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Reduce, fold or scan (Left/Right)?
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If I'm not mistaken, the left version can use tail call optimization, which means it is much more efficient.
– Trylks
Aug 11 '14 at 11:27
3
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Difference between subprocess.Popen and os.system
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@JacobMarble so suppose I am calling a selenium scraping script from another python script, which of these would allow me to complete the scraping script and then and only then execute the next line of code? As in, my scraping should complete before the ...
Use NUnit Assert.Throws method or ExpectedException attribute?
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The first allows you to test for more than one exception, with multiple calls:
Assert.Throws(()=>MethodThatThrows());
Assert.Throws(()=>Method2ThatThrows());
The second only allows you to test for one exception per test function.
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Use of “this” keyword in formal parameters for static methods in C#
...ible the really powerful LINQ query framework... .
it means that you can call
MyClass myClass = new MyClass();
int i = myClass.Foo();
rather than
MyClass myClass = new MyClass();
int i = Foo(myClass);
This allows the construction of fluent interfaces as stated below.
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T-SQL: Opposite to string concatenation - how to split string into multiple records [duplicate]
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How can I call this function from a select query? I get the following error: Cannot find either column "dbo" or the user-defined function or aggregate "dbo.fn_Split", or the name is ambiguous.
– Lajos Arpad
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When should I use ugettext_lazy?
...fferent languages since django was started!
In views and similar function calls you can use ugettext without problems, because everytime the view is called ugettext will be newly executed, so you will always get the right translation fitting the request!
Regarding ugettext_noop()
As Bryce pointed...
Collisions when generating UUIDs in JavaScript?
...m(). For some browsers the entropy is as low as just 41 bits all together. Calling Math.random() multiple times won't raise the entropy. If you really want unique v4 UUIDs you need to use a cryptographically strong RNG that produces at least 122bit entropy per UUID generated.
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What's the best way to develop a sideswipe menu like the one in Facebook's new iOS app?
...s suffered from trying to implement too much. We decided to write our own called MMDrawerController. Light-weight, and focused: github.com/mutualmobile/MMDrawerController
– kcharwood
May 16 '13 at 1:50
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PermGen elimination in JDK 8
...) space has completely been removed and is kind of replaced by a new space called Metaspace.
The consequences of the PermGen removal is that obviously the PermSize and MaxPermSize JVM arguments are ignored and you will never get a java.lang.OutOfMemoryError: PermGen error.
Advantages of MetaSpace
T...
Difference between freeze and seal
...ally by mis-typing. Many of my students have tried to add an event handler called onClick or onlick and wondered why it’s not working. If JavaScript throws an error, then that’s one less thing to get wrong. Secondly, this allows you to implement constant properties on an object which prevents ch...