javaScript-2 字符串處理

字符串處理

<!DOCTYPE html>
<html>
  <head>
    <title>字符串處理</title>

  </head>
  <body>
    <h1>字符串處理</h1>
    原始字符串: <span id="originalString"></span><br/>
    trim 去除首尾空格：<span id="trimString"></span><br/>
    indexOf("ho") ho首次出現(xiàn)的位置：<span id="indexOfString"></span><br/>
    split(" ") 把一個(gè)字符串分割成字符串?dāng)?shù)組：<span id="splitString"></span><br/>
    replace(" ","-") 把首個(gè)空格替換為-：<span id="replaceString"></span><br/>
    replaceAll(" ","-") 把所有空格替換為-：<span id="replaceAllString"></span><br/>
    substr(1,3) 索引1-3的值包括1-3 <span id="substrString"></span><br/>
    substring(1,3) 索引1-3的值包括1-2 不包括3 <span id="subString"></span><br/>
    toLowerCase 變更為小寫(xiě) <span id="toLowerCaseString"></span><br/>
    toUpperCase 變更為大寫(xiě) <span id="toUpperCaseString"></span><br />

    <h1>數(shù)據(jù)比對(duì)</h1>
    "3"==3?<span id="spnEquals"></span><br />
        "3"===3?<span id="spnFullEquals"></span><br />
        "4"!=4?<span id="spnNotEquals"></span><br />
        "4"!==4?<span id="spnFullNotEquals"></span><br />

    <script type="text/javascript">
      var originalString = " Welcome to our hotel ";
      var trimString = originalString.trim();
      var indexOfString = originalString.indexOf("ho");
      var splitString = originalString.split(" ");
      var replaceString = originalString.replace(" ","-");
      var replaceAllString = originalString.replaceAll(" ","-");
      var substrString = originalString.substr(1,3);
      var subString = originalString.substring(1,3);
      var toLowerCaseString = originalString.toLowerCase();
          var toUpperCaseString = originalString.toUpperCase();
        


      document.getElementById("originalString").innerText=originalString + "(字符長(zhǎng)度："+originalString.length+")";
      document.getElementById("trimString").innerText=trimString + "(字符長(zhǎng)度："+trimString.length+")";
      document.getElementById("indexOfString").innerText=indexOfString;
      document.getElementById("splitString").innerText=splitString;
      document.getElementById("replaceString").innerText=replaceString;
      document.getElementById("replaceAllString").innerText=replaceAllString;
      document.getElementById("substrString").innerText=substrString;
      document.getElementById("subString").innerText=subString;
      document.getElementById("toLowerCaseString").innerText = toLowerCaseString;
          document.getElementById("toUpperCaseString").innerText = toUpperCaseString;
      document.getElementById("spnEquals").innerText = ("3"==3);
          document.getElementById("spnFullEquals").innerText = ("3"===3);
          document.getElementById("spnNotEquals").innerText = ("4"!=4);
          document.getElementById("spnFullNotEquals").innerText = ("4"!==4);

    </script>
  </body>
</html>

原始字符串:
trim 去除首尾空格：
indexOf("ho") ho首次出現(xiàn)的位置：
split(" ") 把一個(gè)字符串分割成字符串?dāng)?shù)組：
replace(" ","-") 把首個(gè)空格替換為-：
replaceAll(" ","-") 把所有空格替換為-：
substr(1,3) 索引1-3的值包括1-3
substring(1,3) 索引1-3的值包括1-2 不包括3
toLowerCase 變更為小寫(xiě)
toUpperCase 變更為大寫(xiě)

數(shù)據(jù)比對(duì)

"3"==3?
"3"===3?
"4"!=4?
"4"!==4?

posted @ 2022-09-25 23:12 怪圣卡杰閱讀(20) 評(píng)論(0) 收藏舉報(bào)

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javaScript-2 字符串處理

字符串處理

數(shù)據(jù)比對(duì)

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