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Subtract two variables in Bash
I have the script below to subtract the counts of files between two directories but the COUNT= expression does not work. What is the correct syntax?
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Throwing cats out of windows
Imagine you're in a tall building with a cat. The cat can survive a fall out of a low story window, but will die if thrown from a high floor. How can you figure out the longest drop that the cat can survive, using the least number of attempts?
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Conditional formatting based on another cell's value
I'm using Google Sheets for a daily dashboard. What I need is to change the background color of cell B5 based on the value of another cell - C5. If C5 is greater than 80% then the background color is green but if it's below, it will be amber/red.
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Scale image to fit a bounding box
Is there a css-only solution to scale an image into a bounding box (keeping aspect-ratio)? This works if the image is bigger than the container:
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How to install a gem or update RubyGems if it fails with a permissions error
I'm trying to install a gem using gem install mygem or update RubyGems using gem update --system , and it fails with this error:
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How to split text without spaces into list of words?
Input: "tableapplechairtablecupboard..." many words
16 Answers
16
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How to replace all occurrences of a character in string?
What is the effective way to replace all occurrences of a character with another character in std::string ?
15 Answers
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How do JavaScript closures work?
How would you explain JavaScript closures to someone with a knowledge of the concepts they consist of (for example functions, variables and the like), but does not understand closures themselves?
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How to render a PDF file in Android
Android does not have PDF support in its libraries. Is there any way to render PDF files in the Android applications?
9 Ans...
Safe characters for friendly url [closed]
I need to make a website that will have articles, and I would like to make friendly URLs for it, example the URL of the page with
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