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How do the Proxy, Decorator, Adapter, and Bridge Patterns differ?
...ions.
Facade is a higher-level (read: simpler) interface to a subsystem of one or more classes. Suppose you have a complex concept that requires multiple objects to represent. Making changes to that set of objects is confusing, because you don't always know which object has the method you need to ca...
Update one MySQL table with values from another
I'm trying to update one MySQL table based on information from another.
2 Answers
2
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What is the difference between parseInt(string) and Number(string) in JavaScript? [duplicate]
...kes it useful when you need a numeric value at the front "in case there is one" (note that parseInt("hui") also returns NaN). And the biggest difference is the use of radix that Number() doesn't know of and parseInt() may indirectly guess from the given string (that can cause weird results sometimes...
What are queues in jQuery?
...ns, reading the source and looking at examples helps me out tremendously. One of the best examples of a queue function I've seen is .delay():
$.fn.delay = function( time, type ) {
time = jQuery.fx ? jQuery.fx.speeds[time] || time : time;
type = type || "fx";
return this.queue( type, functio...
LINQ's Distinct() on a particular property
...the question). What I if want to use Distinct on a list of an Object on one or more properties of the object?
20 Answ...
Callback when CSS3 transition finishes
...tect the end of a transition via jQuery:
$("#someSelector").bind("transitionend webkitTransitionEnd oTransitionEnd MSTransitionEnd", function(){ ... });
Mozilla has an excellent reference:
https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Transitions/Using_CSS_transitions#Detecting_the_start_...
How does the main() method work in C?
...ultiple signatures for main, as well as variable-length argument lists, is one of those features.
Programmers noticed that they can pass extra arguments to a function, and nothing bad happens with their given compiler.
This is the case if the calling conventions are such that:
The calling functi...
Git and Mercurial - Compare and Contrast
...an two parents), nor tagging non-commit objects.
Tags: Mercurial uses versioned .hgtags file with special rules for per-repository tags, and has also support for local tags in .hg/localtags; in Git tags are refs residing in refs/tags/ namespace, and by default are autofollowed on fetching and requir...
What does the exclamation mark do before the function?
... it turns it into an expression. It is now a function expression.
The ! alone doesn't invoke the function, of course, but we can now put () at the end: !function foo() {}() which has higher precedence than ! and instantly calls the function.
So what the author is doing is saving a byte per functio...
How to find duplicates in 2 columns not 1
...t up a composite key between the two fields. This will require a unique stone_id and upcharge_title for each row.
As far as finding the existing duplicates try this:
select stone_id,
upcharge_title,
count(*)
from your_table
group by stone_id,
upcharge_title
having...