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What is the 'dynamic' type in C# 4.0 used for?
...ple case I run into often is constantly having to cast between decimal and double.
decimal foo = GetDecimalValue();
foo = foo / 2.5; // Does not compile
foo = Math.Sqrt(foo); // Does not compile
string bar = foo.ToString("c");
The second line does not compile because 2.5 is typed as a double and ...
Mongoose indexing in production code
Per the Mongoose documentation for MongooseJS and MongoDB / Node.js :
3 Answers
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What is the use of “assert” in Python?
...ear, rather than later as a side-effect of some other operation.
When you do...
assert condition
... you're telling the program to test that condition, and immediately trigger an error if the condition is false.
In Python, it's roughly equivalent to this:
if not condition:
raise AssertionE...
Android: ListView elements with multiple clickable buttons
...t 11:39 there is an excellent example: youtu.be/wDBM6wVEO70?t=11m39s Then do what @znq says...setTag() when the convertView==null and do getTag() in the onClick() method of the button's onClickListener(). Thank you!
– Shehaaz
Jun 1 '13 at 23:32
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A weighted version of random.choice
I needed to write a weighted version of random.choice (each element in the list has a different probability for being selected). This is what I came up with:
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How to validate an email address in JavaScript
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This regex eliminates valid, in-use emails. Do not use. Google for "RFC822" or "RFC2822" to get a proper regex.
– Randal Schwartz
Sep 8 '10 at 2:34
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Combining “LIKE” and “IN” for SQL Server [duplicate]
... I was looking for regex example inside the like but this will do for now !
– Pini Cheyni
Mar 24 '16 at 9:29
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How do I copy folder with files to another folder in Unix/Linux? [closed]
...py a folder with files in that folder into another folder. Command cp -r doesn't copy files in the folder.
3 Answers
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“find: paths must precede expression:” How do I specify a recursive search that also finds files in
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By way of example, you can see what's happening if you do echo *test.c ... the result won't be echo expanding the wildcard, but the shell itself. The simple lesson is if you're using wildcards, quote the filespec :-)
– Chris J
Jun 27 '11 at ...
Singletons vs. Application Context in Android?
...en mentioned as another problem, and since singletons imply "global" (= random) access to shared state, subtle bugs may arise when not properly synchronized in concurrent applications.
I consider it an anti-pattern, it's a bad object-oriented style that essentially amounts to maintaining global sta...