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MySQL Error 1093 - Can't specify target table for update in FROM clause
...eneral error classification. For a more specific answer about how to best handle the OP's exact query, please see other answers to this question
In MySQL, you can't modify the same table which you use in the SELECT part.
This behaviour is documented at:
http://dev.mysql.com/doc/refman/5.6/en/update...
Disable password authentication for SSH [closed]
...ear text passwords
#PasswordAuthentication no
Uncomment the second line, and, if needed, change yes to no.
Then run
service ssh restart
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How to calculate time elapsed in bash script?
I print the start and end time using date +"%T" , which results in something like:
20 Answers
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How to split a large text file into smaller files with equal number of lines?
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Have you looked at the split command?
$ split --help
Usage: split [OPTION] [INPUT [PREFIX]]
Output fixed-size pieces of INPUT to PREFIXaa, PREFIXab, ...; default
size is 1000 lines, and default PREFIX is `x'. With no INPUT, or when INPUT
is -, read standar...
How can I reverse a list in Python?
...cing, such as range(1,4)[::-1], reversed() is easier to read, runs faster, and uses substantially less memory. "
– Jim Oldfield
Aug 20 '16 at 15:55
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Is there a generator version of `string.split()` in Python?
...offset parameter of the str.find() method. This avoids lots of memory use, and relying on the overhead of a regexp when it's not needed.
[edit 2016-8-2: updated this to optionally support regex separators]
def isplit(source, sep=None, regex=False):
"""
generator version of str.split()
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Detach many subdirectories into a new, separate Git repository
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Instead of having to deal with a subshell and using ext glob (as kynan suggested), try this much simpler approach:
git filter-branch --index-filter 'git rm --cached -qr --ignore-unmatch -- . && git reset -q $GIT_COMMIT -- apps/AAA libs/XXX' --prune-empty -- ...
Callback functions in C++
In C++, when and how do you use a callback function?
10 Answers
10
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Deserialize JSON to ArrayList using Jackson
...joDeMixIn , to assist me with the deserialization. MyPojo has only int and String instance variables combined with proper getters and setters. MyPojoDeMixIn looks something like this:
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Rendering a template variable as HTML
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If you don't want the HTML to be escaped, look at the safe filter and the autoescape tag:
safe:
{{ myhtml |safe }}
autoescape:
{% autoescape off %}
{{ myhtml }}
{% endautoescape %}
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