大约有 2,000 项符合查询结果（耗时：0.0220秒） [XML]
Why do I get TypeError: can't multiply sequence by non-int of type 'float'?
...ta=1-alpha
C = (-math.log(1-beta))/alpha
coff = [0.0,0.01,0.0,0.35,0.98,0.001,0.0]
coff *= C
The error:
coff *= C
TypeError: can't multiply sequence by non-int of type 'float'
The solution - convert the list to numpy array:
coff = np.asarray(coff) * C
...
SQLite with encryption/password protection
...downloaded for 32-bit development: http://system.data.sqlite.org/blobs/1.0.94.0/sqlite-netFx40-static-binary-Win32-2010-1.0.94.0.zip
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How do I create a variable number of variables?
...
94
Use the built-in getattr function to get an attribute on an object by name. Modify the name as...
How to allow only numeric (0-9) in HTML inputbox using jQuery?
... key == 13 ||
key == 46 ||
key == 110 ||
key == 190 ||
(key >= 35 && key <= 40) ||
(key >= 48 && key <= 57) ||
(key >= 96 && key <= 105));
});
...
How to generate random SHA1 hash to use as ID in node.js?
... us with 10^17 +1 (for possible 0; see notes below) or 100,000,000,000,000,001 uniques.
So how many random inputs can we generate?
Ok, we calculated the number of results for a millisecond timestamp and Math.random
100,000,000,000,000,001 (Math.random)
* 60,000 (times...
Only read selected columns
...), 3)
mpg cyl disp hp drat wt qsec vs am gear carb
1 21 6 160 110 3.9 2.62 16.46 0 1 4 4
2 21 6 160 110 3.9 2.875 17.02 0 1 4 4
3 22.8 4 108 93 3.85 2.32 18.61 1 1 4 1
> head(dbGetQuery(conn, "select mpg, gear from mtcars"), 3)
MPG GEAR
1 21...
Remove non-utf8 characters from string
...s 0xxxxxxx
| [\xC0-\xDF][\x80-\xBF] # double-byte sequences 110xxxxx 10xxxxxx
| [\xE0-\xEF][\x80-\xBF]{2} # triple-byte sequences 1110xxxx 10xxxxxx * 2
| [\xF0-\xF7][\x80-\xBF]{3} # quadruple-byte sequence 11110xxx 10xxxxxx * 3
){1,100} # ...
How to read data when some numbers contain commas as thousand separator?
... Bureau.Name Account.Code X2014 X2015 X2016
1 Senate 110 158,000 211,000 186,000
2 Senate 115 0 0 0
3 Senate 123 15,000 71,000 21,000
4 Senate 126 6,000 14,000 8,000
5 Senate 127 110,000 234,0...
How can I make the computer beep in C#?
... information refer http://msdn.microsoft.com/en-us/library/8hftfeyw%28v=vs.110%29.aspx
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Is there an easy way to create ordinals in C#?
...inal());
Assert.AreEqual("104th", 104.Ordinal());
Assert.AreEqual("110th", 110.Ordinal());
Assert.AreEqual("111th", 111.Ordinal());
Assert.AreEqual("112th", 112.Ordinal());
Assert.AreEqual("113th", 113.Ordinal());
Assert.AreEqual("114th", 114.Ordinal());
Assert.AreEqual("...