For example, today, a stone from the bedrock of FP: > ``` > let compose = (b, a) => (...as) => b(a(...as)) > ```
will cause a JS Stack Trace to go from something useful (space around useful line) like: > ``` > Error: Invariant Violation: createClass(...): Class specification must > implement a `render` method. > at invariant > (/Users/jasonkuhrt/code/test/node_modules/react/lib/invariant.js:42:15) > at ReactClass.createClass > (/Users/jasonkuhrt/code/test/node_modules/react/lib/ReactClass.js:898:46) > > at componentFactory > (/Users/jasonkuhrt/code/test/component-factory.js:1:36) > > at Object.<anonymous> (/Users/jasonkuhrt/code/test/test.js:4:1) > at Module._compile (module.js:460:26) > at normalLoader > (/usr/local/lib/node_modules/babel/node_modules/babel-core/lib/api/register/node.js:199:5) > at Object.require.extensions.(anonymous function) [as .js] > (/usr/local/lib/node_modules/babel/node_modules/babel-core/lib/api/register/node.js:216:7) > at Module.load (module.js:355:32) > at Function.Module._load (module.js:310:12) > at Function.Module.runMain (module.js:501:10) > ``` To something much less useful like this: > ``` > Error: Invariant Violation: createClass(...): Class specification must > implement a `render` method. > at invariant > (/Users/jasonkuhrt/code/test/node_modules/react/lib/invariant.js:42:15) > at ReactClass.createClass > (/Users/jasonkuhrt/code/test/node_modules/react/lib/ReactClass.js:898:46) > > at /Users/jasonkuhrt/code/test/component-factory.js:4:41 > > at Object.<anonymous> (/Users/jasonkuhrt/code/test/test.js:4:1) > at Module._compile (module.js:434:26) > at normalLoader > (/usr/local/lib/node_modules/babel/node_modules/babel-core/lib/api/register/node.js:199:5) > at Object.require.extensions.(anonymous function) [as .js] > (/usr/local/lib/node_modules/babel/node_modules/babel-core/lib/api/register/node.js:216:7) > at Module.load (module.js:355:32) > at Function.Module._load (module.js:310:12) > at Function.Module.runMain (module.js:475:10) > ``` And ultimately being in a real-life scenario/library/etc. (e.g. Ramda compose) leading to something almost useless: > ``` > Error: Invariant Violation: createClass(...): Class specification must > implement a `render` method. > at invariant > (/Users/jasonkuhrt/code/test/node_modules/react/lib/invariant.js:42:15) > at ReactClass.createClass > (/Users/jasonkuhrt/code/test/node_modules/react/lib/ReactClass.js:898:46) > > at /Users/jasonkuhrt/code/test/node_modules/ramda/dist/ramda.js:384:35 > at f1 > (/Users/jasonkuhrt/code/test/node_modules/ramda/dist/ramda.js:156:27) > > at Object.<anonymous> (/Users/jasonkuhrt/code/test/test.js:4:1) > at Module._compile (module.js:434:26) > at normalLoader > (/usr/local/lib/node_modules/babel/node_modules/babel-core/lib/api/register/node.js:199:5) > at Object.require.extensions.(anonymous function) [as .js] > (/usr/local/lib/node_modules/babel/node_modules/babel-core/lib/api/register/node.js:216:7) > at Module.load (module.js:355:32) > at Function.Module._load (module.js:310:12) > ``` _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
