大约有 40,000 项符合查询结果（耗时：0.0577秒） [XML]
Remove all values within one list from another list? [duplicate]
...Error:
pass
return a
5 tries, average time 0.27 sec
def set_approach(a,b):
return list(set(a)-set(b))
5 tries, average time 0.0057 sec
Also I made another measurement with bigger inputs size for the last two functions
a = range(1,500000)
b = range(1,100000)
And the resul...
Using capistrano to deploy from different git branches
...g is widely used in development. Capistrano uses deploy.rb file for it's settings, one of them being the branch to deploy from.
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Java List.contains(Object with field value equal to x)
I want to check whether a List contains an object that has a field with a certain value. Now, I could use a loop to go through and check, but I was curious if there was anything more code efficient.
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Convert tabs to spaces in Notepad++
...re you want to enter spaces instead of tab when you press tab key:
Go to Settings->Preferences...->Language (since version 7.1) or Settings->Preferences...->Tab Settings (previous versions)
Check Replace by space
(Optional) You can set the number of spaces to use in place of a Tab by c...
rsync: how can I configure it to create target directory on server?
I would like to rsync from local computer to server. On a directory that does not exist, and I want rsync to create that directory on the server first.
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How to calculate the intersection of two sets? [duplicate]
Say, have two Hashset, how to calculate the intersection of them?
2 Answers
2
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Why there is no ConcurrentHashSet against ConcurrentHashMap
HashSet is based on HashMap.
9 Answers
9
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MySQL and GROUP_CONCAT() maximum length
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SET SESSION group_concat_max_len = 1000000;
is a temporary, session-scope, setting. It only applies to the current session You should use it like this.
SET SESSION group_concat_max_len = 1000000;
select group_concat(colum...
Is there a way to make mv create the directory to be moved to if it doesn't exist?
So, if I'm in my home directory and I want to move foo.c to ~/bar/baz/foo.c , but those directories don't exist, is there some way to have those directories automatically created, so that you would only have to type
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Multiple linear regression in Python
I can't seem to find any python libraries that do multiple regression. The only things I find only do simple regression. I need to regress my dependent variable (y) against several independent variables (x1, x2, x3, etc.).
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