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What is the best way to use a HashMap in C++?
... as the map grows larger. For example, if it takes 1 microsecond to lookup one of 1 million items, then you can expect it to take around 2 microseconds to lookup one of 2 million items, 3 microseconds for one of 4 million items, 4 microseconds for one of 8 million items, etc.
From a practical viewp...
HTML text input allow only numeric input
... this.oldSelectionStart = this.selectionStart;
this.oldSelectionEnd = this.selectionEnd;
} else if (this.hasOwnProperty("oldValue")) {
this.value = this.oldValue;
this.setSelectionRange(this.oldSelectionStart, this.oldSelectionEnd);
} else {
this.valu...
When to use RSpec let()?
... means that if you fat finger the spelling of the instance variable, a new one will be created and initialized to nil, which can lead to subtle bugs and false positives. Since let creates a method, you'll get a NameError when you misspell it, which I find preferable. It makes it easier to refactor...
increment date by one month
...nd added more comments to help me understand it all. In case that helps anyone, I have posted it further down (tried to add it here but it was too long).
– Greg
Nov 13 '16 at 20:11
...
How to keep a .NET console app running?
...U resources and slows down your program.
I would definitely say the first one.
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When is it right for a constructor to throw an exception?
... into a usable state. There are basically two schools of thought on this.
One group favors two-stage construction. The constructor merely brings the object into a sleeper state in which it refuses to do any work. There's an additional function that does the actual initialization.
I've never unders...
How to find/identify large commits in git history?
...`echo -e "\n"`
output="${output}\n${size},${compressedSize},${other}"
done
echo -e $output | column -t -s ', '
That will give you the object name (SHA1sum) of the blob, and then you can use a script like this one:
Which commit has this blob?
... to find the commit that points to each of...
Switch statement: must default be the last case?
...tements. Especially interesting is 6.8.1.4, which enables the already mentioned Duff's Device:
Any statement may be preceded by a
prefix that declares an identifier as
a label name. Labels in themselves do
not alter the flow of control, which
continues unimpeded across them.
Edit: The...
Why does Git say my master branch is “already up to date” even though it is not?
...ting and/or misunderstanding what git does and why it does it.
When you clone some other repository, git makes a copy of whatever is "over there". It also takes "their" branch labels, such as master, and makes a copy of that label whose "full name" in your git tree is (normally) remotes/origin/mas...
Git rebase: conflicts keep blocking progress
...I want to get into v4. So, in v4, I tried to do a rebase from master, and one file keeps screwing things up: a one-line text file, that contains the version number. This file is app/views/common/version.txt , which before rebasing contains this text:
...