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Why does Convert.ToString(null) return a different value if you cast null?
...e to any reference type. In this case string is more specific than object and hence it will be picked as the winner.
In the null as object you've solidified the type of the expression as object. This means it's no longer compatible with the string overload and the compiler picks the object over...
C# List of objects, how do I get the sum of a property
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And if you need to do it on items that match a specific condition...
double total = myList.Where(item => item.Name == "Eggs").Sum(item => item.Amount);
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How do I convert a string to a double in Python?
...float(x)
2342.3400000000001
There you go. Use float (which behaves like and has the same precision as a C,C++, or Java double).
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How to select following sibling/xml tag using xpath
I have an HTML file (from Newegg) and their HTML is organized like below. All of the data in their specifications table is ' desc ' while the titles of each section are in ' name. ' Below are two examples of data from Newegg pages.
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Adding Xcode Workspace Schemes to Version Control
...th in the .xcscheme file if the Executable is set to anything but "None". Hand editing the path in XML to a relative path causes a crash in XCode. So even though it's "Shared", it contains user specific data.
– bluebadge
Sep 16 '15 at 3:39
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Spring mvc @PathVariable
Can you give me a brief explanation and a sample in using @PathVariable in spring mvc? Please include on how you type the url?
I'm struggling in getting the right url to show the jsp page. Thanks.
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JavaScript plus sign in front of function expression
I’ve been looking for information about immediately invoked functions, and somewhere I stumbled on this notation:
3 Answe...
Use of 'use utf8;' gives me 'Wide character in print'
...se UTF8, then it will interpret those three bytes as your single character and that is what is displayed.
If we add in the utf8 module, things are different. In this case, Perl interprets your string as just two characters.
$ perl -Mutf8 -E 'say join ":", map { ord } split //, "鸡\n";'
40481:10
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What's the point of g++ -Wreorder?
...hat somebody might see the list of member initialisers in the constructor, and think that they're executed in that order (j first, then i). They are not, they are executed in the order the members are defined in the class.
Suppose you wrote A(): j(0), i(j) {}. Somebody might read that, and think th...
Delete all tags from a Git repository
...sophy where you pipe everything. On Windows use git bash with the same command.
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