Question

我有一个包含文字JavaScript And PHP的字符串。我得到H字符17的位置。我已经获得了H的角色位置，但我现在想要的是获得在17位置具有H字符的单词。这可能与java脚本/ jQuery。如果是，请帮助我获取位置17中有字符的单词。

Answer 1

循环H之前的字符，直到你到达一个空格，然后从空格后的字符（即PHP中的P）开始循环，然后通过那个单词直到你到达一个空格：）

 var stringOld = "javascript and php";
var space = 0;
for(x=17; x>0; x--){
if(stringOld [x] === " ")
{
space = x;
    break;
}
}
for(y=space; y<stringOld.length; y++){
if((stringOld[y] === " ") ||( y=stringOld.length))
{
var newString = stringOld.slice(space,y);
 console.log(newString);
    //alert(newString);
}
}

JSFiddle：http://jsfiddle.net/edrcfq8a/1/

Answer 2

循环前后可以完成此任务。使用代码

<script>
var string = "JavaScript And PHP";
var k = string.substr(0,17);
        var n = k.split(" ");

    var se = n[n.length - 1];

var ke = string.substr(17,string.length);
var n = ke.split(" ");
var see = n[0];
alert(se+see);
</script>

JS FIDDLE：http://jsfiddle.net/56a7711y/

Answer 3

我的想法

＆＃13;

$('#check').on('click',function(){

 var t = $('#text').val();
var a = t.split(' ');

var pos = Number($('#positions').val());
var cha = $('#char').val();

 $('#list').html(''); 
  
a.forEach(function(x){
  
  var $p = x.indexOf(cha,pos)

      if(x.indexOf(cha,pos-1) == pos-1){
        
             $('#list').append('<li>"' + x + '"  position of "' + cha +'" = ' + (x.indexOf(cha,pos-1) + 1) +'</li>');
        
      } 
  
});
  
});

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<textarea id="text" rows="4" cols="100">I have a string which contain the text JavaScript And PHP. I get the position of H character that is 17. I have get the character position of H but what i want now is to get the word which has H character at position 17. Is this possible with java script/jQuery. If yes please help me to get the word in which there is a character at position 17.</textarea>

position : <input type="text" id="positions" value="5" /> <br/>

char : <input type="text" id="char" value="h" /> <br/>

<button id="check"> check word</button>

<ul id=list>
  <li></li>
 </ul>

＆＃13;

我怎样才能通过使用角色来获得这个词

3 个答案: