =` feels unidiomatic Ruby to me, it feels very low level and not very expressive about the intent (e.g. it's not clear if shrinking or growing). I don't think pop(n) returning an Array is big overhead, i.e., I don't think there is enough reason to add another Array method for this rarely-needed case. ---------------------------------------- Feature #21300: Suggestion: Method for Array truncation https://bugs.ruby-lang.org/issues/21300#change-112864 * Author: sigsys (Math Ieu) * Status: Open ---------------------------------------- `#pop(n)` and `#slice!(...)` can be used for truncation, but they both allocate a new array for the deleted elements (unless you do it one at a time with `#pop()`...), which is not always needed. I propose adding a `#size=` method for truncating without allocating a new array: ``` a = [10, 20, 30] a.size = 2 a # [10, 20] ``` Growing the array could be allowed as well... ``` a = [10, 20] a.size = 4 a # [10, 20, nil, nil] ``` -- https://bugs.ruby-lang.org/