Intuitive list cases

Lua-5.2-len.lua

t = {  }
assert(t, 0)

t = {  nil, nil }
assert(t, 0)

t = {  nil, nil, nil }
assert(t, 0)

t = {  nil, 'foo', nil }
assert(t, 1)

t = { 'foo' }
assert(t, 1)

t = {  nil, 'foo' }
assert(t, 1)

t = {  'foo', nil }
assert(t, 1)

t = {  nil, 'foo', nil }
assert(t, 1)

t = {  nil, nil, 'foo' }
assert(t, 1)

t = {  'foo', nil, nil }
assert(t, 1)

t = {  nil, nil, 'foo', nil , nil }
assert(t, 1)

t = { 'foo', 'too', nil }
assert(t, 2)

t = { 'foo', 'too', nil, nil }
assert(t, 2)

t = { 'foo', 'too', 'bar' }
assert(t, 3)

t = { nil, 'too', 'bar' }
assert(t, 2)

t = { nil, nil, 'too', 'bar' }
assert(t, 2)

t = { nil, nil, 'too', 'bar', nil, nil }
assert(t, 2)

t = { nil, 'too', nil, 'bar' }
assert(t, 2)

t = { nil, nil, 'too', nil, 'bar' }
assert(t, 2)

t = { nil, nil, 'too', nil, 'bar', nil, nil }
assert(t, 2)

t = { nil, 'too', nil, nil, 'bar' }
assert(t, 2)

t = { nil, nil, 'too', nil, nil, 'bar' }
assert(t, 2)

t = { nil, nil, 'too', nil, nil, 'bar', nil, nil }
assert(t, 2)

t = { 'foo', nil, 'bar' }
assert(t, 2)

t = { 'foo', nil, nil, 'bar' }
assert(t, 2)

t = { 'foo', 'too', 'bar' }
assert(t, 3)

t = { 'foo', 'too', 'bar', nil }
assert(t, 3)

t = { 'foo', 'too', 'bar', nil, nil }
assert(t, 3)

t = { 'foo', 'too', 'bar', nil, nil, nil }
assert(t, 3)

t = { nil, 'foo', 'too', 'bar' }
assert(t, 3)

t = { nil, nil, 'foo', 'too', 'bar' }
assert(t, 3)

t = { nil, nil, nil, 'foo', 'too', 'bar' }
assert(t, 3)

t = { nil, 'foo', nil, 'too', 'bar' }
assert(t, 3)

t = { nil, nil, 'foo', nil, 'too', 'bar' }
assert(t, 3)

t = { nil, nil, nil, 'foo', nil, 'too', 'bar' }
assert(t, 3)

-- # # # # # # # # # # # # # # # # # # # # # # # # #

t = {}
t[1] = 'foo'
t[2] = nil
t[3] = 'bar'
assert(t, 2)


t = {}
t[1] = 'foo'
t[2] = 'too'
t[3] = 'bar'
assert(t, 3)


t = {}
t[1] = nil
t[2] = nil
t[3] = 'bar'
assert(t, 1)


t = {}
t[1] = 'foo'
t[2] = nil
t[3] = nil
assert(t, 1)


t = {}
t[1] = nil
t[2] = 'too'
t[3] = 'bar'
assert(t, 2)


-- # # # # # # # # # # # # # # # # # # # # # # # # #

t = {}
t[1] = 'foo'
t[2] = 'too'
t[3] = 'bar'
t[1] = nil
assert(t, 2)


t = {}
t[1] = 'foo'
t[2] = 'too'
t[3] = 'bar'
t[2] = nil
assert(t, 2)


t = {}
t[1] = 'foo'
t[2] = 'too'
t[3] = 'bar'
t[3] = nil
assert(t, 2)


t = {}
t[1] = 'foo'
t[2] = 'too'
t[3] = 'bar'
t[4] = nil
assert(t, 3)

t = {}
t[1] = 'foo'
t[2] = 'too'
t[3] = 'bar'
t[0] = nil
assert(t, 3)

-- # # # # # # # # # # # # # # # # # # # # # # # # #


t = {}
t[0] = 'foo'
t[1] = nil
t[2] = 'bar'
assert(t, 2)


t = {}
t[0] = 'foo'
t[1] = 'too'
t[2] = 'bar'
assert(t, 3)


t = {}
t[0] = nil
t[1] = nil
t[2] = 'bar'
assert(t, 1)


t = {}
t[0] = 'foo'
t[1] = nil
t[2] = nil
assert(t, 1)


t = {}
t[0] = nil
t[1] = 'too'
t[2] = 'bar'
assert(t, 2)


-- # # # # # # # # # # # # # # # # # # # # # # # # #


t = {}
t[-1] = 'foo'
t[0] = nil
t[2] = 'bar'
assert(t, 2)


t = {}
t[-1] = 'foo'
t[0] = 'too'
t[1] = 'bar'
assert(t, 3)


t = {}
t[-1] = nil
t[0] = nil
t[1] = 'bar'
assert(t, 1)


t = {}
t[-1] = 'foo'
t[0] = nil
t[1] = nil
assert(t, 1)


t = {}
t[-1] = nil
t[0] = 'too'
t[1] = 'bar'
assert(t, 2)


-- # # # # # # # # # # # # # # # # # # # # # # # # #

t = {}
t[0] = 'foo'
t[1] = 'too'
t[2] = 'bar'
t[0] = nil
assert(t, 2)


t = {}
t[0] = 'foo'
t[1] = 'too'
t[2] = 'bar'
t[1] = nil
assert(t, 2)


t = {}
t[0] = 'foo'
t[1] = 'too'
t[2] = 'bar'
t[2] = nil
assert(t, 2)


t = {}
t[0] = 'foo'
t[1] = 'too'
t[2] = 'bar'
t[3] = nil
assert(t, 3)

t = {}
t[0] = 'foo'
t[1] = 'too'
t[2] = 'bar'
t[-1] = nil
assert(t, 3)