大约有 43,100 项符合查询结果(耗时:0.0585秒) [XML]
Does Python have a ternary conditional operator?
...ession:
>>> pass if False else x = 3
File "<stdin>", line 1
pass if False else x = 3
^
SyntaxError: invalid syntax
You can, however, use conditional expressions to assign a variable like so:
x = a if True else b
Think of the conditional expression as switching betwee...
CASCADE DELETE just once
...
178
No. To do it just once you would simply write the delete statement for the table you want to ...
IE7 does not understand display: inline-block
...
301
The IE7 display: inline-block; hack is as follows:
display: inline-block;
*display: inline;
zoo...
python's re: return True if string contains regex pattern
...
155
import re
word = 'fubar'
regexp = re.compile(r'ba[rzd]')
if regexp.search(word):
print 'matc...
Detect if a NumPy array contains at least one non-numeric value?
...
187
This should be faster than iterating and will work regardless of shape.
numpy.isnan(myarray)....
Is gcc std::unordered_map implementation slow? If so - why?
...!!
With gcc-4.7
inserts: 37728
get : 2985
With gcc-4.6
inserts: 2531
get : 1565
So std::unordered_map in gcc-4.7 is broken (or my installation, which is an installation of gcc-4.7.0 on Ubuntu - and another installation which is gcc 4.7.1 on debian testing).
I will submit a bug report.....
Why does ReSharper tell me “implicitly captured closure”?
...ase.OnLoad(e);
int i = 0;
Random g = new Random();
this.button1.Click += (sender, args) => this.label1.Text = i++.ToString();
this.button2.Click += (sender, args) => this.label1.Text = (g.Next() + i).ToString();
}
I get an "Implicitly captured closure: g" warning at the firs...
is there a require for json in node.js
...
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edited Jan 29 '18 at 11:57
Frank Nocke
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