javascript function & closure
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javascript function & closure
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javascript function & closure
- 1. S53 #1 1-1 hashmap 1-2 window 1-3 function & execution context 2012.10.17 20:30 ~ 22:30
- 2. text = Javascript result = Parsing Text result = hashmap, hashmap, hashmap, hashmap, hashmap, hashmap, hashmap, hashmap, hashmap, hashmap,..... Bernstein hash hashmap, hashmap, hashmap, hashmap, Fowler-Noll-Vo hash function hashmap, hashmap, hashmap, hashmap, Jenkins hash function hashmap, hashmap, hashmap, hashmap, Pearson hashing hashmap, result hashmap, hashmap, hashmap, Zobrist hashing hashmap, hashmap, hashmap, ... unsigned long hash(unsigned char *str){ unsigned long hash = 5381; int c; while( c = *str++ ) hash = ((hash << 5) + hash) + c; return hash; }
- 3. <html> ( function window(){ <head> this = window||arguments.callee; <script> var val0, val1; var val0 = 'test0'; key0 = 3; val0 = 'test0'; function a(){} this.key0 = 3; </script> function a(){}; <body> val1 = 'test1'; this.key1 = 4; <script> function b(){}; var val1 = 'test1'; key1 = 4; } )(); function b(){} </script> </body> </html>
- 4. wkey = "key"; Function['test'] = { var wVar = "win"; parent: windowEC, locals:{ function test( a ){ a:null, var b; b:null b = ':test'; }, ( function(){ arguments:['a'], var c; body:'.....' c = ':c'; }; alert( a + b + c ); alert( wKey + wVar ); } )(); } test( 'hello' ); testEC = { // hello:test:c a:null, b:null, arguments:{ 0:'hello', length:1, callee: Function['test'] }, this: window, __parent__:Function['test'].parent, test: Function['test'] }; for( i = 0 ; i < testEC.arguments.length ; i++ ) testEC[Function['test'].arguments[i]] = testEC.arguments[i];
- 5. wkey = "key"; testEC.b = ':test'; var wVar = "win"; Function['@35'] = { parent: testEC, function test( a ){ locals:{c:null}, var b; arguments:[], b = ':test'; body:'.....' ( function(){ }; var c; c = ':c'; alert( a + b + c ); @35EC = { alert( wKey + wVar ); c:null, } )(); arguments:{ } length:0, callee:Function['@35'] test( 'hello' ); }, // hello:test:c this: window, __parent__:Function['@35'].parent, test: Function['@35'] }; for( var i = 0 ; i < @35EC.arguments.length ; i++ ) testEC[Function['@35'].arguments[i]] = testEC.arguments[i];
- 6. wkey = "key"; @35EC.c = ':c'; var wVar = "win"; temp = @35EC.__parent__.a + function test( a ){ @35EC.__parent__.b + var b; @35EC.c; b = ':test'; alert( temp ); ( function(){ temp = this.wKey + var c; @35EC.__parent__. __parent__.wVar; c = ':c'; alert( temp ); alert( a + b + c ); alert( wKey + wVar ); delete @35EC; } )(); } delete testEC; test( 'hello' ); // hello:test:c
- 7. function getValue( $ec, $key ){ var result, temp; temp = $ec; while( ( result = temp[$key] ) === undefined ) if( (temp = temp.__parent__ ) === null ) break; if( temp !== null ) return result; temp = $ec.this; while( ( result = temp[$key] ) === undefined ) if( (temp = temp.__prototype__ ) === null ) break; if( temp !== null ) return result; throw new error(); } temp = @35EC.__parent__.a + temp = this.wKey + @35EC.__parent__.b + @35EC.__parent__. __parent__.wVar; @35EC.c; alert( temp ); alert( temp ); temp = getVal( @35EC, 'a' ) + temp = getVal( @35EC, 'wKey') + getVal( @35EC, 'b' ) + getVal( @35EC, 'wVar'); getVal( @35EC, 'c' ); alert( temp ); alert( temp );