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How do you use the ellipsis slicing syntax in Python?
...%r items" % item
...
>>> x = TestEllipsis()
>>> print x[2]
return 2 items
>>> print x[...]
Returning all items
Of course, there is the python documentation, and language reference. But those aren't very helpful.
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Why are arrays covariant but generics are invariant?
...o implement functions of type
boolean equalArrays (Object[] a1, Object[] a2);
void shuffleArray(Object[] a);
However, if array types were treated as invariant, it would only be possible to call these functions on an array of exactly the type Object[]. One could not, for example, shuffle an ar...
How to check if a particular service is running on Ubuntu
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edited Dec 26 '16 at 22:35
Lando
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answered Sep 10 '1...
How do I do an OR filter in a Django query?
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edited Mar 2 at 17:15
phoenix
3,20611 gold badge2727 silver badges3131 bronze badges
answ...
After Installing Java JDK 7 For Mac OS X - mvn -version still shows java version 1.6.0_31
Oracle released Java JDK 7 on April 26 for Mac OS X. I followed the install instructions and when I do java -version in a terminal window I get:
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“android.view.WindowManager$BadTokenException: Unable to add window” on buider.show()
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268
android.view.WindowManager$BadTokenException: Unable to add window"
Problem :
This excep...
Which timestamp type should I choose in a PostgreSQL database?
...CT NOW();
now
-------------------------------
2011-05-27 15:47:58.138995-07
(1 row)
test=> SELECT NOW() AT TIME ZONE 'UTC';
timezone
----------------------------
2011-05-27 22:48:02.235541
(1 row)
Note that AT TIME ZONE 'UTC' strips time zone i...
Preferred way to create a Scala list
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answered Aug 6 '09 at 20:56
Daniel C. SobralDaniel C. Sobral
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SQL Server indexes - ascending or descending, what difference does it make?
...index on a column or number of columns in MS SQL Server (I'm using version 2005), you can specify that the index on each column be either ascending or descending. I'm having a hard time understanding why this choice is even here. Using binary sort techniques, wouldn't a lookup be just as fast either...
Ways to save Backbone.js model data?
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272
Basically Models have a property called attributes which are the various values a certain mode...