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Difference between subprocess.Popen and os.system
...ystem() with subprocess.Popen():
sts = os.system("mycmd" + " myarg")
...does the same thing as...
sts = Popen("mycmd" + " myarg", shell=True).wait()
The "improved" code looks more complicated, but it's better because once you know subprocess.Popen(), you don't need anything else. subprocess.Po...
Telling gcc directly to link a library statically
... before searching for one called libnamespec.a. .. Note that this behavior does not apply to :filename, which always specifies a file called filename.". Since binutils 2.18 - sourceware.org/binutils/docs-2.18/ld/Options.html
– osgx
May 24 '17 at 16:57
...
Is there a “not in” operator in JavaScript for checking object properties?
...s there any sort of "not in" operator in JavaScript to check if a property does not exist in an object? I couldn’t find anything about this around Google or Stack Overflow. Here’s a small snippet of code I’m working on where I need this kind of functionality:
...
How can we match a^n b^n with Java regex?
...i.e. \1?. This may or may not work perfectly, but let's just see what that does, and if there's any problem then we'll cross that bridge when we come to it. Also, we'll add some more test cases while we're at it.
$tests = array(
'aaa', 'aaab', 'aaaxb', 'xaaab', 'b', 'abbb', 'aabb', 'aaabbbbb', 'aa...
Map Tiling Algorithm
...nd "light grass" can transition into "medium grass." Tiled (mapeditor.org) does a great job of handling this by implementing some type of tree search for the terrain brush; I've yet to be able to reproduce it, though.
– Clay
Jun 4 '13 at 15:12
...
How should the ViewModel close the form?
... another UI such as a WinForm, and DialogCloser is specific to WPF. So how does this fit in well as a solution? Also, why write 2x-10x code just to close a Window via a Binding?
– David Anderson
May 5 '12 at 22:18
...
How to evaluate a math expression given in string form?
...en this eval method for arithmetic expressions to answer this question. It does addition, subtraction, multiplication, division, exponentiation (using the ^ symbol), and a few basic functions like sqrt. It supports grouping using (...), and it gets the operator precedence and associativity rules cor...
PostgreSQL disable more output
...
That stops it from using a pager but it doesn't stop the output, no? I'm guessing you'd need PAGER="/dev/null" psql db -P pager=always -f sql.sql to make it always kill output.
– Harald Brinkhof
Jun 25 '12 at 17:47
...
How do I create an Excel (.XLS and .XLSX) file in C# without installing Microsoft Office?
...what about using Open XML SDK 2.0 for Microsoft Office?
A few benefits:
Doesn't require Office installed
Made by Microsoft = decent MSDN documentation
Just one .Net dll to use in project
SDK comes with many tools like diff, validator, etc
Links:
Github
Main MSDN Landing
"How Do I..." starter ...
Correct use of flush() in JPA/Hibernate
...ll em.persist(), Hibernate remembers it has to make a database INSERT, but does not actually execute the instruction until you commit the transaction. Afaik, this is mainly done for performance reasons.
In some cases anyway you want the SQL instructions to be executed immediately; generally when yo...