Question

我有一些XML需要被操作成一个字符串来呈现一些指令。文字看起来像这样

<?xml version="1.0" encoding="UTF-8"?>
<instructions id="detection" version="1.0">
<instruction task="detection">
    <phrase type="header">HAS THE CARD TURNED OVER?<nl/><nl/><nl/></phrase>
    <phrase type="practice">you are now going to do a practice.<nl/><nl/></phrase>
    <phrase type="real">You are now going to do a test.<nl/><nl/></phrase>
    <phrase>As soon as the card turns face up:<nl/><nl/></phrase>
    <phrase><ts/><ts/>Press YES.<nl/><nl/></phrase>
    <phrase>Go as fast as you can and try not to make any mistakes.<nl/><nl/></phrase>
    <phrase>If you press YES before a card turns face up, you will hear an error sound.</phrase>
</instruction>
</instructions>

现在，我需要做的就是以下

将所有<nl/>替换为\ n
将所有<ts/>替换为\ t
有条件地选择练习或真实，可能是删除其他
删除剩余的所有XML位以产生字符串。

所以我想说我想要练习这个版本，我最终应该

HAS THE CARD TURNED OVER?\n\n\n
you are now going to do a practice.\n\n
As soon as the card turns face up:\n\n
\t\tPress YES.\n\n
Go as fast as you can and try not to make any mistakes.\n\n
If you press YES before a card turns face up, you will hear an error sound.

现在，我有机会改变XML的结构，如果当前的形式不适合这个，但我不确定是否可以使用e4X完成上述所有操作，或者我还需要使用正则表达式？一些例子会很棒。

Answer 1

可以用E4X完成，可能不如正则表达式那么优雅。以下是使用E4x将<nl>替换为“\ n”的示例：

package
{
    import flash.display.Sprite;

    public class e4xStuff extends Sprite
    {
        private var srcxml:XML;

        public function e4xStuff()
        {
            srcxml = new XML(   '<instructions id="detection" version="1.0">' +
                '<instruction task="detection">' +
                '<phrase type="header">HAS THE CARD TURNED OVER?<nl/><nl/><nl/></phrase>' +
                '<phrase type="practice">you are now going to do a practice.<nl/><nl/></phrase>' +
                '<phrase type="real">You are now going to do a test.<nl/><nl/></phrase>' +
                '<phrase>As soon as the card turns face up:<nl/><nl/></phrase>' +
                '<phrase><ts/><ts/>Press YES.<nl/><nl/></phrase>' +
                '<phrase>Go as fast as you can and try not to make any mistakes.<nl/><nl/></phrase>' +
                '<phrase>If you press YES before a card turns face up, you will hear an error sound.</phrase>' +
                '</instruction>' +
                '</instructions>');


            processNode(srcxml);
            trace(srcxml);
        }

        private function processNode(xml:XML):XML
        {
            //replace <nl/> with \n
            if(xml.name() == "nl")
            {
                return new XML("\n");
            }

            var children:XMLList = xml.children();
            if(children.length() == 0)
            {
                return xml;
            }

            //remove the children
            xml.setChildren(new XMLList());   

            //put the children back, one-by-one, after checking for <nl/>
            for(var i:int=0; i<children.length(); i++)
            {
                xml.appendChild(processNode(children[i])); 
            }
            return xml;
        }
    }
}

E4X方法列表发布在http://wso2.org/project/mashup/0.2/docs/e4xquickstart.html 您可以使用 xml 。@ type

检查练习或真实

我可以使用e4x还是我还需要正则表达式？

1 个答案: