Trying to get a regex to recognize and extract words from both camelCase and CamelCase

Question

I've got this halfway working. This works great:

'MyOwnVar'.match(/([a-z]*)([A-Z][a-z]+)/g)

Result:

["My", "Own", "Var"]

The goal is to pull out the individual words. But if I pass a camelCase name to it:

'myOwnVar'.match(/([a-z]*)([A-Z][a-z]+)/g)

I get:

["myOwn", "Var"]

I can't figure out what I'm doing wrong. As far as I can tell, two sets of () should store the matching results in two separate array elements. It's lumping them in together for some reason.

Answer 1

If I have understood the question properly the following regex should do the trick:

/([A-Za-z][a-z]+)/g

In case that a single character (as "m" in "mOwnVariable") should be considered as a word:

/([A-Za-z][a-z]*)/g

Answer 2

You can use

/([A-Z]?[a-z]+)/g

See regex explanation https://regex101.com/r/zS8vJ3/1

// For camelCase
var matches = 'myOwnVar'.match(/([A-Z]?[a-z]+)/g);
document.write('// For camelCase<pre>' + JSON.stringify(matches, 0, 2) + '</pre>');


// For CamelCase
var matches = 'MyOwnVar'.match(/([A-Z]?[a-z]+)/g);
document.write('<hr /> // For CamelCase <pre>' + JSON.stringify(matches, 0, 2) + '</pre>');