Question

我试图创建一个程序，该程序将从使用提示输入的某些文本中删除4000个最常用的单词。这是我做的一个循环，该循环一个接一个地删除您在列表中找到的单词，直到索引到达列表的末尾，并且您删除了所有4000个单词（请参见下面的代码）。问题是什么都没有删除，我的输出与输入相同。我的输入是文本“ The Chungus”，“ The”是列表中的第一个单词。

我检查了每个函数和数据类型是否正确，并且确实删除了循环并用CurrentSpaceIndex和CurrentWordStart替换数字，然后输出正确：“ Chungus”。

var x = "The be and of a in to have to ... "; //It's a list of the 4000 most used words in english. 4000 words with a space between them. The length of the string is 29307 characters, so the last character will have index 29306..

var ToSimplifyText = prompt("Please enter the text you wish to simplify:", "");

var WordToRemove;

var CurrentSpaceIndex = 0;

var CurrentWordStart = 0;

var CurrentChar;


while(CurrentSpaceIndex < 29307){
    CurrentChar = x.charAt(CurrentSpaceIndex);
    if (CurrentChar = " "){
    WordToRemove = x.substring(CurrentWordStart, CurrentSpaceIndex);
    ToSimplifyText = ToSimplifyText.replace(WordToRemove, "");
    CurrentWordStart = CurrentSpaceIndex + 1;
    }
    CurrentSpaceIndex = CurrentSpaceIndex + 1;
}
alert(ToSimplifyText);

我希望输出为Chungus，而不是不变的The Chungus。

Answer 1

您正在用非常困难的方式进行操作。您可以按照以下步骤操作：

使用split()将两个字符串都转换为单词数组
然后filter()个来自用户输入的单词出现在单词数组中。
最后使用join()并返回结果。

var x = "The be and of a in to have to"; //It's a list of the 4000 most used words in english. 4000 words with a space between them. The length of the string is 29307 characters, so the last character will have index 29306..
var ToSimplifyText = prompt("Please enter the text you wish to simplify:", "");

const removeWords = (str,words) => str.split(' ').filter(x => !words.includes(x)).join(' ');

ToSimplifyText = removeWords(ToSimplifyText,x.split(' '))

alert(ToSimplifyText);

为什么您的代码不起作用？

原因是使用Assigment运算符而不是比较运算符。

if (CurrentChar = " ")

应该是

if (CurrentChar === " ")

var x = "The be and of a in to have to"; //It's a list of the 4000 most used words in english. 4000 words with a space between them. The length of the string is 29307 characters, so the last character will have index 29306..

var ToSimplifyText = prompt("Please enter the text you wish to simplify:", "");

var WordToRemove;

var CurrentSpaceIndex = 0;

var CurrentWordStart = 0;

var CurrentChar;


while(CurrentSpaceIndex < x.length){
    CurrentChar = x.charAt(CurrentSpaceIndex);
    if (CurrentChar === " "){
    WordToRemove = x.substring(CurrentWordStart, CurrentSpaceIndex);
    console.log(WordToRemove)
    ToSimplifyText = ToSimplifyText.replace(WordToRemove, "");
    CurrentWordStart = CurrentSpaceIndex + 1;
    }
    CurrentSpaceIndex = CurrentSpaceIndex + 1;
}
alert(ToSimplifyText);

为什么ToSimplifyText保持不变？

1 个答案:

为什么您的代码不起作用？