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How to avoid isset() and empty()
...undefined" and "undefined offset" messages when running on the E_NOTICE error level, because the existence of variables is not explicitly checked using isset() and consorts.
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Match everything except for specified strings
I know that the following regex will match "red", "green", or "blue".
7 Answers
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What is HTML5 ARIA?
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WAI-ARIA is a spec defining support for accessible web apps. It defines bunch of markup extensions (mostly as attributes on HTML5 elements), which can be used by the web app developer to provide additional information about the semantics of the various elem...
Can I use an OR in regex without capturing what's enclosed?
...match. So you can only reference the match of ((?:a|b)c) that is either ac or bc.
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How to download Xcode DMG or XIP file?
Where does the Mac App Store download the files to under Lion? I need the DMG file in order to repair something in my system, but how can I access that file?
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Why does ENOENT mean “No such file or directory”?
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It's an abbreviation of Error NO ENTry (or Error NO ENTity), and can actually be used for more than files/directories.
It's abbreviated because C compilers at the dawn of time didn't support more than 8 characters in symbols.
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How to identify if a webpage is being loaded inside an iframe or directly into the browser window?
...me based facebook app. Now I want to use the same html page to render the normal website as well as the canvas page within facebook. I want to know if I can determine whether the page has been loaded inside the iframe or directly in the browser?
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Checking from shell script if a directory contains files
From a shell script, how do I check if a directory contains files?
26 Answers
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What are the undocumented features and limitations of the Windows FINDSTR command?
The Windows FINDSTR command is horribly documented. There is very basic command line help available through FINDSTR /? , or HELP FINDSTR , but it is woefully inadequate. There is a wee bit more documentation online at https://docs.microsoft.com/en-us/windows-server/administration/windows-commands...
Checking if a string is empty or null in Java [duplicate]
I'm parsing HTML data. The String may be null or empty, when the word to parse does not match.
5 Answers
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