Question

给定一个字符串数组：

x = ["banana","apple","orange"]

是否有用于执行通配符搜索的内置快捷方式？

即，也许

x.indexOf("*na*") //returns index of a string containing the substring na

Answer 1

扩展Pim的答案，正确的方法（没有jQuery）就是这样：

Array.prototype.find = function(match) {
    return this.filter(function(item){
        return typeof item == 'string' && item.indexOf(match) > -1;
    });
}

但实际上，除非您在多个地方使用此功能，否则您只需使用现有的filter方法：

var result = x.filter(function(item){
    return typeof item == 'string' && item.indexOf("na") > -1;            
});

RegExp版本类似，但我认为它会产生更多的开销：

Array.prototype.findReg = function(match) {
    var reg = new RegExp(match);

    return this.filter(function(item){
        return typeof item == 'string' && item.match(reg);
    });
}

它确实提供了允许您指定有效RegExp字符串的灵活性。

x.findReg('a'); // returns all three
x.findReg("a$"); // returns only "banana" since it's looking for 'a' at the end of the string.

Answer 2

在@Shmiddty的回答中，这里有一些有用的JavaScript想法：

使用新方法扩展数组：Array.prototype.method = function(arg) { return result; }
使用：Array.filter(function(e) { return true|false; })
将公式应用于数组中的元素：Array.map(function(e) { return formula(e); })
使用正则表达式：/.*na.*/或new Regex('.*na.*')
使用正则表达式匹配：var result = regex.test(input);
使用Array.prototype.reduce在对数组的每个元素运行函数后对结果进行aggergate

即。我更喜欢输入参数是一个正则表达式，因此，它给你：

简短但通用的模式匹配输入，
- e.g。包含，开头，结束宽度，以及更复杂的匹配
将输入模式指定为字符串的能力

解决方案1：过滤，测试，制图和索引

Array.prototype.find = function(regex) {
  var arr = this;
  var matches = arr.filter( function(e) { return regex.test(e); } );
  return matches.map(function(e) { return arr.indexOf(e); } );
};
var x = [ "banana", "apple", "orange" ];
console.log(x.find(/na/)); // Contains 'na'? Outputs: [0]
console.log(x.find(/a/)); // Contains 'a'? Outputs: [0,1,2]
console.log(x.find(/^a/)); // Starts with 'a'? Outputs: [0]
console.log(x.find(/e$/)); // Ends with 'e'? Outputs: [1,2]
console.log(x.find(/pear/)); // Contains 'pear'? Outputs: []

解决方案2：减少，测试

Array.prototype.find = function(regex) {
  return this.reduce(function (acc, curr, index, arr) {
    if (regex.test(curr)) { acc.push(index); }
    return acc;
  }, [ ]);
}
var x = [ "banana", "apple", "orange" ];
console.log(x.find(/na/)); // Contains 'na'? Outputs: [0]
console.log(x.find(/a/)); // Contains 'a'? Outputs: [0,1,2]
console.log(x.find(/^a/)); // Starts with 'a'? Outputs: [0]
console.log(x.find(/e$/)); // Ends with 'e'? Outputs: [1,2]
console.log(x.find(/pear/)); // Contains 'pear'? Outputs: []

Answer 3

您可以扩展数组原型以查找数组中的匹配项

Array.prototype.find = function(match) {
    var matches = [];
    $.each(this, function(index, str) {
        if(str.indexOf(match) !== -1) {
            matches.push(index);
        }
    });
    return matches;
}

然后你可以像这样调用你的数组上的find

// returns [0,3]
["banana","apple","orange", "testna"].find('na');

Answer 4

使用正则表达式可以在javascript中执行此操作

var searchin = item.toLowerCase();
var str = columnId;
str = str.replace(/[*]/g, ".*").toLowerCase().trim();
return new RegExp("^"+ str + "$").test(searchin);

Answer 5

除了已经说过的所有其他内容，您还可以执行以下操作：

   public static void CambiarCSVAXLSX(string rutaArchivo) {

        Microsoft.Office.Interop.Excel.Application app = new Microsoft.Office.Interop.Excel.Application();

        Microsoft.Office.Interop.Excel.Workbook wb = app.Workbooks.Open(rutaArchivo, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);


        wb.SaveAs(rutaArchivo.Replace(".csv", ".xlsx"), Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookDefault, Type.Missing, Type.Missing, true, false, XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing);

        wb.Close();

        app.Quit();


        Microsoft.Office.Interop.Excel.Application app2 = new Microsoft.Office.Interop.Excel.Application();

        Microsoft.Office.Interop.Excel.Workbook wb2 = app2.Workbooks.Open(rutaArchivo.Replace(".csv", ".xlsx"), Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing);

        Microsoft.Office.Interop.Excel.Worksheet ws2 = (Worksheet)wb2.Sheets[1];

        Microsoft.Office.Interop.Excel.Range xlCells = ws2.Range["1:2"];

        xlCells.Select();
        xlCells.NumberFormat = "mm/dd/yyyy h:mm";

        wb2.SaveAs(rutaArchivo.Replace(".csv", ".xlsx"), Microsoft.Office.Interop.Excel.XlFileFormat.xlWorkbookDefault, Type.Missing, Type.Missing, true, false, XlSaveAsAccessMode.xlNoChange, Type.Missing, Type.Missing, Type.Missing);

        wb2.Close();

        app2.Quit();


        //mm/dd/yyyy h:mm

        //File.Delete(rutaArchivo);


    }

结果：y = [0]

在Javascript中搜索字符串数组时，我可以使用通配符吗？

5 个答案: