So you want to be an Ethereum developer! Congrats, much treasure awaits you. Developing Ethereum dapps benefits from having a well-crafted development environment. This can often be daunting to beginners, so I'm giving you my favorite dev environment to help get you started.
Once your code fortress is constructed, you'll be able to
| vedo che c'è parecchia confusione su typescript, a partire da cosa sia. | |
| cercherò di fare chiarezza su cosa sia, a cosa serva e quali sono pro/contra di utilizzarlo: | |
| typescript, come flow, nasce come type system INCREMENTALE per javascript, il che significa aggiungere dei metadati nel codice che possano essere consumati da qualcuno (tsc per ts e babel via plugin per flow) in modo da rendere fortemente tipato un linguaggio che lo è solo debolmente, senza però obbligare lo sviluppatore a tipare tutta la codebase prima di utilizzarlo ma favorendo anche un ingresso graduale in progetti pre-esistenti. | |
| cosa è un tipo? semplicissimo: | |
| - "stringa" -> string | |
| - 42 -> number | |
| un po' meno semplice: |
| // Source: https://github.com/nodejs/node/blob/master/lib/child_process.js | |
| // Defines spawn_sync and normalizeSpawnArguments (without error handling). These are internal variables. | |
| spawn_sync = process.binding('spawn_sync'); normalizeSpawnArguments = function(c,b,a){if(Array.isArray(b)?b=b.slice(0):(a=b,b=[]),a===undefined&&(a={}),a=Object.assign({},a),a.shell){const g=[c].concat(b).join(' ');typeof a.shell==='string'?c=a.shell:c='/bin/sh',b=['-c',g];}typeof a.argv0==='string'?b.unshift(a.argv0):b.unshift(c);var d=a.env||process.env;var e=[];for(var f in d)e.push(f+'='+d[f]);return{file:c,args:b,options:a,envPairs:e};} | |
| // Defines spawnSync, the function that will do the actual spawning | |
| spawnSync = function(){var d=normalizeSpawnArguments.apply(null,arguments);var a=d.options;var c;if(a.file=d.file,a.args=d.args,a.envPairs=d.envPairs,a.stdio=[{type:'pipe',readable:!0,writable:!1},{type:'pipe',readable:!1,writable:!0},{type:'pipe',readable:!1,writable:!0}],a.input){var g=a.stdio[0]=util._extend({},a.stdio[0]) |
By: @BTroncone
Also check out my lesson @ngrx/store in 10 minutes on egghead.io!
Update: Non-middleware examples have been updated to ngrx/store v2. More coming soon!
Table of Contents
| function mapValues(obj, fn) { | |
| return Object.keys(obj).reduce((result, key) => { | |
| result[key] = fn(obj[key], key); | |
| return result; | |
| }, {}); | |
| } | |
| function pick(obj, fn) { | |
| return Object.keys(obj).reduce((result, key) => { | |
| if (fn(obj[key])) { |
| function *fibonacci(n) { | |
| const infinite = !n && n !== 0; | |
| let current = 0; | |
| let next = 1; | |
| while (infinite || n--) { | |
| yield current; | |
| [current, next] = [next, current + next]; | |
| } | |
| } |
| // Just before switching jobs: | |
| // Add one of these. | |
| // Preferably into the same commit where you do a large merge. | |
| // | |
| // This started as a tweet with a joke of "C++ pro-tip: #define private public", | |
| // and then it quickly escalated into more and more evil suggestions. | |
| // I've tried to capture interesting suggestions here. | |
| // | |
| // Contributors: @r2d2rigo, @joeldevahl, @msinilo, @_Humus_, | |
| // @YuriyODonnell, @rygorous, @cmuratori, @mike_acton, @grumpygiant, |
