add camelize and decamelize.

snippets/camelize.md

@@ -0,0 +1,17 @@
+### Camelize
+
+Camelize a string, cutting the string by multiple separators like
+ hyphens, underscores and spaces.
+
+```js
+/**
+ * @param {str} string str to camelize
+ * @return string Camelized text
+ */
+const camelize = str => str.replace(/^([A-Z])|[\s-_]+(\w)/g, 
+  (match, p1, p2, offset) =>  p2 ? p2.toUpperCase() : p1.toLowerCase());
+// camelize("some_database_field_name") -> 'someDatabaseFieldName'
+// camelize("Some label that needs to be camelized") -> 'someLabelThatNeedsToBeCamelized'
+// camelize("some-javascript-property") -> 'someJavascriptProperty'
+// camelize("some-mixed_string with spaces_underscores-and-hyphens") -> 'someMixedStringWithSpacesUnderscoresAndHyphens'
+```