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What does the “Just” syntax mean in Haskell?
...r integer functions that are meant to return Natural numbers (for example, String.indexOf - when a substring is not found, the returned index is commonly designed to be negative)
return a special value (pointer): NULL or some such
silently return without doing anything: for example, lend could be wr...
How to get RelativeLayout working with merge and include?
..., unfortunately. As you can't have a View as the xml root, we must have an extra ViewGroup there...
– Rafael Nobre
Jul 24 '13 at 13:20
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Do the JSON keys have to be surrounded by quotes?
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You are correct to use strings as the key. Here is an excerpt from RFC 4627 - The application/json Media Type for JavaScript Object Notation (JSON)
2.2. Objects
An object structure is represented as a pair of curly brackets
surrounding...
Calendar Recurring/Repeating Events - Best Storage Method
...e | type | possible_keys | key | key_len | ref | rows | Extra |
+----+-------------+-------+--------+---------------+---------+---------+------------------+------+--------------------------------+
| 1 | SIMPLE | EM1 | ALL | NULL | NULL ...
Permission denied on accessing host directory in Docker
...er, this specific case is different.
The dot at the end of the permission string, drwxr-xr-x., indicates SELinux is configured. When using a host mount with SELinux, you need to pass an extra option to the end of the volume definition:
The z option indicates that the bind mount content is sh...
How to get complete month name from DateTime
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Use the "MMMM" custom format specifier:
DateTime.Now.ToString("MMMM");
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What is the difference between pull and clone in git?
... deal, I will do a "git init" first! Then we are the same. Plus I have the extra 'merge' capability on existing repo! Which makes me the most used command in Git ;)
Git creators: Hold your horses Mr Pull, if --bare or --mirror is used with clone or init, your merge won't happen. It remains read-o...
How can I split a JavaScript string by white space or comma?
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String.split can also accept a regular expression:
input.split(/[ ,]+/);
This particular regex splits on a sequence of one or more commas or spaces, so that e.g. multiple consecutive spaces or a comma+space sequence do not...
usr/bin/ld: cannot find -l
... not be appropriate to change the Makefile with the -Loption. I had put my extra library in /opt/lib so I did:
$ export LIBRARY_PATH=/opt/lib/
and then ran make for successful compilation and linking.
To run the program with a shared library define:
$ export LD_LIBRARY_PATH=/opt/lib/
before ...
How to trigger a file download when clicking an HTML button or JavaScript
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Best and most clean solution. But you do not need any extra Javascript here. HTML part with the onclick is enough.
– Florian Leitgeb
Jan 23 '15 at 13:06
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