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When is memoization automatic in GHC Haskell?
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GHC does not memoize functions.
It does, however, compute any given expression in the code at most once per time that its surrounding lambda-expression is entered, or at most once ever if it is at top level. Determining where the lambda-expressions are can be a little trick...
How to change the Text color of Menu item in Android?
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I am still completely unable to change the text color. My overall theme textcolor just takes preference. Any help? None of these answers work.
– David P
Jun 21 '17 at 7:26
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What is Vim recording and how can it be disabled?
...at you can yank text from the editor into a register, then execute it as a command.
– Cascabel
Oct 6 '09 at 20:13
68
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In git, is there a simple way of introducing an unrelated branch to a repository?
...anch>, started from
<start_point> and switch to it. The
first commit made on this new branch
will have no parents and it will be
the root of a new history totally
disconnected from all the other
branches and commits.
This doesn't do exactly what the asker wanted, because it po...
Standard concise way to copy a file in Java?
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As toolkit mentions above, Apache Commons IO is the way to go, specifically FileUtils.copyFile(); it handles all the heavy lifting for you.
And as a postscript, note that recent versions of FileUtils (such as the 2.0.1 release) have added the use of NIO for ...
How do you track record relations in NoSQL?
...e: if it's more important for data to have cohesion (think of values in a comma-separated list instead of a normalized table), then do it that way.
But this inevitably optimizes for one type of query (e.g. comments by any user for a given article) at the expense of other types of queries (comments...
Shell script to send email [duplicate]
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Yes it works fine and is commonly used:
$ echo "hello world" | mail -s "a subject" someone@somewhere.com
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Launch an app from within another (iPhone)
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As Kevin points out, URL Schemes are the only way to communicate between apps. So, no, it's not possible to launch arbitrary apps.
But it is possible to launch any app that registers a URL Scheme, whether it's Apple's, yours, or another developer's. The docs are here:
Commu...
Get all child views inside LinearLayout at once
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