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How to sort Map values by key in Java?
...ert an element will go from O(1) to O(Log(N)).
In a HashMap, moving from 1000 items to 10,000 doesn't really affect your time to lookup an element, but for a TreeMap the lookup time will be about 3 times slower (assuming Log2). Moving from 1000 to 100,000 will be about 6 times slower for every ele...
Bash history without line numbers
...k! Can you explain what it's doing? Will it work if the numbers are 1 - 10,000?
– cwd
Aug 18 '11 at 15:47
29
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Split a string by spaces — preserving quoted substrings — in Python
...
I use shlex.split to process 70,000,000 lines of squid log, it's so slow. So I switched to re.
Please try this, if you have performance problem with shlex.
import re
def line_split(line):
return re.findall(r'[^"\s]\S*|".+?"', line)
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In Python, how do I split a string and keep the separators?
...split, hacky but worked for my case: re.split('% ', re.sub('% ', '%% ', '5.000% Additional Whatnot')) --> ['5.000%', 'Additional Whatnot']
– Kyle James Walker
Oct 11 '15 at 22:41
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Hidden Features of SQL Server
... Great for small result sets. I wouldn't use it on a table with more than 10000 rows unless you've got time to spare
– John Sheehan
Sep 23 '08 at 15:18
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How to export and import a .sql file from command line with options? [duplicate]
... all privileges on *.* to root@"%" identified by "Passwd";
ERROR 2006 (HY000) at line 866: MySQL server has gone away
mysqldump: Got errno 32 on write
# set this values big enough on destination mysql server, like: max_allowed_packet=1024*1024*20
# use compress parameter '-C'
# use trickle to lim...
MySQL: ignore errors when importing?
I am importing a fairly large database. The .sql file has almost 1,000,000 lines in it. Problem is that I am getting a syntax error when trying to import the database. It says:
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Maximum number of characters using keystrokes A, Ctrl+A, Ctrl+C and Ctrl+V
... a Python implementation. It takes about 0.5 seconds to calculate for N=50,000.
def max_chars(n):
dp = [0] * (n+1)
for i in xrange(n):
dp[i+1] = max(dp[i+1], dp[i]+1) # press a
for j in xrange(i+3, min(i+7, n+1)):
dp[j] = max(dp[j], dp[i]*(j-i-1)) # press select all, copy, paste x...
Create a date from day month and year with T-SQL
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Bad one. Compose me from ints the date of 1st Jan 0001
– Oleg Dok
Mar 4 '13 at 12:56
24
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a href link for entire div in HTML/CSS
... width: 200px;
}
a {
display:block;
background-color: #ccc;
color: #000;
text-decoration:none;
padding:10px;
margin-bottom:1px;
}
a:hover {
background-color: #ddd;
}
http://jsbin.com/zijijuduqo/1/edit?html,css,output
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