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Update toDecimalMark.md

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David Wu
2017-12-21 15:37:35 +01:00
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commit 07337c25b5
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snippets/toDecimalMark.md
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@ -1,8 +1,8 @@
### toDecimalMark ### toDecimalMark
Use commas to separate digits。 Convert a float-point arithmetic to the [Decimal mark](https://en.wikipedia.org/wiki/Decimal_mark) form.
Use `toString()` to convert the number `num` to a string, then use `/\B(?=(\d{3})+(?!\d))/g` to separate every three characters with a comma,except word boundary。 Use `toString()` to convert the float `num` to a string, then use regex to separate every three characters of the integer part with a comma.
```js ```js
const toDecimalMark = (num) => { const toDecimalMark = (num) => {
@ -11,7 +11,6 @@ const toDecimalMark = (num) => {
let decNum = `.${cleanNum.split('.')[1]}` let decNum = `.${cleanNum.split('.')[1]}`
return wholeNum + decNum; return wholeNum + decNum;
} }
// toDecimalMark(12305030388.9087) //-> '12,305,030,388.9087' // toDecimalMark(12305030388.9087) //-> '12,305,030,388.9087'
// toDecimalMark(123.889087e2) //-> '12,388.9087' // toDecimalMark(123.889087e2) //-> '12,388.9087'
// toDecimalMark('12305abc030388.9087') // -> '12,305,030,388.9087' // toDecimalMark('12305abc030388.9087') // -> '12,305,030,388.9087'