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Ruby equivalent of virtualenv?
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RVM works closer to how virtualenv works since it lets you sandbox different ruby versions and their gems, etc.
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Safe integer parsing in Ruby
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This might work:
i.to_i if i.match(/^\d+$/)
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What does “all” stand for in a makefile?
... executable1 out of file1.o and file3.o
Build executable2 out of file2.o
If you implemented this workflow with makefile, you could make each of the targets separately. For example, if you wrote
make file1.o
it would only build that file, if necessary.
The name of all is not fixed. It's just ...
Python string.replace regular expression [duplicate]
...ons are cached (docs), so compiling isn't even necessary. But as you show, if one compiles, compile outside the loop.
– alttag
Nov 14 '17 at 22:01
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How to check for Is not Null And Is not Empty string in SQL server?
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If you only want to match "" as an empty string
WHERE DATALENGTH(COLUMN) > 0
If you want to count any string consisting entirely of spaces as empty
WHERE COLUMN <> ''
Both of these will not return NULL values...
How do I see a C/C++ source file after preprocessing in Visual Studio?
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cl.exe, the command line interface to Microsoft Visual C++, has three different options for outputting the preprocessed file (hence the inconsistency in the previous responses about Visual C++):
/E: preprocess to stdout (similar to GCC's -E option)
/P: preprocess to file
/EP: preprocess to std...
Inserting HTML elements with JavaScript
...all modern browsers. For IE 5.5 and below you could perform a check like:: if (document.createDocumentFragment) { create('...'); } else { /* Use innerHTML perhaps */ }
– James
May 2 '09 at 14:41
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How can I copy data from one column to another in the same table?
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This will also work if you want to transfer old value to other column and update the first one: UPDATE table SET columnA = 'new value', columnB = columnA. Like other answer says - don't forget the WHERE clause to update only what's needed.
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Script to kill all connections to a database (More than RESTRICTED_USER ROLLBACK)
... I agree with Mark. This method should be the accepted answer as it is significantly more elegant and less impacting for the databases.
– Austin S.
Nov 21 '14 at 1:11
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Passing a function with parameters as a parameter?
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If you're wanting to call a function on an object, you need to call bind(). myObj.click( function() { this.doSomething(); }.bind( myObj ) ); That will make "this" be myObj.
– Eli
Oct 3 '...