我想比较两个数组,看看是否匹配,是否有做某事。
var answers = new Array("a","b","c","d", "e");
var correct = new Array("a","d");
// do a for loop
// if there's a match console.log(letter + "is the correct answer")
我想比较两个数组,看看是否匹配,是否有做某事。
var answers = new Array("a","b","c","d", "e");
var correct = new Array("a","d");
// do a for loop
// if there's a match console.log(letter + "is the correct answer")
尝试使用这个:
for(var i = 0; i < answers.length; i++) {
for(var j = 0; j < correct.length; j++){
if (answers[i] === correct[j]){
console.log(answers[i]+ " is the correct answer")
break;
}
}
}
看这个帖子,有比较无序数组的代码:http: //blog.maxcnunes.net/2012/08/10/comparacao-de-arrays-desordenados-javascript/
ps:帖子是葡萄牙语的,但你可以使用任何翻译器来理解
试试这个代码:
var a = [1,2,3,4]
, b = [1,3,5,7,9]
, c = ['a','b','c'];
function findDups( arr1, arr2 ) {
var arrs = [ arr1, arr2 ].sort(function( a,b ) {
return a.length > b.length;
});
return arrs[0].filter(function( v ) {
return ~arrs[1].indexOf( v );
});
}
function hasDups( arr1, arr2 ) {
return !!findDups( arr1, arr2 ).length;
}
console.log( findDups( a,b ) ); //=> [1, 3]
console.log( hasDups( a,c ) ); //=> false