javascript 编码规范样例

最新推荐文章于 2025-01-17 22:47:20 发布

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本文深入探讨了AI音视频处理领域中的视频分割与语义识别技术，介绍了其在自动驾驶、AR等领域的重要应用。通过详细解析算法原理与实际案例，为读者提供了一个全面的理解框架。

<!doctype html>
<html>
<head>
<title>Dances With Doggies</title>
<style>
body { font-family : arial, helvetica, san-serif; }
.dog {
position : relative;
padding : 0 16px;
margin : 0 0 12px 0;
border : 2px solid #888;
cursor : pointer;
border-radius : 8px;
-webkit-user-select : none;
box-shadow : 0 0 12px -1px #888;
}
.dog_bg {
position : absolute;
top : 0; left : 0; right : 0; bottom : 0;
display : none;
z-index : -1;
background-color : #ffff00;
}
#dog_house { max-width : 350px; }
</style>
<script type="text/javascript" src=
"http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js">
</script>
<script type="text/javascript">
var spa = (function () {
//---------------- BEGIN MODULE SCOPE VARIABLES --------------
var
// the top-level container
$topBox = null,

// dog container template
htmlDog =
'<div class="dog">'
+ '<div class="dog_bg"></div>'
+ '<h3>Doggy <span class="dog_name"></span></h3>'
+ '<p>Says hello with "<span class="dog_greet"></span>".</p>'
+ '<p>And speaks with "<span class="dog_speak"></span>".</p>'
+ '</div>',

// doggie size list
sizeList = [ 'small', 'medium', 'large' ],

// pre-declare functions and objects
destroyDog, checkDestroy, printGreet, printName,
printSpeak, showFlash, redrawDog, dogPrototype,
hasCreate, createObject, makeDog, initModule
;
//----------------- END MODULE SCOPE VARIABLES ---------------

//------------------- BEGIN UTILITY METHODS ------------------
// Cross-browser method to set __proto__
// Newer js engines (v1.8.5+) support Object.create()
hasCreate = !! Object.create;
createObject = function ( arg ){
if ( ! arg ) { return {}; }
if ( hasCreate ){ return Object.create( arg ); }
function obj() {};
obj.prototype = arg;
return new obj;
};
//-------------------- END UTILITY METHODS -------------------

//--------------------- BEGIN DOM METHODS --------------------
// functions used in dogPrototype
destroyDog = function (){
this.$div.slideUp(function(){$(this).remove();});
};

checkDestroy = function (){
this.redraw_count++;
if ( this.redraw_count > 4 ){
this.destroy_dog();
return false;
}
return true;
};

printGreet = function (){
this.$greet.text( this.greet_text );
};

printName = function (){
this.$name.text( this.dog_name );
};

printSpeak = function (){
this.$speak.text( this.speak_text );
};

showFlash = function (){
this.$bg.css({opacity: 1, display:'block'})
.fadeOut('slow');
};

redrawDog = function (){
this.print_name();
this.print_greet();
this.print_speak();
this.show_flash();
};
//---------------------- END DOM METHODS ---------------------

//------------------- BEGIN PUBLIC METHODS -------------------

// prototype properties and methods of dogs.
// includes default values.
dogPrototype = {
body_temp_c : 36.5,
dog_name : 'Guido',
greet_text : 'Grrrr',
speak_text : 'I am a dog',
height_in_m : 1.0,
leg_count : 4,
check_destroy : checkDestroy,
destroy_dog : destroyDog,
print_greet : printGreet,
print_name : printName,
print_speak : printSpeak,
show_flash : showFlash,
redraw_dog : redrawDog
};

// Begin constructor /makeDog/
makeDog = function ( arg_map ) {
var dog = createObject(dogPrototype),
$dog_div, key_name;

// handle special-case size_index property first
if ( arg_map.hasOwnProperty( 'size_index' ) ){
dog.size_text = sizeList[ arg_map.size_index ];
dog.size_index = arg_map.size_index;
delete arg_map.size_index;
delete arg_map.size_text;
}

// add properties provided by input
for ( key_name in arg_map ){
if ( dogPrototype.hasOwnProperty( key_name ) ) {
dog[ key_name ] = arg_map[ key_name ];
}
}

// populate and map DOM elements using jQuery
$dog_div = $( htmlDog );
dog.$div = $dog_div;
dog.$greet = $dog_div.find('.dog_greet');
dog.$name = $dog_div.find('.dog_name');
dog.$speak = $dog_div.find('.dog_speak');
dog.$bg = $dog_div.find('.dog_bg');
dog.redraw_count = 0;

// render in browser
$dog_div.appendTo( $topBox );
dog.redraw_dog();

return dog;
};
// End constructor /makeDog/

// Begin public method /initModule/
initModule = function ( $top_box ){
$topBox = $top_box;
};

return {
initModule : initModule,
makeDog : makeDog
};
//------------------- END PUBLIC METHODS ---------------------
}());

// Begin test dog objects
$(function (){
var littleDog, mediumDog, bigDog;
spa.initModule( $('#dog_house') );
littleDog = spa.makeDog({
size_index : 0,
dog_name : 'Astro',
greet_text : 'Pant, pant',
speak_text : 'woof, woof'
});

mediumDog = spa.makeDog({ size_index : 1 });

bigDog = spa.makeDog({
size_index : 2,
dog_name : 'Bart',
greet_text : 'Hello human',
speak_text : 'I think, therefore I am'
});

littleDog.$div.click(function (){
if ( littleDog && littleDog.check_destroy() ){
littleDog.dog_name = 'Little Astro';
littleDog.greet_text = 'Rastro!';
littleDog.speak_text = 'yap, yap';
littleDog.redraw_dog();
}
else { littleDog = undefined; }
return false;
});

mediumDog.$div.click(function (){
if ( mediumDog && mediumDog.check_destroy() ){
mediumDog.dog_name = 'Medium Fido';
mediumDog.greet_text = 'rarrr';
mediumDog.speak_text = 'bark, bark';
mediumDog.redraw_dog();
}
else { mediumDog = undefined; }
return false;
});

bigDog.$div.click(function (){
if ( bigDog && bigDog.check_destroy() ){
bigDog.dog_name = 'Big Bart';
bigDog.greet_text = 'Did you hear me?';
bigDog.speak_text = 'I woof loudly, therefore I am';
bigDog.redraw_dog();
}
else { bigDog = undefined; }
return false;
});
});
// End test dog objects

</script>

</head>
<body>
<div id="dog_house"></div>
</body>
</html>