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how does array[100] = {0} set the entire array to 0?
How does the compiler fill values in char array[100] = {0}; ? What's the magic behind it?
4 Answers
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Converting an integer to a hexadecimal string in Ruby
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You can give to_s a base other than 10:
10.to_s(16) #=> "a"
Note that in ruby 2.4 FixNum and BigNum were unified in the Integer class.
If you are using an older ruby check the documentation of FixNum#to_s and BigNum#to_s
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Centering a background image, using CSS
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310
background-image: url(path-to-file/img.jpg);
background-repeat:no-repeat;
background-position: ...
Is there a numpy builtin to reject outliers from a list
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10 Answers
10
Active
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How to sort a Ruby Hash by number value?
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metrics = {"sitea.com" => 745, "siteb.com" => 9, "sitec.com" => 10 }
metrics.sort_by {|_key, value| value}
# ==> [["siteb.com", 9], ["sitec.com", 10], ["sitea.com", 745]]
If you need a hash as a result, you can use to_h (in Ruby 2.0+)
metrics.sort_by {|_key, value| value}.to_h
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Can I grep only the first n lines of a file?
...e very long log files, is it possible to ask grep to only search the first 10 lines?
12 Answers
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How do I change the formatting of numbers on an axis with ggplot?
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FYI, this also works with scale_y_log10(labels = scales::comma), and I'm assuming other scales in ggplot2. Great tips!
– TheProletariat
Sep 19 '17 at 18:46
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Sleep until a specific time/date
... the following:
current_epoch=$(date +%s)
target_epoch=$(date -d '01/01/2010 12:00' +%s)
sleep_seconds=$(( $target_epoch - $current_epoch ))
sleep $sleep_seconds
To add precision down to nanoseconds (effectively more around milliseconds) use e.g. this syntax:
current_epoch=$(date +%s.%N)
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How to check if a line is blank using regex
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edited Feb 10 '17 at 15:12
Elliot Labs LLC
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answered...
How to create a hex dump of file containing only the hex characters without spaces in bash?
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Giacomo1968
23.3k1010 gold badges5858 silver badges8787 bronze badges
answered Apr 10 '10 at 20:27
mark4omark4o
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