1.
functionsay667(){
varnum=666;
varsayAlert=function(){alert(num);}
num ;
returnsayAlert;
}
varsayAlert=say667();
sayAlert();
2.
functionsetUpSomeGlobals(){
varnum=666;
gAlertNumber=function(){alert(num);}
gIncreaseNumber=function(){num ;}
gSetNumber=function(x){num=x;}
}
setUpSomeGlobals();//3 つのグローバル変数に値を割り当てます
gAlertNumber();//666
gIncreaseNumber();
gAlertNumber();//667
gSetNumber(12) );
gAlertNumber();//12
3.
functionbuildList(list) {
varresult=[];
for(vari=0;i
variiteml='item' list[i];
result.push(function() {alert( item '' list[i]);});
}
returnresult;
}
functiontestList(){
varfnlist=buildList([1,2,3]);
for(varj=0;jfnlist[j]() ;
}
}
4.
functionsayAlice(){
varsayAlert=function(){alert(alice);}
varalice='HelloAlice';
returnsayAlert;
}
varhelloAlice=sayAlice();
helloAlice();//HelloAlice
5.
functionnewClosure(someNum, someRef){
varnum=someNum;
varanArray=[1,2,3];
varref=someRef;
returnfunction(x){
num =x;
anArray。 Push(num );
alert('num:' num 'nanArray' anArray.toString() 'nref.someVar' ref.someVar);
}
}
closure1=newClosure(40,{someVar:'closure1'});
closure2=newClosure(1000,{someVar:'closure2'});
クロージャ 1(5);
クロージャ 2(-10);
![[Web フロントエンド] Node.js クイック スタート](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
