Question

我需要帮助;我有一个像这样的数组：

myarray = ["nonsense","goodpart","nonsense2","goodpar2t","nonsense3","goodpart3",]

我需要删除所有＆＃34;废话＆＃34;来自阵列的部分。

废话总是有一个偶数索引。

Answer 1

我建议，基于“无意义”的词总是（如问题中所述）“偶数”元素：

var myarray = ["nonsense", "goodpart", "nonsense2", "goodpar2t", "nonsense3", "goodpart3"],
  filtered = myarray.filter(function(el, index) {
    // normally even numbers have the feature that number % 2 === 0;
    // JavaScript is, however, zero-based, so want those elements with a modulo of 1:
    return index % 2 === 1;
  });

console.log(filtered); // ["goodpart", "goodpar2t", "goodpart3"]

但是，如果您想按数组元素本身进行过滤，则删除包含“废话”一词的所有单词：

var myarray = ["nonsense", "goodpart", "nonsense2", "goodpar2t", "nonsense3", "goodpart3"],
  filtered = myarray.filter(function(el) {
    // an indexOf() equal to -1 means the passed-in string was not found:
    return el.indexOf('nonsense') === -1;
  });

console.log(filtered); // ["goodpart", "goodpar2t", "goodpart3"]

或者只查找并保留以'good'开头的单词：

var myarray = ["nonsense", "goodpart", "nonsense2", "goodpar2t", "nonsense3", "goodpart3"],
  filtered = myarray.filter(function(el) {
    // here we test the word ('el') against the regular expression,
    // ^good meaning a string of 'good' that appears at the beginning of the
    // string:
    return (/^good/).test(el);
  });

console.log(filtered); // ["goodpart", "goodpar2t", "goodpart3"]

参考文献：

Answer 2

这只是@ DavidThomas的好回答（+1）的一个小变化。如果您决定按值（nonsense）而不是按位置（odd）排除数组成员，这将非常有用：

var myarray = ["nonsense", "goodpart", "nonsense2", "goodpar2t", "nonsense3", "goodpart3"],
    filtered = myarray.filter(function(el) {
        //return only values that do not contain 'nonsense'
        return el.indexOf('nonsense') === -1;
    });

var myarray = ["nonsense", "goodpart", "nonsense2", "goodpar2t", "nonsense3", "goodpart3"],
  filtered = myarray.filter(function(el) {
    //return only values that do not contain 'nonsense'
    return el.indexOf('nonsense') === -1;
  });


//output result
$('pre.out').text( JSON.stringify( filtered ) );

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<pre class="out"></div>

用于删除奇数数组元素的JavaScript数组操作

2 个答案: