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1
vote
What is the purpose of .get(0) method while creating the instance of the 2D map?
It sounds like what you mean to ask is, "Why not use .get() without any arguments, since there's only one element to choose from?" Well, you could do that, but there are a few good reasons to use .get …
2
votes
Accepted
Can you have a CSS class name with a space?
The allowed CSS grammar is documented here. This is the important part:
nmchar [_a-z0-9-]|{nonascii}|{escape}
This is regular expression syntax, which says that the allowable characters are ei …