Object

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examples

object new

input

Object.new

result

nothing

array not equal dictionary

input

[] != {}

result

true

not strictly equal

input

1 !== true

result

true

list new equal empty array

input

List.new == []

result

true

dictionary new strictly equal empty dictionary

input

Dictionary.new === {}

result

true

class functions

!

examples

not true

input

!true

result

false

not false

input

!false

result

true

not nothing

input

!nothing

result

true

not not nothing

input

!!nothing

result

false

not array

input

![]

result

false

not object

input

!{}

result

false

not zero

input

!0

result

false
!=

examples

not equal to

input

1 != 2

result

true

empty lists comparison

input

[] != []

result

false
&&

examples

logical and puts symbol example

input

true && puts(:hello)

output

hello

result

nothing

false and puts

input

false && puts(:bye)

result

false
+

examples

unary plus operator with boolean result

input

+true

result

true

+ with zero

input

+0

result

0

unary plus with integer

input

+2

result

2

unary plus with float

input

+2.1

result

2.1

unary plus with empty array

input

+[]

result

[]
..

examples

range to list

input

(1..10).to_list

result

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
...

examples

range exclusive to list

input

(1...10).to_list

result

[1, 2, 3, 4, 5, 6, 7, 8, 9]
==

examples

equals comparison

input

1 == 2

result

false

equals check success

input

3 == 3

result

true
===

examples

strict equality

input

1 === 1

result

true

strict equality

input

1 === 2

result

false
and

examples

trueshowshello

input

true and puts(:hello)

output

hello

result

nothing

false shows nothing

input

false and puts(:bye)

result

false
as_json

examples

one as json returns one

input

1.as_json

result

1

one point two as json

input

1.2.as_json

result

"1.2"

array of numbers as json

input

[1, 2, 3].as_json

result

[1, 2, 3]

array with hash as json

input

[1, {a: :b}, 3].as_json

result

[1, {"a" => "b"}, 3]
deep_duplicate

examples

deep duplicate

input

object = { given_name: "dorian", programs: [ { name: "pomodoro", }, ], } copy = object.deep_duplicate copy.programs[0].name = "pomodoro 2" p(object) p(copy)

output

{"given_name" => "dorian", "programs" => [{"name" => "pomodoro"}]} {"given_name" => "dorian", "programs" => [{"name" => "pomodoro"}], [["programs", 0], "name"] => "pomodoro 2"}

result

nothing
different

examples

different two true

input

1.different(2)

result

true

different one false

input

1.different(1)

result

false
duplicate

examples

no method error undefined method duplicate for hash

input

object = { given_name: "dorian" } copy = object.duplicate copy.given_name = "grandma" p(object) p(copy)

output

{"given_name" => "dorian"} {"given_name" => "grandma"}

result

nothing
equal

examples

one dot equal

input

1.equal(1)

result

true

one dot equal

input

1.equal(2)

result

false
exclusive_range

examples

exclusive range

input

1.exclusive_range(10).to_list

result

[1, 2, 3, 4, 5, 6, 7, 8, 9]
falsy?

examples

nothing falsy

input

nothing.falsy?

result

true

false falsy

input

false.falsy?

result

true

true is falsy

input

true.falsy?

result

false

zero falsy

input

0.falsy?

result

false

one falsy

input

1.falsy?

result

false

empty array falsy

input

[].falsy?

result

false

empty object falsy

input

{}.falsy?

result

false

array falsy check

input

[1, 2, 3].falsy?

result

false

object falsy check

input

{ a: 1, b: 2 }.falsy?

result

false
inclusive_range

examples

inclusive range list

input

1.inclusive_range(10).to_list

result

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
name

examples

integer name result

input

Integer.name

result

"Integer"

boolean name result

input

Boolean.new.name

result

"Boolean"

boolean name

input

true.name

result

"Boolean"

dictionary name

input

{}.name

result

"Dictionary"
new

examples

true new false

input

true.new

result

false

false new true

input

false.new(true)

result

true

one new two

input

1.new(2)

result

2

integer new two

input

Integer.new(2)

result

2

boolean new true

input

Boolean.new(true)

result

true
not

examples

evaluate not operation

input

not nothing

result

true

evaluate not true

input

not true

result

false

not false true

input

not false

result

true
or

examples

true or false true

input

true or false

result

true

false or false false

input

false or false

result

false

true or true true

input

true or true

result

true

false or true true

input

false or true

result

true
self

examples

integer self returns the same integer

input

1.self

result

1

boolean self returns the same boolean

input

true.self

result

true

array map self returns same array

input

[1, 2, 3].map(&:self)

result

[1, 2, 3]
strict_equal

examples

input one strict equal one result true

input

1.strict_equal(1)

result

true

input two strict equal one result false

input

2.strict_equal(1)

