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30-seconds-of-code/snippets/decamelize.md
2017-12-16 21:24:29 +08:00

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### decamelize
Decamelizes a string with/without a custom separator (underscore by default).
```js
const decamelize = (str, separator) => {
separator = typeof separator === 'undefined' ? '_' : separator;
return str
.replace(/([a-z\d])([A-Z])/g, '$1' + separator + '$2')
.replace(/([A-Z]+)([A-Z][a-z\d]+)/g, '$1' + separator + '$2')
.toLowerCase();
}
// decamelize('someDatabaseFieldName', ' ') -> 'some database field name'
// decamelize('someLabelThatNeedsToBeCamelized', '-') -> 'some-label-that-needs-to-be-camelized'
// decamelize('someJavascriptProperty', '_') -> 'some_javascript_property'
```