大约有 44,300 项符合查询结果（耗时：0.0427秒） [XML]
How to export a Vagrant virtual machine to transfer it
...
121
You have two ways to do this, I'll call it dirty way and clean way:
1. The dirty way
Create a...
How to get default gateway in Mac OSX
... similar to:
route to: 98.137.149.56
destination: default
mask: 128.0.0.0
gateway: 5.5.0.1
interface: tun0
flags: <UP,GATEWAY,DONE,STATIC,PRCLONING>
recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire
0 0 0 0 ...
Python list iterator behavior and next(iterator)
...nge(10)))
>>> for i in a:
... print(i)
... next(a)
...
0
1
2
3
4
5
6
7
8
9
So 0 is the output of print(i), 1 the return value from next(), echoed by the interactive interpreter, etc. There are just 5 iterations, each iteration resulting in 2 lines being written to the terminal.
If...
How to sort an array in descending order in Ruby
...0.times {
ary << {:bar => rand(1000)}
}
n = 500
Benchmark.bm(20) do |x|
x.report("sort") { n.times { ary.sort{ |a,b| b[:bar] <=> a[:bar] } } }
x.report("sort reverse") { n.times { ary.sort{ |a,b| a[:bar] <=> b[:bar] }.reverse } }
x.report("sort_by ...
C++11 range based loop: get item by value or reference to const
Reading some examples of range based loops they suggest two main ways 1, 2, 3, 4
4 Answers
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Counting the Number of keywords in a dictionary in python
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429
len(yourdict.keys())
or just
len(yourdict)
If you like to count unique words in the file, ...
Measure and Benchmark Time for Ruby Methods
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112
You could use the Time object. (Time Docs)
For example,
start = Time.now
# code to time
finish...
python plot normal distribution
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216
import matplotlib.pyplot as plt
import numpy as np
import scipy.stats as stats
import math
mu...
How to bind a List to a ComboBox?
...
As you are referring to a combobox, I'm assuming you don't want to use 2-way databinding (if so, look at using a BindingList)
public class Country
{
public string Name { get; set; }
public IList<City> Cities { get; set; }
public Country(string _name)
{
Cities = new...