[Vi-Sion]

I agree with both of you, learning a language and stop using it will lead you to forgetting it .

[DarSider]

Hi
If you work hard on it you can progress faster than you imagine. It's the same for real languages, i started a foreign language alone at home and i was working everyday, stuffs that looked very hard looks simple now. Btw, learning JS language in 5 days might be possible, but doing whatever you want in JS within one week is impossible, you need to work on projects because there are a lot of ideas which you can't catch if you haven't practiced the language.
Peace <3

[Vi-Sion]

Thanks for your reply @DarSider much appreciated.

[Bish0pQ]

I do think this is possible. Not everything of course, but if you can really dedicate yourself into learning the full 25 hours you can definitly get a good base.
As others have mentioned, keep learning the language, also a quick tip: Don't try to learn too much languages at once as after some time you'll get confused.

You can better stick to 1 or 2 languages untill you know them descent enough to not forget them after a week.

[Bish0pQ]

I usually try to keep up my programming languages by coding programs in that languages and train my languages that way.