Sha256: 0ed82b19cd659e22642900bdd7b20d6f8f7262361507ab639b77a67f8afb58bf
Contents?: true
Size: 1.19 KB
Versions: 7
Compression:
Stored size: 1.19 KB
Contents
ok(if my_special_variable? then false else true)
my_special_variable: false
ok(if my_special_variable? then true else false)
# Existential assignment.
a: 5
a: null
a ?= 10
b ?= 10
ok a is 10 and b is 10
# The existential operator.
z: null
x: z ? "EX"
ok z is null and x is "EX"
# Only evaluate once.
counter: 0
get_next_node: ->
throw "up" if counter
counter++
ok(if get_next_node()? then true else false)
# Existence chains, soaking up undefined properties:
obj: {
prop: "hello"
}
ok obj?.prop is "hello"
ok obj?['prop'] is "hello"
ok obj.prop?.length is 5
ok obj?['prop']?['length'] is 5
ok obj?.prop?.non?.existent?.property is undefined
ok obj?['non']?['existent'].property is undefined
# Soaks and caches method calls as well.
arr: ["--", "----"]
ok arr.pop()?.length is 4
ok arr.pop()?.length is 2
ok arr.pop()?.length is undefined
ok arr[0]?.length is undefined
ok arr.pop()?.length?.non?.existent()?.property is undefined
# Soaks method calls safely.
value: undefined
result: value?.toString().toLowerCase()
ok result is undefined
value: 10
result: value?.toString().toLowerCase()
ok result is '10'
# Safely existence test on soaks.
result: not value?.property?
ok result
Version data entries
7 entries across 7 versions & 1 rubygems