配列かどうかをどう判断しますか?How to judge whether it is a array ?
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配列かどうかをどう判断しますか?
1、
2、互換性を考慮した場合、
How to judge whether it is a array ?
1、 There are some judgment methods has been added to
2、You can use the function of
1、
es6に新たな判断方法が加わった.if（Array.isArray(value)）{
return true;
}2、互換性を考慮した場合、
toStringの方法を用いることができる.if(!Array.isArray){
Array.isArray = function(arg){
return Object.prototype.toString.call(arg)==='[object Array]'
}
}How to judge whether it is a array ?
1、 There are some judgment methods has been added to
es6 : if（Array.isArray(value)）{
return true;
}2、You can use the function of
toString that consider when the situation of compatibility is considered. if(!Array.isArray){
Array.isArray = function(arg){
return Object.prototype.toString.call(arg)==='[object Array]'
}
}