prefer-specific-method SKILL.md skillA
prefer-specific-method from ncaq/konoka is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add ncaq/konoka/prefer-specific-method@git:20260604.ace2746Pins git:20260604.ace2746 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- ncaq/konoka
- Path
plugins/web-tasuke/skills/prefer-specific-method/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260604.ace2746, committed Jun 4, 2026
- Size
- 5,507 bytes
- Repository stars
- 3
- License
- Apache-2.0
Prefer the most specific built-in method over general-purpose ones in TypeScript/JavaScript. Use includes over indexOf, some over filter().length, find over filter()[0], flatMap over map().flat(), at(-1) over length-based access, startsWith/endsWith/includes over indexOf on strings, structuredClone over JSON round-trip. Use when writing or reviewing code that searches, tests, transforms arrays, objects, or strings.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# より特化した関数を優先する
同じ結果が得られる方法が複数ある場合は、
やりたいことに最も特化した関数を選んでください。
特化した関数は名前そのものが意図を表すので、
読み手が「この比較は何のためか」を推測せずに済みます。
汎用的な関数を条件式と組み合わせて目的を表現すると、
意図が式の形に埋もれて読みにくくなります。
これは[avoid-for](../avoid-for/SKILL.md)で`for`を高抽象度の関数に置き換えるのと同じ発想を、
関数同士の選択にも広げたものです。
## 存在するかどうかを調べる
要素が含まれるかを知りたいだけなら、
位置を返す`indexOf`ではなく、
真偽値を返す`includes`を使います。
```typescript
// 避ける
if (items.indexOf(target) !== -1) {
}
// 良い
if (items.includes(target)) {
}
```
`includes`は意図が明確なだけでなく、
`NaN`を正しく見つけられるという正確性の利点もあります。
`indexOf`は厳密等価(`===`)で比較するため`NaN`を見つけられませんが、
`includes`はSameValueZeroで比較するため`NaN`も見つけられます。
```typescript
[NaN].indexOf(NaN); // -1 (見つからない)
[NaN].includes(NaN); // true
```
## 条件を満たす要素の有無を調べる
絞り込んだ結果の件数を見るのではなく、
`some`や`every`で真偽を直接求めます。
```typescript
// 避ける
if (0 < users.filter((user) => user.active).length) {
}
// 良い
if (users.some((user) => user.active)) {
}
```
`some`は最初に条件を満たした時点で打ち切るので、
全件を絞り込む`filter`より無駄がありません。
「すべてが条件を満たすか」は`every`を使います。
## 条件を満たす最初の要素を取り出す
絞り込んでから先頭を取るのではなく、
`find`で直接取り出します。
```typescript
// 避ける
const found = users.filter((user) => user.id === targetId)[0];
// 良い
const found = users.find((user) => user.id === targetId);
```
最後の要素が欲しい場合は`findLast`、
…Read the whole file at its exact version.
How to install
mdr add ncaq/konoka/prefer-specific-method@sha256:f5bbfee78eb5f03fThe line at the top of this page pins the label git:20260604.ace2746, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_xlmsa4kdomjux3ky)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Jun 4, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5507 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
ncaq/konoka · 3 stars · license Apache-2.0 · pushed 2026-10-19 · branch master
API
GET https://markdownregistry.com/api/v1/artifacts/art_xlmsa4kdomjux3ky GET https://markdownregistry.com/api/v1/resolve?ref=ncaq/konoka/prefer-specific-method GET https://markdownregistry.com/api/v1/blob/f5bbfee78eb5f03f754144220e9951a8bf0fd41dc954b33cfd22c03d1b6d6c74
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.