refactor(topics): 멀티 에이전트용 지식 재편 — _Common(공통 기본기) + Domain_* 구조
에이전트 8종(대화형/프로그래머 C·S/디자이너/설계자/기획자/QA/PD/PM)에게 [공통 기본 능력 + 롤별 Specialty] 2층으로 지식을 주입하기 위한 재분류. 문서 내용·포맷은 무수정, 폴더 이동만 (6,372개 문서 수 보존 확인). - Topic_Programming → Domain_Programming (내부 구조 보존) - Topic_Graphic → Domain_Design - Topic_Business → Domain_Product - Topic_General → Domain_General - _Common 신설: Math(구 Topic_Math_Specialty), Reasoning(구 General/From_Thinking & Reasoning), Reasoning_Creativity(구 General/From_창의성), Communication(Poetic_Blog_Writing + From_writing) - 타 도메인의 From_* 폴더는 유지 (출처 표기일 뿐, 이미 도메인에 맞게 분류된 문서) - 빈 폴더 정리 (memory/procedures) - 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Antigravity Agent
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---
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id: javascript-loops
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title: "JavaScript Loops"
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category: "Frontend"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["loops", "JS loops", "for loop", "while loop", "do while", "iteration"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.88
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created_at: 2026-06-23
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updated_at: 2026-06-23
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review_reason: ""
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merge_history: []
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tags: ["javascript", "js", "web", "frontend", "w3schools", "loops", "iteration", "control-flow"]
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raw_sources: ["https://www.w3schools.com/js/js_loops.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[JavaScript Loops]]
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## 🎯 한 줄 통찰 (One-line insight)
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Loops let you run the same block of code many times, each time with a different value — replacing long repetitive sequences with a compact iteration. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **Loops repeat a block of code** — they execute a code block multiple times, often with a different value each pass. [S1]
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- **`for` loop** — uses three expressions: an initializer, a condition, and an update run after each iteration. [S1]
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- **`while` loop** — runs as long as a specified condition is true. [S1]
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- **`do/while` loop** — a variant that runs the block at least once before checking the condition. [S1]
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- **Loop scope** — variables declared with `let` inside a loop are visible only within the loop, unlike `var`. [S1]
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- **Infinite-loop hazard** — forgetting to update the condition variable means the loop never ends and crashes the browser. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Replace repetition with iteration** — instead of writing the same statement for each array index, loop over `cars.length`. [S1]
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- **Index accumulation** — append each iteration's value into a result string (`text += ...`). [S1]
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- **Always advance the condition variable** — increment (e.g. `i++`) so the condition eventually becomes false. [S1]
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## 📖 세부 내용 (Details)
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**Why loops** [S1]
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Loops are handy if you want to run the same code over and over again, each time with a different value. Instead of writing the same statement many times:
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```javascript
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text += cars[0] + "<br>";
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text += cars[1] + "<br>";
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text += cars[2] + "<br>";
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text += cars[3] + "<br>";
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text += cars[4] + "<br>";
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text += cars[5] + "<br>";
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```
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You can write:
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```javascript
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for (let i = 0; i < cars.length; i++) {
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text += cars[i] + "<br>";
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}
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```
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**The `for` loop** [S1]
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The `for` loop has the syntax `for (expr1; expr2; expr3) { // code block to be executed }`.
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```javascript
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for (let i = 0; i < 5; i++) {
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text += "The number is " + i + "<br>";
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}
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```
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**Loop scope — `var` vs `let`** [S1]
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Using `var` in a loop, the loop variable redeclares the outer variable:
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```javascript
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let i = 5;
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for (i = 0; i < 10; i++) {
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// some code
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}
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// Here i is 10
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```
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Using `let` in a loop, the loop variable is scoped only to the loop:
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```javascript
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let i = 5;
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for (let i = 0; i < 10; i++) {
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// some code
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}
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// Here i is 5
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```
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**The `while` loop** [S1]
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The `while` loop has the syntax `while (condition) { // code block to be executed }`.
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```javascript
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while (i < 10) {
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text += "The number is " + i;
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i++;
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}
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```
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Note: If you forget to increase the variable used in the condition, the loop will never end. This will crash your browser.
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**The `do/while` loop** [S1]
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The `do/while` loop has the syntax `do { // code block to be executed } while (condition);`.
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```javascript
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do {
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text += "The number is " + i;
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i++;
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}
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while (i < 10);
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```
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Note: The `do while` runs at least once, even if the condition is false from the start.
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**Different kinds of loops** [S1]
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JavaScript supports the `for` loop (loops through a block of code a number of times), the `for/in` loop (loops through the properties of an object), the `for/of` loop (loops through the values of an iterable object), the `while` loop (loops through a block of code while a condition is true), and the `do/while` loop (also loops while a condition is true).
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## 🛠️ 적용 사례 (Applied in summary)
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The page's own snippets are the canonical applied examples — replacing repeated `text += cars[n]` statements with a `for` loop over `cars.length`, and accumulating numbers in `for`/`while`/`do-while` loops. No external project/commit applications found in the source.
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## 💻 코드 패턴 (Code patterns)
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Iterate an array:
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```javascript
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for (let i = 0; i < cars.length; i++) {
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text += cars[i] + "<br>";
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}
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```
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While loop with advancing counter:
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```javascript
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while (i < 10) {
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text += "The number is " + i;
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i++;
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}
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```
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Do-while (runs at least once):
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```javascript
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do {
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text += "The number is " + i;
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i++;
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}
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while (i < 10);
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```
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## ⚖️ 비교 및 선택 기준 (Comparison & decision criteria)
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- **`for` vs `while`** — use `for` when the number of iterations / the counter is known up front (init, condition, update in one place); use `while` when looping purely on a condition. [S1]
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- **`while` vs `do/while`** — use `do/while` when the block must run at least once even if the condition is initially false. [S1]
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- **`let` vs `var` for the loop variable** — `let` keeps the counter scoped to the loop; `var` leaks it to the surrounding scope. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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No contradictions found in the source.
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual (실제 적용 사례 발견 시 applied/validated로 승격 가능)
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.88
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[JavaScript Tutorial]]
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- **관련 개념:** [[JavaScript For Loop]], [[JavaScript While Loop]], [[JavaScript Break]], [[JavaScript Booleans]]
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- **참조 맥락:** The overview entry point for all iteration constructs; specific loop types are detailed in their own pages.
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## 📚 출처 (Sources)
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- [S1] W3Schools — JavaScript Loops — https://www.w3schools.com/js/js_loops.asp
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## 📝 변경 이력 (Change history)
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- 2026-06-23: Initial draft synthesized from the W3Schools "JavaScript Loops" page (Astra wiki-curation, P-Reinforce v3.1 format).
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