2017-06-04 42 views
0

首先我要感謝的人已經幫我在這裏獲得的那些的。我的代碼工作,我可以輸出一些正在從文本文件中提取的數字。現在我面臨着在文本文件中有需要提取,但所有行以多行的一項挑戰「數字」。即。下面:使用Javascript - 讀多行文本文件中的行,並報告了陣列

編號:(23.000,12.000),(12.000,11.000)

編號:(13.000,32.000),(42.000,21.000)

編號:(33.000,52.000), (22.000,31.000),

我可以提取號碼時,我的文本文件只有一個行「編號:」你能不能幫我提取多行?附:我不想改變我的代碼太多是可能的。謝謝。

<script type="text/javascript"> 

    var reader = new FileReader(); 

    function readText(that){ 

     if(that.files && that.files[0]){ 
      var reader = new FileReader(); 
      reader.onload = function (e) { 
       var output1=e.target.result; 
       var output2=e.target.result; 
       var output3=e.target.result; 
       var output4=e.target.result;   

//Reads a text file with a line Starting in "Numbers:" that is formated as 
following "Numbers: (23.000,12.000),(11.000,22.000), 
//multiple numbers read by 2      
       output1=(output1.split("\n").filter(/./.test, /Numbers:/).map(line => line.split(/,|\(|\)/).filter(number => number != "")[1]).join("\n")* 2).toFixed(3); 
       output2=(output2.split("\n").filter(/./.test, /Numbers:/).map(line => line.split(/,|\(|\)/).filter(number => number != "")[2]).join("\n")* 2).toFixed(3); 
       output3=(output3.split("\n").filter(/./.test, /Numbers:/).map(line => line.split(/,|\(|\)/).filter(number => number != "")[3]).join("\n")* 2).toFixed(3); 
       output4=(output4.split("\n").filter(/./.test, /Numbers:/).map(line => line.split(/,|\(|\)/).filter(number => number != "")[4]).join("\n")* 2).toFixed(3); 

var n1 = parseFloat(output1), 
n2 = parseFloat(output2), 
n3 = parseFloat(output3), 
n4 = parseFloat(output4), 

//I dont want to print if NaN or 0, that's the reason for list.push and string below 

if (n1) { 
list.push(n1); 
} 

if (n2) { 
list.push(n2); 
} 
if (n3) { 
list.push(n3); 
} 

if (n4) { 
list.push(n4); 
} 
//print my numbers "single line" only. Ideally I want to print multiple lines 

document.getElementById('inputTextToSave').innerHTML = list.toString().replace(/[^,]+,[^,]+,/g, '$&\n'); 

//prints the output as the following 
//(23.000,12.000) 
//(11.000,22.000)    

      };//end onload() 
      reader.readAsText(that.files[0]); 
     }//end if html5 filelist support 
    } 

回答

1

試試看看這個代碼。 我已經按照上面的代碼更改: -

  • 包裹你的代碼到一個for循環來執行它多行
  • 列表數組是循環來存儲所有的行之外。

我已經測試此代碼在我的機器上: -

輸入: - 編號:(23.000,12.000),(12.000,11.000), 編號:(13.000,32.000),(42.000, 21.000),

輸出: - 46,24,24,22,26,64,84,42

我希望它能幫助。

JAVASCRIPT: -

var reader = new FileReader(); 

    function readText(that){ 

     if(that.files && that.files[0]){ 
      var reader = new FileReader(); 
      reader.onload = function (e) { 
       // By lines 
       var lines = e.target.result.split('\n'); 
       var list = []; 
       for(var Fileline = 0; Fileline < lines.length; Fileline++){ 
        var output1 = lines[Fileline]; 
        var output2 = lines[Fileline]; 
        var output3 = lines[Fileline]; 
        var output4 = lines[Fileline]; 
        output1=(output1.split("\n").filter(/./.test, /Numbers:/).map(line => line.split(/,|\(|\)/).filter(number => number != "")[1]).join("\n")* 2).toFixed(3); 
        output2=(output2.split("\n").filter(/./.test, /Numbers:/).map(line => line.split(/,|\(|\)/).filter(number => number != "")[2]).join("\n")* 2).toFixed(3); 
        output3=(output3.split("\n").filter(/./.test, /Numbers:/).map(line => line.split(/,|\(|\)/).filter(number => number != "")[3]).join("\n")* 2).toFixed(3); 
        output4=(output4.split("\n").filter(/./.test, /Numbers:/).map(line => line.split(/,|\(|\)/).filter(number => number != "")[4]).join("\n")* 2).toFixed(3); 

        var n1 = parseFloat(output1), 
        n2 = parseFloat(output2), 
        n3 = parseFloat(output3), 
        n4 = parseFloat(output4); 


        if (n1) { 
        list.push(n1); 
        } 

        if (n2) { 
        list.push(n2); 
        } 
        if (n3) { 
        list.push(n3); 
        } 

        if (n4) { 
        list.push(n4); 
        } 
       } 

//print my numbers "single line" only. Ideally I want to print multiple lines 
console.log(list); 
document.getElementById('inputTextToSave').innerHTML = list.toString().replace(/[^,]+,[^,]+,/g, '$&\n'); 

//prints the output as the following 
//(23.000,12.000) 
//(11.000,22.000)    

      };//end onload() 
      reader.readAsText(that.files[0]); 
     }//end if html5 filelist support 
    } 
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