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Shell command to sum integers, one per line?
... for a: count all documents’ pages script: ls $@ | xargs -i pdftk {} dump_data | grep NumberOfPages | awk '{s+=$2} END {print s}'
– flying sheep
Jul 10 '13 at 14:42
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Uninstall / remove a Homebrew package including all its dependencies
...package names what you don't want to keep installed.
brew leaves > brew_packages
Then you can remove all installed, but unwanted packages and any unnecessary dependencies by running the following command
brew_clean brew_packages
brew_clean is available here: https://gist.github.com/cskeeter...
CSV file written with Python has blank lines between each row
...his code reads thefile.csv , makes changes, and writes results to thefile_subset1 .
9 Answers
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Python: Find in list
...n or generator expressions for that:
matches = [x for x in lst if fulfills_some_condition(x)]
matches = (x for x in lst if x > 6)
The latter will return a generator which you can imagine as a sort of lazy list that will only be built as soon as you iterate through it. By the way, the first one...
Difference between Java Enumeration and Iterator
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@Paul_Draper: Edits should not be adding new meaning to the post, that is what comments are for.
– Emil
Nov 11 '12 at 17:40
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typeof !== “undefined” vs. != null
...gument, or as a global variable), I think the best way to do it is:
if (my_variable === undefined)
jQuery does it, so it's good enough for me :-)
Otherwise, you'll have to use typeof to avoid a ReferenceError.
If you expect undefined to be redefined, you could wrap your code like this:
(functi...
From io.Reader to string in Go
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data, _ := ioutil.ReadAll(response.Body)
fmt.Println(string(data))
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Disabling Minimize & Maximize On WinForm?
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If you want to ever actually close the form, make a class-wide boolean _close and, in your handler, set e.Cancel to !_close, so that whenever the user clicks the X on the window, it doesn't close, but you can still close it (without just killing it) with close = true; this.Close();
(And just to...
How to print a string in fixed width?
...specific case a possible implementation could look like:
>>> dict_ = {'a': 1, 'ab': 1, 'abc': 1}
>>> for item in dict_.items():
... print 'value %3s - num of occurances = %d' % item # %d is the token of integers
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value a - num of occurances = 1
value ab - num of occuran...
SVN command to delete all locally missing files
...bbling in PowerShell, this one-liner will do the trick:
svn status | ? { $_ -match '^!\s+(.*)' } | % { svn rm $Matches[1] }
That is, filter the output to only those lines showing missing files (denoted by an exclamation at the start of the line), capture the associated file name, and perform an s...