http - autocomplete through ajax -

-

i want suggest results using auto-complete. need send ajax requests on each keystroke. want keep http connection open few seconds , if typed within period, want send ajax in same connection. if nothing typed in period, want close http connection.

background:

i use typewatch plugin. here http connections made each time send request. still want improve speed. read in thread http://www.philwhln.com/quoras-technology-examined#the-search-box that:

quora uses persistent connections. http connection established server when start typing search query.

how can cross browser support? keep-alive?

you can't. each request-response round trip asynchronous, meaning when it's sent, waits particular request's response return, handles it.

what think want prevent script hammering server. there variety of methods, common use keystroke timer. timer waits specified number of milliseconds after user finishes typing before sending request, containing textbox's value, server.

if you're using jquery can use typewatch plugin this. jquery satisfy cross browser requirements.

however, since want auto-complete, may use jquery autocomplete plugin has keystroke timer built in, default it's set 400 millseconds. click options tab on this page see configuration options can pass plugin.


Comments

Post a Comment

Popular posts from this blog

javascript - Enclosure Memory Copies -

-
function myclass() { //lots , lots of vars , code here. this.bar = function() { //do numerous enclosed myclass vars } this.foo = function() { alert('hello'); //don't enclosed variables. } } each instance of myclass gets own copy of bar , foo, why prototyped methods use less memory. however, know more memory use of inner methods. it seems obvious me (1) below must true. agree? not distinct myclass instances have own distinct copies of bar, must have own distinct copies of myclass enclosure. (or else how bar method keep myclass variables straight on per instance basis?) now (2) question i'm after. since inner foo method doesn't use in myclass enclosure natural qustion is: javascript smart enough not keep myclass enclosure in memory use of foo? this depend entirely on implementation not language. naive implementations keep far more around others. answer true e.g. v8 (chrome's js engine) may not true spider...
Read more

php - Replacing tags in braces, even nested tags, with regex -

-
example preg_replace('/\{[a-za-z.,\(\)0-9]+\}/', 'replaced', 'lorem ipsum dolor sit {tag1({tag2()})}, consectetur adipiscing elit.'); the result: lorem ipsum dolor sit {tag1(replaced)}, consectetur adipiscing elit. question as can see "tag2" has been replaced, want replace "tag1" know how can this? (in cases might this: {tag1({tag2({tag3()})})}) , on.) btw using preg_replace_callback, easier show preg_replace here site can test code: http://www.spaweditor.com/scripts/regex/index.php you need add curly braces character set. here's pattern used: /\{[a-za-z.,\(\)\{\}0-9]+\}/ and here result: "lorem ipsum dolor sit replaced, consectetur adipiscing elit."
Read more