大约有 47,000 项符合查询结果(耗时:0.0892秒) [XML]
twitter bootstrap autocomplete dropdown / combobox with Knockoutjs
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edited Oct 10 '17 at 7:53
Alex Polo
322 bronze badges
answered Oct 16 '12 at 12:31
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Guaranteed lifetime of temporary in C++?
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110
The destructor for that sort of temporaries is called at the end of the full-expression. That's ...
How can I convert a string to a number in Perl?
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90
You don't need to convert it at all:
% perl -e 'print "5.45" + 0.1;'
5.55
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Regular expression for a string that does not start with a sequence
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edited May 22 '09 at 20:05
answered May 22 '09 at 18:57
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Argparse optional positional arguments?
...tion='store_true')
_StoreTrueAction(option_strings=['-v'], dest='v', nargs=0, const=True, default=False, type=None, choices=None, help=None, metavar=None)
>>> parser.add_argument('dir', nargs='?', default=os.getcwd())
_StoreAction(option_strings=[], dest='dir', nargs='?', const=None, defaul...
How do I get the function name inside a function in PHP?
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totymedli
20.9k1818 gold badges102102 silver badges135135 bronze badges
answered Jun 17 '09 at 10:33
Silfverstro...
Difference between json.js and json2.js
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edited Feb 4 '11 at 19:07
Chris
10.7k1313 gold badges4343 silver badges6767 bronze badges
answered Fe...
Putting a simple if-then-else statement on one line [duplicate]
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edited May 23 '17 at 12:10
Community♦
111 silver badge
answered May 10 '10 at 13:00
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How to split/partition a dataset into training and test datasets for, e.g., cross validation?
...k of the indices:
import numpy
# x is your dataset
x = numpy.random.rand(100, 5)
numpy.random.shuffle(x)
training, test = x[:80,:], x[80:,:]
or
import numpy
# x is your dataset
x = numpy.random.rand(100, 5)
indices = numpy.random.permutation(x.shape[0])
training_idx, test_idx = indices[:80], ind...
How does one generate a random number in Apple's Swift language?
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Swift 4.2+
Swift 4.2 shipped with Xcode 10 introduces new easy-to-use random functions for many data types.
You can call the random() method on numeric types.
let randomInt = Int.random(in: 0..<6)
let randomDouble = Double.random(in: 2.71828...3.14159)
let rando...
