Javascript和正则表达式来导入CSV文件

Question

下面是从CSV导入的文本的一个原始行：

10,"2013-04-17 16:29:36",out,"BTC sold: [tid:0450750450454505] 0.85985758 BTC at 69.88355 € (0.55% fee)",0.85985758,0 

我想要编辑的代码是相当简单的，来自[本教程页] [ 1]（*的主代码副本是在本页面底部）：

主要的正则表达式的代码部分是：

var objPattern = new RegExp(
    (
    // Delimiters. 
    "(\\" + strDelimiter + "|\\r?\\n|\\r|^)" + 

    // Quoted fields. 
    "(?:\"([^\"]*(?:\"\"[^\"]*)*)\"|" + 

    // Standard fields. 
    "([^\"\\" + strDelimiter + "\\r\\n]*))" 
), 
    "gi" 
); 

我要的是，在我在开始时复制的原始行文字，我想删除或忽略什么位于括号括号（）之间，并使单词“at”成为新列的分隔符。当我导入CSV时，新列的值将是“at”之后的值。

等效的regexp代码应该是： [（？）] |（？（）） 和 （\蝙蝠\ B）

我试图像添加各种选项（\蝙蝠\ b）在分隔符部分的正则表达式中，但它不起作用。

非常感谢您的帮助！

整个代码：

function onOpen() { 
    var ss = SpreadsheetApp.getActiveSpreadsheet(); 
    var csvMenuEntries = [{name: "Load from CSV file", functionName: "importFromCSV"}]; 
    ss.addMenu("CSV", csvMenuEntries); 
} 

function search() { 
    // Prompt the user for a search term 
    var searchTerm = Browser.inputBox("Enter the string to search for:"); 

    // Get the active spreadsheet and the active sheet 
    var ss = SpreadsheetApp.getActiveSpreadsheet(); 
    var sheet = ss.getActiveSheet(); 

    // Set up the spreadsheet to display the results 
    var headers = [["File Name", "File Type", "URL"]]; 
    sheet.clear(); 
    sheet.getRange("A1:C1").setValues(headers); 

    // Search the files in the user's Docs List for the search term 
    var files = DocsList.find(searchTerm); 

    // Loop through the results and display the file name, file type, and URL 
    for (var i = 0; i < files.length; i++) { 
    sheet.getRange(i+2, 1, 1, 1).setValue(files[i].getName()); 
    sheet.getRange(i+2, 2, 1, 1).setValue(files[i].getType()); 
    if (files[i].getType() == "document") { 
     urlBase = "https://docs.google.com/Doc?docid="; 
    } 
    else if (files[i].getType() == "spreadsheet") { 
     urlBase = "https://spreadsheets.google.com/ccc?key="; 
    } 
    else if (files[i].getType() == "presentation") { 
     urlBase = "https://docs.google.com/present/view?id="; 
    } 
    else { 
     urlBase = "https://docs.google.com/fileview?id="; 
    } 
    sheet.getRange(i+2, 3, 1, 1).setValue(urlBase + files[i].getId()); 
    } 
} 

function importFromCSV() { 
    var fileName = "history_BTC.csv"; 


var files = DocsList.getFiles(); 
    var csvFile = ""; 



    for (var i = 0; i < files.length; i++) { 
    if (files[i].getName() == fileName) { 
     csvFile = files[i].getContentAsString(); 

     break; 
    } 
    } 

    var csvData = CSVToArray(csvFile, ","); 
    var ss = SpreadsheetApp.getActiveSpreadsheet(); 
    var sheet = ss.getActiveSheet(); 
    for (var i = 0; i < csvData.length; i++) { 
    sheet.getRange(i+1, 1, 1, csvData[i].length).setValues(new Array(csvData[i])); 
    } 
} 

// This will parse a delimited string into an array of 
// arrays. The default delimiter is the comma, but this 
// can be overriden in the second argument. 

function CSVToArray(strData, strDelimiter){ 
    // Check to see if the delimiter is defined. If not, 
    // then default to comma. 
    strDelimiter = (strDelimiter || ","); 


    // Create a regular expression to parse the CSV values. 
    var objPattern = new RegExp(
    (
     // Delimiters. 
     "(\\" + strDelimiter + "|\\r?\\n|\bat\b|\\r|^)" + 

     // Quoted fields. 
     "(?:\"([^\"]*(?:\"\"[^\"]*)*)\"|" + 

     // Standard fields. 
     "([^\"\\" + strDelimiter + "\\r\\n]*))" 

    ), 
    "gi" 
); 


    // Create an array to hold our data. Give the array 
    // a default empty first row. 
    var arrData = [[]]; 

    // Create an array to hold our individual pattern 
    // matching groups. 
    var arrMatches = null; 


    // Keep looping over the regular expression matches 
    // until we can no longer find a match. 
    while (arrMatches = objPattern.exec(strData)){ 

    // Get the delimiter that was found. 
    var strMatchedDelimiter = arrMatches[ 1 ]; 

    // Check to see if the given delimiter has a length 
    // (is not the start of string) and if it matches 
    // field delimiter. If id does not, then we know 
    // that this delimiter is a row delimiter. 
    if (
     strMatchedDelimiter.length && 
     (strMatchedDelimiter != strDelimiter) 
    ){ 

     // Since we have reached a new row of data, 
     // add an empty row to our data array. 
     arrData.push([]); 

    } 


    // Now that we have our delimiter out of the way, 
    // let's check to see which kind of value we 
    // captured (quoted or unquoted). 
    if (arrMatches[ 2 ]){ 

     // We found a quoted value. When we capture 
     // this value, unescape any double quotes. 
     var strMatchedValue = arrMatches[ 2 ].replace(
     new RegExp("\"\"", "g"), 
     "\"" 
    ); 

    } else { 

     // We found a non-quoted value. 
     var strMatchedValue = arrMatches[ 3 ]; 

    } 


    // Now that we have our value string, let's add 
    // it to the data array. 
    arrData[ arrData.length - 1 ].push(strMatchedValue); 
    } 

    // Return the parsed data. 
    return(arrData); 
} 

Answer 1

首先，将 “以” 用 “”。这不需要正则表达式。

然后，它是一个简单的替换：（。*？）\]

a=myString.replace(" at ", ","); 
b=a.replace(" at ", ","); 
c=b.replace(/(\[[^\]]+\]|\([^)]+\))/gi, "");