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How to Generate unique file names in C#
...e:
public string GenerateFileName(string context)
{
return context + "_" + DateTime.Now.ToString("yyyyMMddHHmmssfff") + "_" + Guid.NewGuid().ToString("N");
}
filename1 = GenerateFileName("MeasurementData");
filename2 = GenerateFileName("Image");
This way, when I sort by filename, it will aut...
Good ways to manage a changelog using git?
...orate --color
Piping that output to ChangeLog is what I currently use in all my projects, it's simply amazing.
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In git, what is the difference between merge --squash and rebase?
...-squash with --commit."));
git rebase --interactive
replays some or all of your commits on a new base, allowing you to squash (or more recently "fix up", see this SO question), going directly to:
git checkout tmp
git rebase -i stable
stable
X-------------------G tmp
/ ...
Naming “class” and “id” HTML attributes - dashes vs. underlines [closed]
...roblem and you could run into the same issue later where you would accidentally access an HTML Object instead of a JavaScript one
One remark, you can still access the HTML objects through the (for example) window object by using window['message-text'];
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How can I handle R CMD check “no visible binding for global variable” notes when my ggplot2 syntax i
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Just another warning. aes_string does not allow you to use functions to manipulate the x and y values. Say that you would like to log transform y in which case aes_string(x = 'x.values', y='log(y.values)') of course doesn't work. I use these kind of transformations a...
Exact difference between CharSequence and String in java [duplicate]
...h can be modified
Any method which accepts a CharSequence can operate on all of these equally well. Any method which only accepts a String will require conversion. So using CharSequence as an argument type in all the places where you don't care about the internals is prudent. However you should us...
How to free memory in Java?
...
Java uses managed memory, so the only way you can allocate memory is by using the new operator, and the only way you can deallocate memory is by relying on the garbage collector.
This memory management whitepaper (PDF) may help explain what's going on.
You can also call Sy...
Checking network connection
...t have a working internet connection, the DNS lookup itself may block the call to urllib_request.urlopen for more than a second. Thanks to @rzetterberg for pointing this out.
If the fixed IP address above is not working, you can find a current IP address for google.com (on unix) by running
% dig...
How to decode Unicode escape sequences like “\u00ed” to proper UTF-8 encoded characters?
...PHP that can decode Unicode escape sequences like " \u00ed " to " í " and all other similar occurrences?
7 Answers
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typeof !== “undefined” vs. != null
...gument, or as a global variable), I think the best way to do it is:
if (my_variable === undefined)
jQuery does it, so it's good enough for me :-)
Otherwise, you'll have to use typeof to avoid a ReferenceError.
If you expect undefined to be redefined, you could wrap your code like this:
(functi...