select

get items in collection that satisfy given condition

Parameters

select collection :integer :string :literal :dictionary :object :inline :block :range
       params :null :literal :block
       condition :block :bytecode

Attributes

with :literal use given index
first :integer only return first element/s
last :integer only return last element/s
n :integer only return n-th element

Returns

  • :block
  • or  :nothing
  • :any

Examples

copy
print select 1..10 [x][
    even? x
]
; 2 4 6 8 10

copy
arr: 1..10
select 'arr 'x -> even? x
print arr
; 2 4 6 8 10

copy
select [1 1 2 3 5 8 13 21] [x y]-> odd? x+y
; => [2 3 5 8]

copy
select.with:'i ["zero" "one" "two" "three" "four" "five"] []-> even? i
; => ["zero" "two" "four"]

copy
select.first 1..10 => odd?
=> [1]

select.first:3 1..10 => odd?
=> [1 3 5]

copy
select.last 1..10 => odd?
=> [9]

select.last:3 1..10 => odd?
=> [5 7 9]

Related