result

false
to_boolean

examples

nothing to boolean

input

nothing.to_boolean

result

false

one to boolean

input

1.to_boolean

result

true

true to boolean

input

true.to_boolean

result

true
to_class

examples

integer output for to class

input

1.to_class

result

Code::Object::Integer

true to class

input

true.to_class

result

Code::Object::Boolean

nothing to class

input

nothing.to_class

result

Code::Object::Nothing
to_date

examples

to date

input

"2025-06-15".to_date

result

2025-06-15
to_decimal

examples

conversion of number to decimal

input

1.to_decimal

result

1.0
to_dictionary

examples

to dictionary

input

[[:a, 1], [:b, 2]].to_dictionary

result

{}
to_duration

examples

to duration error

input

1.to_duration

result

0
to_integer

examples

float to integer

input

1.2.to_integer

result

1
to_json

examples

to_json array conversion

input

[1, 2, { a: 3 }].to_json

result

"[1,2,{\"a\":3}]"
to_list

examples

one to list

input

1.to_list

result

[]

true to list

input

true.to_list

result

[]

empty dictionary to list

input

{}.to_list

result

[]

dictionary to list

input

{ a: 1, b: 2 }.to_list

result

[["a", 1], ["b", 2]]
to_nothing

examples

number to_nothing to nothing

input

1.to_nothing

result

nothing

dictionary to_nothing to nothing

input

{}.to_nothing

result

nothing
to_parameter

examples

hash to parameter

input

{ a: 1 }.to_parameter

result

"a-1"
to_range

examples

to range

input

[1, 2].to_range

result

1..2
to_string

examples

one to string

input

1.to_string

result

"1"

empty input to string

input

nothing.to_string

result

""

array to string

input

[1, 2, 3].to_string

result

"[1, 2, 3]"
to_time

examples

to time conversion

input

"2025-06-15 16:41".to_time

result

2025-06-15 16:41:00 UTC
truthy?

examples

nothing truthy

input

nothing.truthy?

result

false

false truthy

input

false.truthy?

result

false

true truthy

input

true.truthy?

result

true

zero truthy

input

0.truthy?

result

true

one truthy

input

1.truthy?

result

true

empty array truthy

input

[].truthy?

result

true

empty object truthy

input

{}.truthy?

result

true

array truthy

input

[1, 2, 3].truthy?

result

true

object truthy

input

{ a: 1, b: 2 }.truthy?

result

true
||

examples

logical or with puts

input

false || puts(:hello)

output

hello

result

nothing

logical or true evaluation

input

true || puts(:bye)

result

true

instance functions

!

examples

negate true

input

!true

result

false

negate false

input

!false

result

true

negate nothing

input

!nothing

result

true

double negate nothing

input

!!nothing

result

false

negate empty array

input

![]

result

false

negate empty object

input

!{}

result

false

negate zero

input

!0

result

false
!=

examples

not equal operator

input

1 != 2

result

true

empty arrays not equal

input

[] != []

result

false
&&

examples

logical and operator with puts function

input

true && puts(:hello)

output

hello

result

nothing

false and puts function

input

false && puts(:bye)

result

false
+

examples

unary plus true

input

+true

result

true

unary plus zero

input

+0

result

0

unary plus two

input

+2

result

2

unary plus two point one

input

+2.1

result

2.1

unary plus array

input

+[]

result

[]
..

examples

range to list conversion

input

(1..10).to_list

result

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
...

examples

range to list

input

(1...10).to_list

result

[1, 2, 3, 4, 5, 6, 7, 8, 9]
==

examples

equality comparison false

input

1 == 2

result

false

equality comparison true

input

3 == 3

result

true
===

examples

strict equality check

input

1 === 1

result

true

strict equality check

input

1 === 2

result

false
and

examples

true_and_puts_hello

input

true and puts(:hello)

output

hello

result

nothing

false_and_puts_bye

input

false and puts(:bye)

result

false
as_json

examples

integer to json

input

1.as_json

result

1

float to json

input

1.2.as_json

result

"1.2"

list to json

input

[1, 2, 3].as_json

result

[1, 2, 3]

array hash symbol

input

[1, {a: :b}, 3].as_json

result

[1, {"a" => "b"}, 3]
deep_duplicate

examples

deep duplicate object modification

input

object = { given_name: "dorian", programs: [ { name: "pomodoro", }, ], } copy = object.deep_duplicate copy.programs[0].name = "pomodoro 2" p(object) p(copy)

output

{"given_name" => "dorian", "programs" => [{"name" => "pomodoro"}]} {"given_name" => "dorian", "programs" => [{"name" => "pomodoro"}], [["programs", 0], "name"] => "pomodoro 2"}

result

nothing
different

examples

one different two

input

1.different(2)

result

true

one different one

input

1.different(1)

result

false
duplicate

examples

object duplicate error

input

object = { given_name: "dorian", } copy = object.duplicate copy.given_name = "grandma" p(object) p(copy)

output

{"given_name" => "dorian"} {"given_name" => "grandma"}

result

nothing
equal

examples

equal evaluation

input

1.equal(1)

result

true

equal false

input

1.equal(2)

result

false
exclusive_range

examples

exclusive range to list

input

1.exclusive_range(10).to_list

result

[1, 2, 3, 4, 5, 6, 7, 8, 9]
falsy?

