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JavaScript OR (||) variable assignment explanation
... variable is falsy.
The boolean operators in JavaScript can return an operand, and not always a boolean result as in other languages.
The Logical OR operator (||) returns the value of its second operand, if the first one is falsy, otherwise the value of the first operand is returned.
For example:...
What is self-documenting code and can it replace well documented code? [closed]
...mments (Doxygen, JavaDoc, XML comments etc.) for every class, member, type and method AND
clearly comments any parts of the code that are not self-documenting AND
writes a comment for each block of code that explains the intent, or what the code does on a higher abstraction level (i.e. find all file...
What are -moz- and -webkit-? [duplicate]
I am a beginner at CSS and when I was looking at some CSS code the other day, I found these lines. In the tutorials I used to learn CSS, I have never seen anything like these lines. Could someone please explain these lines to me or give me a source where I could learn to implement lines like these?
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What's the difference between “Layers” and “Tiers”?
What's the difference between "Layers" and "Tiers"?
13 Answers
13
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What is the JSF resource library for and how should it be used?
The JSF <h:outputStylesheet> , <h:outputScript> and <h:graphicImage> components have a library attribute. What is this and how should this be used? There are a lot of examples on the web which use it as follows with the common content/file type css , js and img (or ima...
Search and replace a line in a file in Python
I want to loop over the contents of a text file and do a search and replace on some lines and write the result back to the file. I could first load the whole file in memory and then write it back, but that probably is not the best way to do it.
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Is it possible to install iOS 6 SDK on Xcode 5?
...awhile since we updated; but they still accepted it after iOS 6 came out), and I currently build 10.5 apps with Xcode 5.
See How to point Xcode to an old SDK so it can be used as a "Base SDK"? for details on how to set it up. You can use my fix-xcode
script to link everything for you every time yo...
How to detect if a script is being sourced
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This seems to be portable between Bash and Korn:
[[ $_ != $0 ]] && echo "Script is being sourced" || echo "Script is a subshell"
A line similar to this or an assignment like pathname="$_" (with a later test and action) must be on the first line of the s...
Why is typeof null “object”?
I'm reading 'Professional Javascript for Web Developers' Chapter 4 and it tells me that the five types of primitives are: undefined, null, boolean, number and string.
...
Image fingerprint to compare similarity of many images
...produce a normative mapping of the image data - store this with each image and then compare just the fingerprints. This is a complex algorithm and not for the faint of heart.
a few simple solutions are possible:
Create a luminosity histogram for the image as a fingerprint
Create scaled down versi...