英文:
Removing array elements that match with arguments and returning a new array
问题
我在传递的数组上使用forEach()。我传递给forEach()的函数是，如果arrays的元素与给定的某个参数不匹配，则将其推送到newArray中。
然而，我一直得到一个空数组，而我想看到的是newArray = [1, 2]。
我在想我的if语句可能有问题，但我真的看不出问题在哪。我似乎无法找到问题所在。
const removeFromArray = function(arrays, ...args) {
const newArray = [];
arrays.forEach((element) => {
if (!args.includes(element)) {
newArray.push(element);
}
});
return newArray;
}
removeFromArray([1,2,3], 3);
英文:
I am using the forEach() on the array that is passed through. The function I am passing into forEach() is if the element of arrays does not match with one of the arguments given, then push it into the newArray.
However, I keep getting a blank array, when I want to see newArray = [1, 2].
I am thinking there is something wrong with my if statement, but I really don't see what the problem is. I can't seem to put a finger on the issue.
const removeFromArray = function(arrays, ...args) {
const newArray = [];
for (const arg of args) {
if (arrays.forEach((element) => element !== arg))
newArray.push(element);
}
return newArray;
}
removeFromArray([1,2,3], 3);
答案1
得分: 0
尝试使用Array.filter()方法
const removeFromArray = function(arrays, args) {
return arrays.filter(ele => ele !== args)
}
removeFromArray([1,2,3], 3);
英文:
Try using Array.filter() method
const removeFromArray = function(arrays, args) {
return arrays.filter(ele => ele !== args)
}
removeFromArray([1,2,3], 3);
答案2
得分: 0
以下是翻译好的部分：
-
I will assume that you are doing this for a learning experience.
我会假设你这样做是为了学习经验。 -
As others have said, filter is what you should be using.
正如其他人所说，你应该使用 filter。 -
With that said you had a couple errors in your code.
话虽如此，你的代码中有一些错误。 -
You did if(array.forEach... which can not be evaluated as its a iterator and is not truthy
你写了 if(array.forEach...)，这不能被评估，因为它是一个迭代器并且不是真值。 -
You needed to push the element inside the forEach, not outside if it
你需要在 forEach 内部推送元素，而不是在外部 if 语句。 -
const removeFromArray = function(arrays, ...args) {
const removeFromArray = function(arrays, ...args) { -
const newArray = [];
const newArray = []; -
for (const arg of args) {
for (const arg of args) { -
arrays.forEach(element => {
arrays.forEach(element => { -
if (element !== arg){
if (element !== arg){ -
newArray.push(element);
newArray.push(element); -
}
} -
return newArray;
return newArray; -
console.log(removeFromArray([1,2,3], 3));
console.log(removeFromArray([1,2,3], 3));
英文:
I will assume that you are doing this for a learning experience. As others have said, filter is what you should be using. With that said you had a couple errors in your code.
- You did if(array.forEach... which can not be evaluated as its a iterator and is not truthy
- You needed to push the element inside the forEach, not outside if it
<!-- begin snippet: js hide: false console: true babel: false -->
<!-- language: lang-js -->
const removeFromArray = function(arrays, ...args) {
const newArray = [];
for (const arg of args) {
arrays.forEach(element => {
if(element !== arg){
newArray.push(element);
}
})
}
return newArray;
}
console.log(removeFromArray([1,2,3], 3));
<!-- end snippet -->
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