promise(A+) for lua. like ES6
run in esp8266
# install dependencies
luarocks install lua-promise- In NodeMcu
1.Download
lua-promise.lua
2.Open in ESPlorer and
Save to ESP
3.Restart
ESPXXXX
- For the Promsie class, call with '.'
Promise.new(executor)
promise = Promise.new(function(resolve, reject) .. end);
Promise.all(array)
promise = Promise.all(array) -- a table as array
Promise.race(array)
promise = Promise.race(array) -- a table as array
Promise.reject(reason)
promise = Promise.reject(reason); -- reason is anything
Promise.resolve(value)
promise = Promise.resolve(value); promise = Promise.resolve(promise);
- For promise instance, call with ':'
promise:next(onResolve, onRejecte)
promise2 = promise:next(functoin(value) ... end); promise2 = promise:next(nil, functoin(reason) ... end);
promise:catch(onRejecte)
promise2 = promise:catch(functoin(reason) ... end)
example
Promise = require('lua-promise')
login = Promise.resolve({err = 0, data = {id = '1001', name = 'admin'}}):next(function (ret)
if(ret.err == 0) then
-- login success
return ret.data.id
else
error(ret)
end
end)
getMenuConfig = function(id)
return Promise.resolve({home = '/home/'..id..'.html'})
end
getNickName = function (id)
return Promise.resolve('nickName'..id)
end
login:next(getMenuConfig):next(function (menu)
print(menu.home)
end)
login:next(getNickName):next(function (nickName)
print(nickName)
end)test code
Promise = require('lua-promise')
Promise.new(function (resolve, reject)
resolve('aaaa')
end):next(function (ret)
print('1', ret)
return Promise.resolve('bbbb'):next(function (ret0)
print('1.1', ret0)
return ret0..'cccc'
end)
end):next(function (ret)
print('2', ret)
return Promise.reject({code = -1})
end):catch(function(err)
print('err', err, err.code)
return '000'
end):next(function (ret)
print('3', ret)
return 0 / nil
end):next(function (ret)
print('4', ret)
end):catch(function(err)
print('err2', err)
end)
Promise.all({Promise.resolve(1), Promise.resolve(2)}):next(function (rets)
for i = 1, #rets do
print('rets', rets[i])
end
end)
Promise.race({Promise.resolve('a'), Promise.reject('b'), Promise.resolve('c')}):next(function (ret)
print(ret)
end):catch(function(err)
print('err', err)
end)
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