⬜ Optional, 🟦 Required for all, 🟨 Required for js, 🟩 Learned, 🟥 Declined
| Syntax | Statements | Functions | Data structures | Process & style |
|---|---|---|---|---|
| 🟦 value | 🟦 if | 🟦 recursion | 🟦 array | 🟦 refactoring |
| 🟦 identifier | 🟦 loops | 🟦 function | 🟦 instance | 🟦 code review |
| 🟦 variable | 🟦 assignment | 🟦 return | 🟦 object | 🟦 antipatterns |
| 🟦 constant | 🟨 prototype | 🟦 signature | 🟦 collection | 🟦 paradigm |
| 🟦 scalar | 🟦 class | 🟦 argument | 🟦 hash table | 🟦 algorithm |
| 🟦 literal | 🟦 while | 🟦 parameter | 🟦 linked list | 🟦 magic numbers |
| 🟦 expression | 🟦 do..while | 🟦 pure | 🟦 queue | 🟦 hardcode |
| 🟦 heap | 🟦 for | 🟦 function | 🟦 stack | 🟦 complexity |
| 🟦 type | 🟨 for..in | 🟦 side effects | 🟦 deque | 🟦 decomposition |
| 🟦 primitive types | 🟨 for..of | 🟦 closure | 🟦 serialization | ⬜️ spaghetti |
| 🟦 reference | 🟨 for await | 🟦 partial | 🟦 mixin, extend | ⬜️ silver bullet |
| 🟦 flag | 🟦 throw | ⬜️ curry | 🟨 iterator | ⬜️ not invented here |
| 🟦 lexical scope | 🟦 try..catch | 🟦 chaining | 🟨 typed arrays | 🟦 dead code |
| 🟦 code block | 🟦 equality operators | 🟦 higher order | 🟨 Map | 🟦 unreachable code |
| 🟨 Object | 🟦 logical operators | 🟦 callback | 🟨 Set | 🟦 duplicate code |
| 🟨 this | 🟦 bitwise operators | 🟦 listener | ⬜️ weak collections | 🟦 exception |
| 🟨 arrow function | 🟦 break, continue | ⬜️ pipe | ⬜️ Proxy | 🟦 return early |
| 🟨 generator | 🟦 switch | ⬜️ memoize | ⬜️ Symbol | 🟦 linter |
| 🟨 async function | 🟨 new Error | 🟦 factory | 🟨 string parsing | ⬜️ prettier |
| 🟨 call, bind, apply | 🟦 pool | 🟨 timers | 🟦 unittest | |
| 🟨 Array | 🟦 wrapper | 🟨 EventEmitter | 🟦 git | |
| 🟨 instanceof | 🟨 default parameters | 🟨 RegExp | 🟦 github | |
| 🟨 ...spread | 🟦 lambda | 🟨 global | 🟨 node.js | |
| 🟨 ...rest | 🟨 undefined | 🟨 npm | ||
| 🟨 typeof | 🟦 null |