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How Do I Choose Between a Hash Table and a Trie (Prefix Tree)?
So if I have to choose between a hash table or a prefix tree what are the discriminating factors that would lead me to choose one over the other. From my own naive point of view it seems as though using a trie has some extra overhead since it isn't stored as an array but that in terms of run time (a...
Is it a good practice to use an empty URL for a HTML form's action attribute? (action=“”)
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The best thing you can do is leave out the action attribute altogether. If you leave it out, the form will be submitted to the document's address, i.e. the same page.
It is also possible to leave it empty, and any browser implementing HTML's form subm...
What are copy elision and return value optimization?
What is copy elision? What is (named) return value optimization? What do they imply?
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What is the size of an enum in C?
... I need each enum value to be 64 bits wide. If I recall correctly, an enum is generally the same size as an int; but I thought I read somewhere that (at least in GCC) the compiler can make the enum any width they need to be to hold their values. So, is it possible to have an enum that is 64 bits wid...
How does this JavaScript/jQuery syntax work: (function( window, undefined ) { })(window)?
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The undefined is a normal variable and can be changed simply with undefined = "new value";. So jQuery creates a local "undefined" variable that is REALLY undefined.
The window variable is made local for performance reasons. Because when J...
Relationship between hashCode and equals method in Java [duplicate]
...ride equals method in Java, should override hashCode method too, otherwise it is "violating the contract".
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How does lock work exactly?
...sing objects which are not thread safe we wrap the code with a lock like this:
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Do you use NULL or 0 (zero) for pointers in C++?
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Here's Stroustrup's take on this: C++ Style and Technique FAQ
In C++, the definition of NULL is 0, so there is only an aesthetic difference. I prefer to avoid macros, so I use 0. Another problem with NULL is that people sometimes mistakenly believe that ...
How to use git bisect?
I have read some articles saying that git bisect is awesome. However, I'm not a native speaker and I can't understand why it's awesome.
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How can I detect if a browser is blocking a popup?
...(for user input, or something important), but the popup blocker prevents this from happening.
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