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How to randomly pick an element from an array
...ook at this question:
How do I generate random integers within a specific range in Java?
You will want to generate a random number from 0 to your integers length - 1. Then simply get your int from your array:
myArray[myRandomNumber];
...
Trim spaces from end of a NSString
...ngByTrimmingTrailingCharactersInSet:(NSCharacterSet *)characterSet {
NSRange rangeOfLastWantedCharacter = [self rangeOfCharacterFromSet:[characterSet invertedSet]
options:NSBackwardsSearch];
if (rangeOfLastWantedCharacter.locatio...
不同品牌的防火墙组成高可靠性集群 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...-------------------------
set protocol ospf
set enable
set area 0.0.0.0 range 172.16.100.0 255.255.255.0 advertise
set area 0.0.0.0 range 172.16.110.0 255.255.255.0 advertise
exit
set interface redundant1.10 protocol ospf area 0.0.0.0
set interface redundant1.10 protocol ospf enable
set inte...
Read file from line 2 or skip header row
...ns the comma-delimited
strings on each line as a list"""
for _ in range(numberheaderlines):
yield map(str.strip, filehandle.readline().strip().split(','))
with open('coordinates.txt', 'r') as rh:
# Single header line
#print next(__readheader(rh))
# Multiple header line...
How do I lowercase a string in C?
... @hatorade: tolower() leaves argument unchanged if it is not in 'A'..'Z' range.
– jfs
Apr 18 '10 at 18:20
1
...
How do you find the sum of all the numbers in an array in Java?
...nt startInclusive, int endExclusive) which permits you to take a specified range of the array (which can be useful) :
int sum = Arrays.stream(new int []{1,2,3,4}, 0, 2).sum(); //prints 3
Finally, it can take an array of type T. So you can per example have a String which contains numbers as an inp...
python pandas dataframe to dictionary
...his ugly but working code:
>>> mydict = {}
>>> for x in range(len(ptest)):
... currentid = ptest.iloc[x,0]
... currentvalue = ptest.iloc[x,1]
... mydict.setdefault(currentid, [])
... mydict[currentid].append(currentvalue)
>>> mydict
{'a': [1, 2], 'b': [3]}...
month name to month number and vice versa in python
...g this way: month_cal = dict((v,k) for v,k in zip(calendar.month_abbr[1:], range(1, 13))), and then month_cal[shortMonth]
– Matt W.
Jul 12 '18 at 17:29
3
...
Downloading a picture via urllib and python
......, filename_10.jpg then download all of them:
import requests
for x in range(1, 10):
str1 = 'filename_%2.2d.jpg' % (x)
str2 = 'http://site/dir/filename_%2.2d.jpg' % (x)
f = open(str1, 'wb')
f.write(requests.get(str2).content)
f.close()
...
Python date string to date object
...n parsing Feb date like '2902'. I get this error ValueError: day is out of range for month. Not sure how I can set the default year while parsing.
– Shubham Naik
Apr 19 at 13:28
...