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What is the difference between public, protected, package-private and private in Java?
...o hide the detail of how something is done from your users. Why? Because then you can change them later and not break anybody's code. This lets you optimize, refactor, redesign, and fix bugs without worry that someone was using that code you just overhauled.
So, the rule of thumb is to make thin...
Is floating-point math consistent in C#? Can it be?
...or subtract!
To multiply two fixed point numbers, multiply the two numbers then shift right the defined number of fractional bits.
To divide two fixed point numbers, shift the dividend left the defined number of fractional bits, then divide by the divisor.
Chapter four of this paper has additional g...
Difference between application/x-javascript and text/javascript content types
...omit the Content-Type HTTP header … ever (if you don't specify it in PHP then PHP will default to text/html which is very wrong).
– Quentin
Mar 12 '12 at 9:47
2
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How can HTML5 “replace” Flash? [closed]
... a site logo. Everyone flames Flash but where are the funny web animations then if it was gone? People by now have started rendering their Flash animations into low res videos so you can watch them pixelated... No thanks, I'd rather have the (SMALLER!) Flash file with awesome vector based graphics t...
What is JSONP, and why was it created?
...rver expects a parameter called callback to enable its JSONP capabilities. Then your request would look like:
http://www.example.net/sample.aspx?callback=mycallback
Without JSONP, this might return some basic JavaScript object, like so:
{ foo: 'bar' }
However, with JSONP, when the server recei...
Why is unsigned integer overflow defined behavior but signed integer overflow isn't?
...igned type and the old value can no longer be represented. The behavior is then merely implementation-defined, although a signal may be raised.
C11 6.3.1.3
6.3.1.3 Signed and unsigned integers
When a value with integer
type is converted to another integer type other than _Bool, if the...
What makes Lisp macros so special?
...s in code as an argument, manipulates and the returns the result, which is then run in-place.
Of course that's a lot of typing and programmers are lazy. So we could define DSL for doing list comprehensions. In fact, we're using one macro already (the loop macro).
Lisp defines a couple of s...
LinkedBlockingQueue vs ConcurrentLinkedQueue
...O. You'd have to call poll(), wait a bit if you hadn't found anything, and then poll again etc... leading to delays when a new item comes in, and inefficiencies when it's empty (due to waking up unnecessarily from sleeps).
From the docs for BlockingQueue:
BlockingQueue implementations are desig...
Is a successor for TeX/LaTeX in sight? [closed]
...eX, it is an extended TeX engine (like pdftex, XeTeX) on which both LaTeX (then called LuaLaTeX) and ConTeXt can run. (I think it is the default for today's ConTeXt.)
– Paŭlo Ebermann
Oct 16 '11 at 17:40
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ruby on rails f.select options with custom attributes
...n>
<option value="2:YYY">Argentina</option>
Which you can then parse in your controller:
@id, @currency_code = params[:country_id].split(':')
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