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understanding the b a bit more well

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Jun 16.2016

Hey guys , i have been trying to work on my regex skills a bit , just had a small hiccup when i was trying to understand the followng regex outcome:

[CODE]
‘hello ! h’.match(/b/g)
[/CODE]

What i ofcoutse got was:

[CODE]
[“”, “”, “”, “”]
[/CODE]

now what exactly are those 4 matches ??

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3 Comments(s) ↴

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@KeverJun 16.2016 — Boundaries are at the start of a string, end of a string and between each word and non-word character.

'bhellob ! bhb'
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@gautamz07authorJun 16.2016 — ohh , makes it a bit more clear , just need a bit more clarity:

see below regex:

"hello ! hi mi".match(/b/g)

I get six matchs:

["", "", "", "", "", ""]

Now small modification .. lets add a ! to the tail .

"hello ! hi mi ! ".match(/b/g)

still i get:

["", "", "", "", "", ""]

So why is it that the space after ! is not being matched ?

Thank you.
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@KeverJun 16.2016 — Sorry, my explanation was a little to short.

Boundaries are at the start of a string (when the string start with a word character) or end of a string (when the string ends with a word character) and between each word and non-word character.

Word charachters are [A-Za-z0-9_]. The space is a non-word character.
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