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What are enums and why are they useful?
Today I was browsing through some questions on this site and I found a mention of an enum being used in singleton pattern about purported thread safety benefits to such solution.
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Real World Example of the Strategy Pattern
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edited Jan 11 '10 at 15:56
answered Dec 16 '08 at 1:40
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FB OpenGraph og:image not pulling images (possibly https?)
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I ran into the same problem and reported it as a bug on the Facebook developer site. It seems pretty clear that og:image URIs using HTTP work just fine and URIs using HTTPS do not. They have now acknowledged that they are "looking into this."
Update: As of 2020, th...
How to identify if a webpage is being loaded inside an iframe or directly into the browser window?
I am writing an iframe 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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What are the lesser known but useful data structures?
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Tries, also known as prefix-trees or crit-bit trees, have existed for over 40 years but are still relatively unknown. A very cool use of tries is described in "TRASH - A dynamic LC-trie and hash data structure", which combines a trie with a hash function.
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Styling HTML email for Gmail
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edited Nov 3 '16 at 15:36
mikemaccana
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git pull fails “unable to resolve reference” “unable to update local ref”
Using git 1.6.4.2, when I tried a git pull I get this error:
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CSS Background Opacity [duplicate]
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Children inherit opacity. It'd be weird and inconvenient if they didn't.
You can use a translucent PNG file for your background image, or use an RGBa (a for alpha) color for your background color.
Example, 50% faded black background:
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How to Flatten a Multidimensional Array?
Is it possible, in PHP, to flatten a (bi/multi)dimensional array without using recursion or references?
29 Answers
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Using arrays or std::vectors in C++, what's the performance gap?
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Using C++ arrays with new (that is, using dynamic arrays) should be avoided. There is the problem you have to keep track of the size, and you need to delete them manually and do all sort of housekeeping.
Using arrays on the stack is also dis...