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Using Version Control for Home Development?
... been developing my personal and school
projects at home without using any form of revision control
software to handle my changes and whatnot.
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Converting a string to int in Groovy
...teger
If you need to check whether the String can be converted before performing the conversion, use
String number = "66"
if (number.isInteger()) {
int value = number as Integer
}
Deprecation Update
In recent versions of Groovy one of the toInteger() methods has been deprecated. The follo...
How to return PDF to browser in MVC?
...HttpContext.Response.AddHeader("content-disposition","attachment; filename=form.pdf");
// Return the output stream
return File(output, "application/pdf"); //new FileStreamResult(output, "application/pdf");
}
share...
Split data frame string column into multiple columns
I'd like to take data of the form
15 Answers
15
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The object cannot be deleted because it was not found in the ObjectStateManager
...a (which should be the accepted answer).
If like me, you've got code in a format like this:
using (var context = new MyDataContext())
{
context.MyTableEntity.Remove(EntytyToRemove);
var nrOfObjectsChanged = context.SaveChanges();
}
..then this what you want to do:
using (var context = n...
How do you search for files containing DOS line endings (CRLF) with grep on Linux?
...hanks! For clarity of those who come after, bash manual says "Words of the form $'string' are treated specially. The word expands to string, with backslash-escaped characters replaced as specified by the ANSI C standard." (see also this list of supported codes)
– Sean Gugler
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Empty set literal?
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Why?! Performance is almost identical: $ python3.7 -m timeit 'set()' 2000000 loops, best of 5: 177 nsec per loop $ python3.7 -m timeit '{*()}' 2000000 loops, best of 5: 171 nsec per loop
– ogurets
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C++ Returning reference to local variable
...rimitive values because just about every compiler nowadays implements some form of return value optimization:
class big_object
{
public:
big_object(/* constructor arguments */);
~big_object();
big_object(const big_object& rhs);
big_object& operator=(const big_object& r...
Contains method for a slice
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In its current form this code offers no benefit, since there is no point in constructing a map from a slice if you are only going to use it once. — To be useful, this code should rather provide a function sliceToMap that does all the prep...
How do I convert a double into a string in C++?
...any of the conversion routines are implemented inline. According to the performance measurements on the bottom of this page (boost.org/doc/libs/1_47_0/libs/conversion/lexical_cast.htm), boost::lexical_cast is faster than using stringstreams and, in most cases, faster than scanf/printf
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