Question

我正在尝试在textbox / textarea值中查找字符串的实例，到目前为止，我已附加了我的代码：

＆＃13;

$('.message-contents').on('keyup',function(){
  textbox_value = $(this).val();
  //working on code
        var regex = /#{\w.*}/;

 //working on http://regex101.com
//var regex = /^#{\w.*}$/;

window.variable_found = 0
    	if(textbox_value.match(regex)!= null){
    		console.log('found');
    		variable_length = ($(this).val().trim().length);
    		console.log(variable_length);
    		window.variable_found = variable_length ;

    	}
    	else{
    		console.log('not found');
    		
    	}
});

＆＃13;

<textarea class="message-contents"></textarea>

＆＃13;

但这也适用于字符串的后续输入。如何修改我的代码以便在下面给出我想要的结果：

#{string}asasasasas = 9 //desired output;
#{string}asasasasas = 19//current output

我想从＆＃39;＃{＆＃39;开始获取字符串的长度。结束于＆＃39;}＆＃39;。基于所需的输出，即9。

Answer 1

您无法正确访问匹配结果。试试吧：

    Integer[] indexes = new Integer[]{0,2,8,5};
    String[] sources = new String[]{"how", "are", "today", "you"};
    String[] targets = new String[]{"I", "am", "thanks", "fine"};
    Integer[] sortedArrya = Arrays.copyOf(indexes, indexes.length);
    Arrays.sort(sortedArrya);
    String[] sortedSourses = new String[sources.length];
    String[] sortedTargets = new String[targets.length];
    for (int i = 0; i < sortedArrya.length; i++) {
        int intValus = sortedArrya[i];
        int inx = Arrays.asList(indexes).indexOf(intValus);
        sortedSourses[i] = sources[+inx];
        sortedTargets[i] = targets[+inx];
    }
    System.out.println(sortedArrya);
    System.out.println(sortedSourses);
    System.out.println(sortedTargets);

$('.message-contents').on('keyup',function(){
  textbox_value = $(this).val();
        var regex = /#{\w.*}/;

      // The result can be accessed through the `m`-variable.
    	if((m = regex.exec(textbox_value)) !== null){
    		console.log('found');
    		variable_length = m[0].length;
    		console.log(variable_length);
    	}
    	else{
    		console.log('not found');    		
    	}
});

正则表达式 - 搜索特定字符串的匹配项

1 个答案: