Question

所以我遇到了这个问题。我正试图摆脱那些逗号。也使用了varArray.join(" ")，但没有成功。我甚至创建了一个for循环，但它没有用（好吧它可能有效，但我是初学者，虽然我对此表示怀疑）。

以下是代码：

let varArray = [];
let rufus1 = document.getElementById('rufus1');
let rufus2 = document.getElementById('rufus2'); // variables for easing syntax

function arrayGiver() {
  varArray.push('<div>' + document.getElementById('rufus1').value + '</div>');
  // I've used `<div>` instead of `<br>` for line breaking the elements, but when I'll be making bigger more complex projects I should probably use `<br>` shouldn't I?

  rufus2.innerHTML = ("You have just added to your collection:" + "<br/>" +
    varArray);
  //this cleans the input after executing the function
  rufus1.value = '';
}


//this makes the function execute on an enter key press
document.addEventListener('keydown', function(enterKey) {
  if (enterKey.keyCode === 13) {
    arrayGiver();
  }
})

<input id="rufus1">
<br>
<br>
<button onclick="arrayGiver();">Bleh</button>
<p id="rufus2"></p>

Answer 1

您可以使用innerHTML或其他循环将数组元素添加到varArray.forEach(e => rufus2.innerHTML += e);

对于这个答案我用过：

迭代数组，将每个元素（rufus2.innerHTML）添加到let varArray = []; let rufus1 = document.getElementById('rufus1'); let rufus2 = document.getElementById('rufus2'); // variables for easing syntax function arrayGiver() { varArray.push('<div>' + document.getElementById('rufus1').value + '</div>'); // I've used `<div>` instead of `<br>` for line breaking the elements, but when I'll be making bigger more complex projects I should probably use `<br>` shouldn't I? rufus2.innerHTML = ("You have just added to your collection:" + "<br/>"); varArray.forEach(e => rufus2.innerHTML += e); //this cleans the input after executing the function rufus1.value = ''; } //this makes the function execute on an enter key press document.addEventListener('keydown', function(enterKey) { if (enterKey.keyCode === 13) { arrayGiver(); } })。

<input id="rufus1">
<br>
<br>
<button onclick="arrayGiver();">Bleh</button>
<p id="rufus2"></p>

private void populateSpinner() {
    lables = new ArrayList<String>();
    quanty = new ArrayList<Integer>();
    sl = new ArrayList<String>();
    s_q = new ArrayList<String>();
    s_pcode = new ArrayList<String>();
    db=new DatabaseHandler(Offlineordupdate.this);
    arrayList = db.getProductdetails();
    arrayList2 = db.getsavedProductdetails();

    int h=0;

    if (arrayList.size() != 0) {
        for (int i = 0; i < arrayList.size(); i++) {
            sl.add(arrayList.get(i).getproductsl());
            lables.add(arrayList.get(i).getproductname());
            p_code.add(arrayList.get(i).getproductcode());
            PROD_RATE.add(arrayList.get(i).getproductrate());
            PROD_VAT.add(arrayList.get(i).getproductvat());
            nameSerialPair.put(arrayList.get(i).getproductname(), Integer.parseInt(arrayList.get(i).getproductsl()));

            if (arrayList2.size() != 0) {
                for (int j = 0; j < arrayList2.size(); j++) {
                    s_pcode.add(arrayList.get(i).getproductcode());
                    s_q.add(arrayList2.get(j).getproductquant());
                    Log.d("Saved Product details",""+ s_pcode + s_q );
                }
            }

           if( p_code.equals(s_pcode)) {
               int p_serial = Integer.parseInt(arrayList.get(i).getproductsl());
               mapQuantity.put(p_serial, String.valueOf(arrayList2.get(i).getproductquant()));    
           }

            int p_serial = Integer.parseInt(arrayList.get(i).getproductsl());
            mapQuantity.put(p_serial, String.valueOf(arrayList.get(i).getproductquant()));
        }
    }

    if (arrayList2.size() != 0) {
        for (int j = 0; j < arrayList2.size(); j++) {

           mapQuantity.put(p_serial, String.valueOf(arrayList.get(j).getproductquant()));
        }
    }

    adapter = new OfflineProductListupdateAdapter(Offlineordupdate.this, sl ,lables, mapQuantity);
    productListView.setAdapter(adapter);
}

Answer 2

因为数组在转换为字符串时自动将逗号添加为分隔符。您只需在join(' ')上使用varArray，就可以摆脱这种情况，如下所示

    let varArray = [];
    let rufus1 = document.getElementById('rufus1');
    let rufus2 = document.getElementById('rufus2');
    // variables for easing syntax



    function arrayGiver() {
      varArray.push('<div>' + document.getElementById('rufus1').value + '</div>') // I've used `<div>` instead of `<br>` for line breaking the elements, but when I'll be making bigger more complex projects I should probably use `<br>` shouldn't I?

      rufus2.innerHTML = ("You have just added to your collection:" + "<br/>" +
        varArray.join(' '));
      //this cleans the input after executing the function
      rufus1.value = '';
    }


    //this makes the function execute on an enter key press
    document.addEventListener('keydown', function (enterKey) {
      if (enterKey.keyCode === 13) {
        arrayGiver();
      }
    })

  <input id="rufus1" type="text">
  <br>
  <br>
  <button onclick="arrayGiver();">Bleh</button>
  <p id="rufus2"></p>

Answer 3

要达到预期的结果，请使用字符串变量而不是数组，如下所示

let varArray = [];
var list ='';
let rufus1 = document.getElementById('rufus1');
let rufus2 = document.getElementById('rufus2');
// variables for easing syntax



function arrayGiver(){
  list = list + '<div>' + document.getElementById('rufus1').value + '</div>'
  rufus2.innerHTML = ("You have just added to your collection:" + "<br/>" + list);
  list.value = '';
}

https://codepen.io/nagasai/pen/bvQKbX

＆＃13;

let varArray = [];
var list ='';
let rufus1 = document.getElementById('rufus1');
let rufus2 = document.getElementById('rufus2');
// variables for easing syntax

   

function arrayGiver(){
  list = list + '<div>' + document.getElementById('rufus1').value + '</div>'
  rufus2.innerHTML = ("You have just added to your collection:" + "<br/>" + list);
  list.value = '';
}

document.addEventListener('keydown', function(enterKey) {
  if(enterKey.keyCode === 13){
    arrayGiver();
  }
})

＆＃13;

body {
  font-family: Arial;
  font-size: 24px;
}

button {
  width: 100px;
  height: 25px;
}

＆＃13;

<input id="rufus1">
<br>
<br>
<button onclick="arrayGiver();">Bleh</button>
<p id="rufus2"></p>

＆＃13;

从HTML中的数组中删除逗号[element.innerHTML]

3 个答案: