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Check if a given key already exists in a dictionary and increment it
...You are looking for collections.defaultdict (available for Python 2.5+). This
from collections import defaultdict
my_dict = defaultdict(int)
my_dict[key] += 1
will do what you want.
For regular Python dicts, if there is no value for a given key, you will not get None when accessing the dict -- ...
How to append to a file in Node?
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edited Jan 11 '18 at 12:25
Dan Dascalescu
98.2k363...
How to print last two columns using awk
All I want is the last two columns printed.
6 Answers
6
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Get file version in PowerShell
...Info]::GetVersionInfo("somefilepath").FileVersion
Or as noted here on a list of files:
get-childitem * -include *.dll,*.exe | foreach-object { "{0}`t{1}" -f $_.Name, [System.Diagnostics.FileVersionInfo]::GetVersionInfo($_).FileVersion }
Or even nicer as a script: https://jtruher3.wordpress.com/...
How to get the directory of the currently running file?
In nodejs I use __dirname . What is the equivalent of this in Golang?
10 Answers
10
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Javascript when to use prototypes
I'd like to understand when it is appropriate to use prototype methods in js. Should they always be used? Or are there cases where using them is not preferred and/or incurs a performance penalty?
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How do I create a multiline Python string with inline variables?
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The common way is the format() function:
>>> s = "This is an {example} with {vars}".format(vars="variables", example="example")
>>> s
'This is an example with variables'
It works fine with a multi-line format string:
&...
Disable autocomplete via CSS
Is it possible to use CSS to disable autocomplete on a form element (specifically a textfield)?
12 Answers
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Eclipse “Invalid Project Description” when creating new project from existing source
I am trying to create a new project from existing source code. I keep getting the following error: "Invalid Project Description", project path "overlaps the location of another project" with the same name. The reason is that I created that project from the source code before, but then I deleted that...
Cron job every three days
Is it possible to run a cronjob every three days? Or maybe 10 times/month.
11 Answers
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