askirmas /
postcss-d-ts
| Conditions | 10 |
| Total Lines | 54 |
| Code Lines | 45 |
| Lines | 0 |
| Ratio | 0 % |
| Changes | 0 | ||
Small methods make your code easier to understand, in particular if combined with a good name. Besides, if your method is small, finding a good name is usually much easier.
For example, if you find yourself adding comments to a method's body, this is usually a good sign to extract the commented part to a new method, and use the comment as a starting point when coming up with a good name for this new method.
Commonly applied refactorings include:
If many parameters/temporary variables are present:
Complex classes like rewrite.ts ➔ rewrite often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
| 1 | import {promisify} from "util" |
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| 12 | |||
| 13 | // TODO #12 with .trim() https://jsbench.me/fykmaajqmc/ |
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| 14 | |||
| 15 | async function rewrite(filename: string, lines: string[], eol: string, checkMode: boolean) { |
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| 16 | const {length} = lines |
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| 17 | , {length: eolLength} = eol |
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| 18 | , fileExists = await $exists(filename) |
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| 19 | |||
| 20 | let row = 0 |
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| 21 | , position = 0 |
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| 22 | |||
| 23 | if (fileExists) { |
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| 24 | const lineReader = createInterface({ |
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| 25 | input: createReadStream(filename), |
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| 26 | crlfDelay: Infinity, |
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| 27 | historySize: 0 |
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| 28 | }) |
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| 29 | |||
| 30 | let isSame = true |
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| 31 | |||
| 32 | for await (const line of lineReader) { |
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| 33 | if (line !== lines[row]) { |
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| 34 | isSame = false |
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| 35 | continue |
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| 36 | } |
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| 37 | row++ |
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| 38 | position += line.length |
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| 39 | } |
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| 40 | |||
| 41 | lineReader.close() |
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| 42 | |||
| 43 | if (isSame) { |
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| 44 | if (lines[row] === "") |
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| 45 | row++ |
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| 46 | if (length === row) |
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| 47 | return |
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| 48 | } |
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| 49 | |||
| 50 | !checkMode && await $truncate(filename, position + eolLength * (row - 1)) |
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| 51 | } |
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| 52 | |||
| 53 | if (checkMode) |
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| 54 | throw Error(`Content of "${filename}" should be another`) |
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| 55 | |||
| 56 | const fd = await $open(filename, "a") |
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| 57 | |||
| 58 | for (let i = row; i < length; i++) |
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| 59 | await $write(fd, `${ |
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| 60 | i ? eol : '' |
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| 61 | }${ |
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| 62 | lines[i] |
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| 63 | }`) |
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| 64 | |||
| 65 | await $close(fd) |
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| 66 | } |
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| 67 |
