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Value of type 'T' cannot be converted to
... to), and from there to string (since object can be cast to string).
For example:
T newT1 = (T)(object)"some text";
string newT2 = (string)(object)t;
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Resize fields in Django Admin
...awy to this in a form? I did not find a way to set the attrs attribute for all Textareas.
– Julian
Sep 5 '16 at 11:33
1
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Is there XNOR (Logical biconditional) operator in C#?
... booleans. And there are languages where it won't necessarily work. For example, in C, any non-zero scalar value is treated as true, so two "true" values can be unequal. But the question was tagged c#, which has, shall we say, well-behaved booleans.
Note also that this doesn't generalize to bitwi...
Transpose/Unzip Function (inverse of zip)?
...'d', 4)])
[('a', 'b', 'c', 'd'), (1, 2, 3, 4)]
The way this works is by calling zip with the arguments:
zip(('a', 1), ('b', 2), ('c', 3), ('d', 4))
… except the arguments are passed to zip directly (after being converted to a tuple), so there's no need to worry about the number of arguments g...
PostgreSQL: Drop PostgreSQL database through command line [closed]
...ype of activity is currently taking place against your database, including all idle processes.
SELECT * FROM pg_stat_activity WHERE datname='database name';
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Push origin master error on new repository
... not mention the "git commit -m 'first commit'" command. Once I used that, all was fine!
– Pascal Lindelauf
Sep 1 '09 at 13:55
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Python error “ImportError: No module named”
Python is installed in a local directory.
28 Answers
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How to step through Python code to help debug issues?
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Yes! There's a Python debugger called pdb just for doing that!
You can launch a Python program through pdb by using pdb myscript.py or python -m pdb myscript.py.
There are a few commands you can then issue, which are documented on the pdb page.
Some usef...
使用虚拟现实和App Inventor进行实验 · App Inventor 2 中文网
...验
该项目是麻省理工学院 App Inventor 2011 年 Google Summer of Code 活动的一部分。它描述了使用 Google Cardboard SDK 为 App Inventor 添加虚拟功能的实验。有两个演示项目可以作为未来实验的基础。
简介
人们对虚拟现实 (VR) 和增强现实 (A...
Union of dict objects in Python [duplicate]
...yptic, and it immediately makes most readers balk and the remainder assume all the keys in x would have to be legal parameter names. IMHO, the fact it works is a bug in the name-checking mechanisms in the implementation. What happens when you rely on bugs? They either get fixed, or become politic...