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How do I count unique values inside a list
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Is there a printf converter to print in binary format?
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What does “WARN Could not determine content-length of response body.” mean and how to I get rid of i
Since upgrading to Rails 3.1 I'm seeing this warning message in my development log:
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How to check if a string contains a substring in Bash
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You can use Marcus's answer (* wildcards) outside a case statement, too, if you use double brac...
Custom numeric format string to always display the sign
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Yes, you can.
There is conditional formatting. See Conditional formatting in MSDN
eg:
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What do you call the -> operator in Ruby?
... lambda defined using -> is called lambda literal.
succ = ->(x){ x+1 }
succ.call(2)
The code is equivalent to the following one.
succ = lambda { |x| x + 1 }
succ.call(2)
Informally, I have heard it being called stabby lambda or stabby literal.
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Sorting 1 million 8-decimal-digit numbers with 1 MB of RAM
I have a computer with 1 MB of RAM and no other local storage. I must use it to accept 1 million 8-digit decimal numbers over a TCP connection, sort them, and then send the sorted list out over another TCP connection.
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unix - head AND tail of file
Say you have a txt file, what is the command to view the top 10 lines and bottom 10 lines of file simultaneously?
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How to sort a dataframe by multiple column(s)
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