javascript 在java脚本中从文本文件中搜索字符串
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Search for a string from a text file in java script
提问by Dilip wk
I am creating a Dictionary app for mobile using Java Script. I have stored Dictionary source in a separate file. My doubt is how to access that file and search for particular string using Java Script.
我正在使用 Java 脚本为移动设备创建字典应用程序。我将字典源存储在一个单独的文件中。我的疑问是如何使用 Java Script 访问该文件并搜索特定字符串。
function dic() {
var word = document.getElementById("wo").value;
var dictionary = new Array("Java","Python","Swift","HTML","PHP");
var flag = 0;
for(var i = 0; i < dictionary.length; i++) {
if(dictionary[i] == word) {
document.getElementById("result").innerHTML = "Element Found";
flag = 1;
break;
}
}
if(flag == 0)
document.getElementById("result").innerHTML = "Element Not Found";
}
This script checks for the word in array. I want to replace the array words to a text file. Thanks in advance
此脚本检查数组中的单词。我想将数组单词替换为文本文件。提前致谢
回答by ArtOfCode
To access the file, use jQuery's .get()function. This can also be done with XMLHttpRequestsin pure JS but jQuery will handle cross-browser compatibilty for you.
要访问该文件，请使用 jQuery 的.get()函数。这也可以XMLHttpRequests在纯 JS 中完成，但 jQuery 将为您处理跨浏览器兼容性。
To get the file:
要获取文件：
$.get("http://www.example.com/path/to/file.txt",function(returnedData) {
$("#element").text(returnedData);
},"text/plain");
This will load the contents of http://www.example.com/path/to/file.txtinto the divwith ID element. Assuming each dictionary word is on a new line, you can then separate them into an array with the following:
这会将http://www.example.com/path/to/file.txt的内容加载到divwith ID 中element。假设每个字典单词都在一个新行上，然后您可以将它们分成一个数组，如下所示：
var text = $("#element").text();
var words = text.split("\n");
var dictionary = new Array();
for(var i=0; i < words.length; i++) {
dictionary[i] = words[i];
}
Now you have the dictionary words in your array and can search for them with your existing code (with a couple of corrections):
现在您的数组中有字典单词，并且可以使用现有代码搜索它们（进行一些更正）：
function dic() {
var word = document.getElementById("wo").value;
// var dictionary = new Array("Java","Python","Swift","HTML","PHP");
// This line is unnecessary; use the dictionary var already created.
var flag = 0;
for(var i = 0; i < dictionary.length; i++) {
if(dictionary[i] == word) {
document.getElementById("result").innerHTML = "Element Found";
flag = 1;
break;
}
if(i == dictionary.length - 1) {
document.getElementById("result").innerHTML = "Element Not Found";
}
}
}
That should leave you with the right answer.
这应该给你留下正确的答案。
Hope this helps.
希望这可以帮助。
EDIT:
Part of the code in my second code sample is unnecessary and only there for clarity; you can in fact just state that var dictionary = text.split("\n");, which will yield the same result.
编辑：
我的第二个代码示例中的部分代码是不必要的，只是为了清楚起见；实际上，您可以仅声明var dictionary = text.split("\n");，这将产生相同的结果。
