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Convert .pem to .crt and .key
...ad certificate 140584440387400:error:0906D06C:PEM routines:PEM_read_bio:no start line:pem_lib.c:703:Expecting: TRUSTED CERTIFICATE
– Damien Carol
May 20 '15 at 13:57
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SQL: deleting tables with prefix
...some
notions from other answers on the web.
I needed to delete all tables starting with 'temp_'
After a few iterations I came up with this block of code:
-- Set up variable to delete ALL tables starting with 'temp_'
SET GROUP_CONCAT_MAX_LEN=10000;
SET @tbls = (SELECT GROUP_CONCAT(TABLE_NAME)
...
Rearrange columns using cut
... such lines to a vector called @F ("F" - like Field). Perl indexes vectors starting from 0 unlike cut which indexes fields starting form 1.
You can add -F pattern (with no space between -F and pattern) to use pattern as a field separator when reading the file instead of the default whitespace
The ...
How to erase the file contents of text file in Python?
...seek(0) after f.truncate(0), else you will have weird \x00 appended at the start of the file.
– krishna chaitanya
May 10 at 8:47
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What is the difference between return and return()?
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return is a keyword that signifies the start of a return statement.
– RobG
Apr 10 '14 at 13:14
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Clojure differences between Ref, Var, Agent, Atom, with examples
...is question, I can reproduce a short snip-it of the motivations for each:
start by watching this video on the notion of Identity and/or studying here.
Refs are for Coordinated Synchronous access to "Many Identities".
Atoms are for Uncoordinated synchronous access to a single Identity.
Agents are ...
How to throw a C++ exception
...ception, when you catch "all possible" exceptions types, you should always start the catch clauses with the "most derived" exception type that may be caught. See the example (of what NOT to do):
#include <iostream>
#include <string>
using namespace std;
class MyException : public exce...
Keep ignored files out of git status
...ile
# git ls-files --others --exclude-from=.git/info/exclude
# Lines that start with '#' are comments.
# For a project mostly in C, the following would be a good set of
# exclude patterns (uncomment them if you want to use them):
# *.[oa]
# *~
Final content of "exclude" file
# git ls-files --oth...
Git-Based Source Control in the Enterprise: Suggested Tools and Practices?
...hought you knew)
No commercial support options available
I don't want to start a git vs. hg flamewar here, you have already done the right step by switching to a DVCS. Mercurial addresses some of the points above and I think it is therefore better suited in an enterprise context:
All plattforms ...
Using multiple delimiters in awk
...erl code
Perl is closely related to awk, however, the @F autosplit array starts at index $F[0] while awk fields start with $1.
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