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How can I quickly sum all numbers in a file?

... For a Perl one-liner, it's basically the same thing as the awk solution in Ayman Hourieh's answer: % perl -nle '$sum += $_ } END { print $sum' If you're curious what Perl one-liners do, you can deparse them: % perl -MO=Deparse -nle '$sum += $_ } END ...
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How do I look inside a Python object?

...-in functions: type() dir() id() getattr() hasattr() globals() locals() callable() type() and dir() are particularly useful for inspecting the type of an object and its set of attributes, respectively. share | ...
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MySql server startup error 'The server quit without updating PID file '

... Did you follow the instructions from brew install mysql? Set up databases to run AS YOUR USER ACCOUNT with: For mysql 5.x: unset TMPDIR mysql_install_db --verbose --user=`whoami` --basedir="$(brew --prefix mysql)" --datadir=/usr/local/var/mysql --tmpdir=/tmp To set...
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Python circular importing?

... of it) for the first time, the code inside the module is executed sequentially like any other code; e.g., it is not treated any differently that the body of a function. An import is just a command like any other (assignment, a function call, def, class). Assuming your imports occur at the top of th...
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Can you nest html forms?

... I agree with the answer, but to ask another, why not? Why does HTML not allow for nesting forms? To me, it appears to be a limitation that we would be better off without. There are many examples where using nested forms would be easier to program (i.e. using an upload photo form with a profile ed...
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Using TortoiseSVN how do I merge changes from the trunk to a branch and vice versa?

...rge Type: Merge a range of revisions | Click 'Next' Merge revision range: Select the URL of the trunk directory that you copied to the branch / tag. Enter the revisions to merge or leave the field empty to merge all revisions | click 'Next' Merge options: I just left these as default | click 'Merg...
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Add params to given URL in Python

... @florian : At least in python 2.7 you then need to call urlencode as urllib.urlencode(query, doseq=True). Otherwise, parameters that existed in the original url are not preserved correctly (because they are returned as tuples from @parse_qs@ – rluba ...
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How to lock orientation during runtime

Is there a way to lock orientation during runtime? For example I'd like to allow the user to lock the screen to landscape if the user currently in landscape and toggle the menu option. ...
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Why isn't ProjectName-Prefix.pch created automatically in Xcode 6?

Why isn't ProjectName-Prefix.pch created automatically in Xcode 6 ? 8 Answers 8 ...
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How do I put the image on the right side of the text in a UIButton?

...ia Interface Builder) There's an easier way from the Interface Builder. Select the UIButton and select this option in the View Utilities > Semantic: That's it! Nice and simple! OPTIONAL - 2nd step: If you want to adjust the spacing between the image and the title you can change the I...