如何用前导空白填充字符串？

Question

我需要在UltraEdit脚本（JavaScript）中测试字符串$ A的长度，如果它小于x（比如说：30），则用前导空白填充它。有以下建议在堆栈溢出中找到，但它似乎不能在UltraEdit脚本中工作。

$AAA .= (" " x (35 - length($AAA))); 

建议感激。

PS：UltraEdit使用脚本的JavaScript核心引擎。

Answer 1

我想你正在寻找的是这样的：

http://msdn.microsoft.com/en-us/library/66f6d830.aspx

Answer 2

在在UltraEdit脚本中使用JavaScript的核心没有要打印格式化成一个字符串变量函数。

但是，使用前导空格或零来创建对齐的字符串非常容易。

实施例为多个的固定长度的输出：

用于对准动态依赖于最高数目的正数

var nNumber = 30;   // number to output right aligned with 4 digits 
var sAlignSpaces = " "; // string containing the spaces (or zeros) for aligning 

// Convert integer number to decimal string. 
var sNumber = nNumber.toString(10); 
// Has the decimal string less than 4 characters as defined by sAlignSpaces? 
if (sNumber.length < sAlignSpaces.length) 
{ 
    // Build decimal string new with X spaces (here 2) from the alignment 
    // spaces string and concatenate this string with the number string. 
    sNumber = sAlignSpaces.substr(0,sAlignSpaces.length-sNumber.length) + sNumber; 
} 
// String sNumber has now always at least 4 characters with 
// 0 to 3 leading spaces depending on decimal value of the number. 

实施例：

var nHighestNumber = 39428; // highest number usually determined before 
var nCurrentNumber = 23;  // current number to output right aligned 

// Convert the highest number to a decimal string and get a copy 
// of this string with every character replaced by character '0'. 
// With highest number being 39428 the created string is "00000". 
var sLeadingZeros = nHighestNumber.toString(10).replace(/./g,"0"); 

// Convert integer number to decimal string. 
var sNumber = nCurrentNumber.toString(10); 
// Has the decimal string of the current number less 
// characters than the decimal string of the highest number? 
if (sNumber.length < sLeadingZeros.length) 
{ 
    // Build decimal string new with X (here 3) zeros from the alignment 
    // string and concatenate this leading zero string with the number string. 
    sNumber = sLeadingZeros.substr(0,sLeadingZeros.length-sNumber.length) + sNumber; 
} 
// String sNumber has now always at least 5 characters with 0 to 4 
// leading zeros depending on decimal value of the positive number.