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R apply function with multiple parameters
I have a function f(var1, var2) in R. Suppose we set var2 = 1 and now I want to apply the function f() to the list L . Basically I want to get a new list L* with the outputs
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Does R have an assert statement as in python?
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stopifnot()
You may also be interested in packages like Runit and testthat for unit testing.
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How can I convert a file pointer ( FILE* fp ) to a file descriptor (int fd)?
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214
The proper function is int fileno(FILE *stream). It can be found in <stdio.h>, and is a P...
When should i use npm with “-g” flag and why?
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-g is the global install flag, as explained in this answer. It's covered in detail in this nod...
Default template arguments for function templates
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It makes sense to give default template arguments. For example you could create a sort functio...
What is the type of lambda when deduced with “auto” in C++11?
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The type of a lambda expression is unspecified.
But they are generally mere syntactic sugar ...
Remove non-numeric characters (except periods and commas) from a string
...c characters and the comma and period/full stop as follows:
$testString = '12.322,11T';
echo preg_replace('/[^0-9,.]+/', '', $testString);
The pattern can also be expressed as /[^\d,.]+/
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Splitting a string into chunks of a certain size
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How to write UPDATE SQL with Table alias in SQL Server 2008?
... as follows:
UPDATE Q
SET Q.TITLE = 'TEST'
FROM HOLD_TABLE Q
WHERE Q.ID = 101;
The alias should not be necessary here though.
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How update the _id of one MongoDB Document?
...2d2a000002")})
// set a new _id on the document
doc._id = ObjectId("4c8a331bda76c559ef000004")
// insert the document, using the new _id
db.clients.insert(doc)
// remove the document with the old _id
db.clients.remove({_id: ObjectId("4cc45467c55f4d2d2a000002")})
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