check if given number or collection size is one

Parameters

one? number :null :integer :floating :string :dictionary :block :range

Returns

Examples

copy
one? 5              ; => false
one? 4-3            ; => true

copy
one? 1.0            ; => true
one? 0.0            ; => false

copy
items: ["apple"]
one? items          ; => true

items: [1 2 3]
one? items          ; => false

copy
one? ø              ; => false

Related