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How to play with Control.Monad.Writer in haskell?
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The package Control.Monad.Writer does not export the data constructor Writer. I guess this was different when LYAH was written.
Using the MonadWriter typeclass in ghci
Instead, you create writers using the writer function. For example, in a ghci session I can do
gh...
Pass a PHP string to a JavaScript variable (and escape newlines) [duplicate]
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Expanding on someone else's answer:
<script>
var myvar = <?php echo json_encode($myVarValue); ?>;
</script>
Using json_encode() requires:
PHP 5.2.0 or greater
$myVarValue encoded as UTF-8 (or US-ASCII,...
How to install MySQLdb (Python data access library to MySQL) on Mac OS X?
...qlclient to install the libraries required to use MySQLdb as it currently exists. The following SO question was a helpful clue: Python 3 ImportError: No module named 'ConfigParser' . Installing mysqlclient will install mysqlclient, mysql-connector, and llvmdev (at least, it installed these 3 librari...
Convert a character digit to the corresponding integer in C
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As per other replies, this is fine:
char c = '5';
int x = c - '0';
Also, for error checking, you may wish to check isdigit(c) is true first. Note that you cannot completely portably do the same for letters, for example:
char c = 'b';
int x = c - 'a'; // x is now not necessari...
Split comma-separated strings in a column into separate rows
...lez Inarritu,Benicio Del Toro", "Alejandro González Iñárritu",
"Alex Proyas", "Alexander Hall", "Alfonso Cuaron", "Alfred Hitchcock",
"Anatole Litvak", "Andrew Adamson,Marilyn Fox", "Andrew Dominik",
"Andrew Stanton", "Andrew Stanton,Lee Unkrich", "Angelina Jolie,John Stevenson",
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Generate random numbers with a given (numerical) distribution
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it does exactly the same w.r.t. to the original question. E.g.: numpy.random.choice(numpy.arange(1, 7), p=[0.1, 0.05, 0.05, 0.2, 0.4, 0.2])
– Eugene Pakhomov
Jun 20 '16 at 12:17
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How to create index in Entity Framework 6.2 with code first
Is there a way to create an index on a property/column using code-first, instead of using the new IndexAttribute ?
10 Ans...
What's the yield keyword in JavaScript?
... in JavaScript, but I found very poor documentation about it. Can someone explain me (or recommend a site that explains) its usage and what it is used for?
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Wrap long lines in Python [duplicate]
...atenated at compile time, just as in C. http://docs.python.org/reference/lexical_analysis.html#string-literal-concatenation is a good place to start for more info.
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How to tell Jackson to ignore a field during serialization if its value is null?
...t the attribute would be shown if the value is not null.
A more complete example is available in my answer to How to prevent null values inside a Map and null fields inside a bean from getting serialized through Jackson.
sh...