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How to run a hello.js file in Node.js on windows?
...omes with a Node.js command prompt that has the paths properly set already if you don't want to modify your system path.
– joshperry
Oct 21 '13 at 17:00
2
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Java Class.cast() vs. cast operator
...t way in this case would be to do an instance of check first like this: if (cls.isInstance(o)){ return cls.cast(o); } Except if you're sure the type will be correct, of course.
– Puce
Jan 19 '12 at 8:57
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std::string to char*
...ar *; you aren't allowed to change the C-style string returned by c_str(). If you want to process it you'll have to copy it first:
std::string str = "string";
char *cstr = new char[str.length() + 1];
strcpy(cstr, str.c_str());
// do stuff
delete [] cstr;
Or in modern C++:
std::vector<char>...
How to generate a git patch for a specific commit?
...
It does not seem to work if the last commit is a merge from another branch.
– Lex Li
Apr 4 '14 at 3:52
2
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Returning null as an int permitted with ternary operator but not if statement
... rules for the conditional operator (as described in the Java Language Specification, 15.25), and moves happily on. This will generate a NullPointerException at run time, which you can confirm by trying it.
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SQL Server reports 'Invalid column name', but the column is present and the query works through mana
...ct to SQL Server (something like userid.PerfDiag).
When you have an unqualified reference to a schema object (such as a table) — one not qualified by schema name — the object reference must be resolved. Name resolution occurs by searching in the following sequence for an object of the appropria...
str performance in python
... 3 RETURN_VALUE
% with a run-time expression is not (significantly) faster than str:
>>> Timer('str(x)', 'x=100').timeit()
0.25641703605651855
>>> Timer('"%s" % x', 'x=100').timeit()
0.2169809341430664
Do note that str is still slightly slower, as @DietrichEpp ...
How to completely uninstall Visual Studio 2010?
...rom the link:
Warning: Running this command may remove some packages even if they are
still in use like those listed in Optional shared packages.
Download the setup application you used to originally install Visual Studio 2012. If you installed from media, please insert that media.
Open a command ...
disable all form elements inside div
...g jQuery: Because :input is a jQuery extension and not part of the CSS specification, queries using :input cannot take advantage of the performance boost provided by the native DOM querySelectorAll() method. To achieve the best performance when using :input to select elements, first select the eleme...
Matching an empty input box using CSS
How do I apply a style to an empty input box? If the user types something in the input field, the style should no longer be applied. Is this possible in CSS? I tried this:
...