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【解决】App Inventor 2 中文版服务启动超时，问题排查 - App Inventor 2 ...
...动检查，目前有技术细节没解决，后续会继续研究。
2、虽然概率小些，但也遇到过几例。开始菜单， cmd，打开 dos 窗口，输入 netstat，如果报错命令找不到，就意味着系统的环境变量被破坏，导致无法启动软件。
解决方法...
Using Pairs or 2-tuples in Java [duplicate]
...
324
I don't think there is a general purpose tuple class in Java but a custom one might be as easy ...
conditional unique constraint
...Status = 1 and Count > 0.
http://msdn.microsoft.com/en-us/library/ms188258.aspx
CREATE TABLE CheckConstraint
(
Id TINYINT,
Name VARCHAR(50),
RecordStatus TINYINT
)
GO
CREATE FUNCTION CheckActiveCount(
@Id INT
) RETURNS INT AS BEGIN
DECLARE @ret INT;
SELECT @ret = COUNT(*) FROM Che...
Get the first element of each tuple in a list in Python [duplicate]
...[x[0] for x in rows]
Below is a demonstration:
>>> rows = [(1, 2), (3, 4), (5, 6)]
>>> [x[0] for x in rows]
[1, 3, 5]
>>>
Alternately, you could use unpacking instead of x[0]:
res_list = [x for x,_ in rows]
Below is a demonstration:
>>> lst = [(1, 2), (...
How can I link to a specific glibc version?
...thing on my Ubuntu Lucid 10.04 PC it gets linked against glibc. Lucid uses 2.11 of glibc. When I run this binary on another PC with an older glibc, the command fails saying there's no glibc 2.11...
...
Converting milliseconds to a date (jQuery/JavaScript)
...;
var date = new Date(time);
alert(date.toString()); // Wed Jan 12 2011 12:42:46 GMT-0800 (PST)
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Problems installing the devtools package
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edited May 23 '17 at 11:33
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answered Jan 4 '14 at 17:15
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A more useful statusline in vim? [closed]
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edited May 9 '16 at 21:49
go2null
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answered ...
How to extract img src, title and alt from html using php? [duplicate]
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204
EDIT : now that I know better
Using regexp to solve this kind of problem is a bad idea and wi...
Rename a dictionary key
... entirely new one using a comprehension.
>>> OrderedDict(zip('123', 'abc'))
OrderedDict([('1', 'a'), ('2', 'b'), ('3', 'c')])
>>> oldkey, newkey = '2', 'potato'
>>> OrderedDict((newkey if k == oldkey else k, v) for k, v in _.viewitems())
OrderedDict([('1', 'a'), ('potat...