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How does the SQL injection from the “Bobby Tables” XKCD comic work?
...ven worse!
school=> SELECT * FROM students;
ERROR: relation "students" does not exist
LINE 1: SELECT * FROM students;
^
This drops (deletes) the student table.
(All code examples in this answer were run on a PostgreSQL 9.1.2 database server.)
To make it clear what's happe...
How does `scp` differ from `rsync`?
...ification has nothing to do with this
option’s before-the-transfer “Does this file need to be updated?”
check.
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Why does Convert.ToString(null) return a different value if you cast null?
...aredPar's excellent overload resolution answer - the question remains "why does Convert.ToString(string) return null, but Convert.ToString(object) return string.Empty"?
And the answer to that is...because the docs say so:
Convert.ToString(string) returns "the specified string instance; no actual co...
How can I have grep not print out 'No such file or directory' errors?
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@Alex @Dogbert This does answer the question, but '-s' can mask problems, e.g. when you use xargs with grep. Try creating 2 files in a dir, 'aaa.txt' and 'a b.txt', both containing the string 'some text'. The command /bin/ls -1 | xargs grep 'som...
How does a ArrayList's contains() method evaluate objects?
...() method evaluate the two objects to be the same? Assume the constructor doesn't do anything funny with the input, and the variables stored in both objects are identical.
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Why does Popen.communicate() return b'hi\n' instead of 'hi'?
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As mentioned before, echo hi actually does return hi\n, which it is an expected behavior.
But you probably want to just get the data in a "right" format and not deal with encoding. All you need to do is pass universal_newlines=True option to subprocess.Popen() l...
Why does @foo.setter in Python not work for me?
So, I'm playing with decorators in Python 2.6, and I'm having some trouble getting them to work. Here is my class file:
4 A...
What is the most elegant way to remove a path from the $PATH variable in Bash?
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An empty string as a "member" of the PATH variable does, as a special rule, denote current directory in all Unix shells since at least V7 Unix of 1979. It still does in bash. Check the manual or try for yourself.
– Fred Foo
Mar 13 '11 at...
Is there a Subversion command to reset the working copy?
...n the repository? Something like git reset --hard or (ha, hard Git reset does not remove unversioned files either!) rm -rf wc && svn co <url> wc .
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How can I specify a branch/tag when adding a Git submodule?
How does git submodule add -b work?
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