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How to create a tuple with only one element
...Empty tuples are constructed by an empty pair of parentheses; a tuple with one item is constructed by following a value with a comma (it is not sufficient to enclose a single value in parentheses). Ugly, but effective.
If you truly hate the trailing comma syntax, a workaround is to pass a list to ...
Using two values for one switch case statement
... @trig lol. I'm doing that kind of thing a lot lately - blaming iPhone thumb typing. Cheers
– Bohemian♦
May 23 '13 at 12:17
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Scala how can I count the number of occurrences in a list
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A somewhat cleaner version of one of the other answers is:
val s = Seq("apple", "oranges", "apple", "banana", "apple", "oranges", "oranges")
s.groupBy(identity).mapValues(_.size)
giving a Map with a count for each item in the original sequence:
Map(b...
Copy folder structure (without files) from one location to another
I want to create a clone of the structure of our multi-terabyte file server. I know that cp --parents can move a file and it's parent structure, but is there any way to copy the directory structure intact?
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Perforce for Git users? [closed]
... new Perforce users coming from Git understand the new world they are in.
One brief detour before we dive in; if you prefer Git you can use Git with Perforce quite well. We provide a tool called Git Fusion that generates Git repositories that are kept in sync with the Perforce server. Git and Perfo...
Foreign key constraints: When to use ON UPDATE and ON DELETE
... on the database. You'll be sure to have a consistent database, and that's one of the good reasons to use a database. Especially if you have several applications requesting it (or just one application but with a direct mode and a batch mode using different sources).
With MySQL you do not have advan...
Can I change the size of UIActivityIndicator?
...spective, its usually better to leave these common standardized elements alone. User have been taught that certain elements appear in a certain size and that they mean specific things. Altering the standard appearance alters the interface grammar and confuses the user.
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How does one write code that best utilizes the CPU cache to improve performance?
...o avoid alignment holes (sorting your struct members by decreasing size is one way)
Beware of the standard dynamic memory allocator, which may introduce holes and spread your data around in memory as it warms up.
Make sure all adjacent data is actually used in the hot loops. Otherwise, consider brea...
How to have multiple data-bind attributes on one element?
I need to have multiple data bindings on one element. For example, I want a href as well as a html data-binding on one a tag. I have tried this,
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Avoid synchronized(this) in Java?
...int separately.
Some evil code may steal your lock (very popular this one, also has an
"accidentally" variant)
I'm more worried about accidentally. What it amounts to is that this use of this is part of your class' exposed interface, and should be documented. Sometimes the ability of othe...