cordova - Cant return variable in recursive function javascript -


hi guys im creating phonegap program using javascript function return values colected in database , problem cant return values becouse in recursive function , everytime call main function doesnt retusn anything

the code is:

function exporta_imoveis(){   var db = window.opendatabase("ithomes", "1.0", "cordova demo", 200000);   db.transaction(function coletandovisitas(tx){     alert('coletando imoveis no bd local ');     tx.executesql('select * imoveis', [], function percorrendolinhas(tx, results){       var len = results.rows.length;       var array_retorno = new array();       (var i=0; i<len; i++){         array_retorno[i] = results.rows.item(i);       }       return array_retorno;     }, function err(){ alert('erro ao coletar') } );               },function erro(){ alert('erro ao coletar dados dos imoveis') }, function acerto(){ alert('dados dos imoveis coletadas com sucesso')} ); } 

i need value of array_retorno variable, please

the problem you're experiencing has nothing recursion asynchronous functions. function percorrendolinhas pass executesql executed when database action finished rest of mainfunction executed first. therefore should use callback:

function exporta_imoveis(callback){   var db = window.opendatabase("ithomes", "1.0", "cordova demo", 200000);   db.transaction(function coletandovisitas(tx){   alert('coletando imoveis no bd local ');   tx.executesql('select * imoveis', [], function percorrendolinhas(tx, results){     var len = results.rows.length;     var array_retorno = new array();     (var i=0; i<len; i++){       array_retorno[i] = results.rows.item(i);     }     callback(array_retorno);   }, function err(){ alert('erro ao coletar') } );               },function erro(){ alert('erro ao coletar dados dos imoveis') }, function acerto(){ alert('dados dos imoveis coletadas com sucesso')} ); }     

you can call function in following way:

exporta_imoveis(function (array_retorno) {    //do array_retorno }); 

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