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How to force LINQ Sum() to return 0 while source collection is empty
...ty(0)
.Sum();
This way, your query will only select the Amount field. If the collection is empty, it will return one element with the value of 0 and then the sum will be applied.
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How do I find out which settings.xml file maven is using
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Use the Maven debug option, ie mvn -X :
Apache Maven 3.0.3 (r1075438; 2011-02-28 18:31:09+0100)
Maven home: /usr/java/apache-maven-3.0.3
Java version: 1.6.0_12, vendor: Sun Microsystems Inc.
Java home: /usr/java/jdk1.6.0_12/jre
Default locale: en_US, p...
How to jump to a particular line in a huge text file?
...s are read from a single file. This is used by the traceback module to retrieve source lines for inclusion in the formatted traceback...
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Capture HTML Canvas as gif/jpg/png/pdf?
... answered May 29 '09 at 2:48
olliejolliej
31.8k88 gold badges5555 silver badges5454 bronze badges
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How to force 'cp' to overwrite directory instead of creating another one inside?
...est
test
|-- bar
| |-- a
| `-- b
`-- foo
|-- a
`-- b
2 directories, 4 files
You can see the clear difference when you use -v for Verbose.
When you use just -R option.
$ cp -Rv foo/ bar/
`foo/' -> `bar/foo'
`foo/b' -> `bar/foo/b'
`foo/a' -> `bar/foo/a'
$ tree
|-- bar
| |-...
“#include” a text file in a C program as a char[]
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The question was about C but in case someone tries to do it with C++11 then it can be done with only little changes to the included text file thanks to the new raw string literals:
In C++ do this:
const char *s =
#include "test.txt"
;
In the text file do this:
R"(Lin...
What is the right way to check for a null string in Objective-C?
... the fact that even if title is nil, title.length will return 0/nil/false, ie 0 in this case, so you do not have to special case it. This is something that people who are new to Objective C have trouble getting used to, especially coming form other languages where messages/method calls to nil crash...
Most common C# bitwise operations on enums
... of me, I can't remember how to set, delete, toggle or test a bit in a bitfield. Either I'm unsure or I mix them up because I rarely need these. So a "bit-cheat-sheet" would be nice to have.
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How to position one element relative to another with jQuery?
... answered May 6 '10 at 13:37
UrielUriel
2,05611 gold badge1313 silver badges22 bronze badges
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What are the benefits of functional programming? [closed]
...ional programming is to describe what you want, rather than how to get it. ie: instead of creating a for-loop with an iterator variable and marching through an array doing something to each cell, you'd say the equivalent of "this label refers to a version of this array where this function has been d...