examples

falsy inquiry nothing

input

nothing.falsy?

result

true

false falsy

input

false.falsy?

result

true

true falsy check

input

true.falsy?

result

false

zero falsy check

input

0.falsy?

result

false

one falsy check

input

1.falsy?

result

false

array falsy check

input

[].falsy?

result

false

object falsy check

input

{}.falsy?

result

false

array falsy check

input

[1, 2, 3].falsy?

result

false

object falsy check

input

{ a: 1, b: 2 }.falsy?

result

false
inclusive_range

examples

inclusive range

input

1.inclusive_range(10).to_list

result

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
name

examples

integer name integer

input

Integer.name

result

"Integer"

boolean new name

input

Boolean.new.name

result

"Boolean"

boolean name

input

true.name

result

"Boolean"

dictionary name

input

{}.name

result

"Dictionary"
new

examples

true new false

input

true.new

result

false

false new true

input

false.new(true)

result

true

1 new 2

input

1.new(2)

result

2

integer new 2

input

Integer.new(2)

result

2

boolean new true

input

Boolean.new(true)

result

true
not

examples

not nothing true

input

not nothing

result

true

not true false

input

not true

result

false

not false true

input

not false

result

true
or

examples

true or false true

input

true or false

result

true

false or false false

input

false or false

result

false

true or true true

input

true or true

result

true

false or true true

input

false or true

result

true
self

examples

fsharp self

input

1.self

result

1

true self

input

true.self

result

true

self map ruby

input

[1, 2, 3].map(&:self)

result

[1, 2, 3]
strict_equal

examples

strict equal true

input

1.strict_equal(1)

result

true

strict equal false

input

2.strict_equal(1)

result

false
to_boolean

examples

false result

input

nothing.to_boolean

result

false

one to boolean

input

1.to_boolean

result

true

convert true

input

true.to_boolean

result

true
to_class

examples

integer to class

input

1.to_class

result

Code::Object::Integer

true to class boolean

input

true.to_class

result

Code::Object::Boolean

nothing to class

input

nothing.to_class

result

Code::Object::Nothing
to_date

examples

string to date conversion

input

"2025-06-15".to_date

result

2025-06-15
to_decimal

examples

to decimal

input

1.to_decimal

result

1.0
to_dictionary

examples

convert array to dictionary

input

[[:a, 1], [:b, 2]].to_dictionary

result

{}
to_duration

examples

to duration

input

1.to_duration

result

0
to_integer

examples

to integer conversion

input

1.2.to_integer

result

1
to_json

examples

to json

input

[1, 2, { a: 3 }].to_json

result

"[1,2,{\"a\":3}]"
to_list

examples

to list number

input

1.to_list

result

[]

true to list

input

true.to_list

result

[]

empty dictionary to list

input

{}.to_list

result

[]

dictionary to list

input

{ a: 1, b: 2 }.to_list

result

[["a", 1], ["b", 2]]
to_nothing

examples

dot to nothing

input

1.to_nothing

result

nothing

empty object to nothing

input

{}.to_nothing

result

nothing
to_parameter

examples

map keys to parameter format

input

{ a: 1 }.to_parameter

result

"a-1"
to_range

examples

to range

input

[1, 2].to_range

result

1..2
to_string

examples

one to string

input

1.to_string

result

"1"

nothing to string

input

nothing.to_string

result

""

array to string

input

[1, 2, 3].to_string

result

"[1, 2, 3]"
to_time

examples

datetime conversion

input

"2025-06-15 16:41".to_time

result

2025-06-15 16:41:00 UTC
truthy?

examples

nothing truthy

input

nothing.truthy?

result

false

false truthy

input

false.truthy?

result

false

true truthy

input

true.truthy?

result

true

zero truthy

input

0.truthy?

result

true

one truthy

input

1.truthy?

result

true

empty array truthy

input

[].truthy?

result

true

empty object truthy

input

{}.truthy?

result

true

array truthy

input

[1, 2, 3].truthy?

result

true

object truthy

input

{ a: 1, b: 2 }.truthy?

result

true
||

examples

false puts hello

input

false || puts(:hello)

output

hello

result

nothing

true or puts bye

input

true || puts(:bye)

result

true