字符串处理
字符串处理
<!DOCTYPE html>
<html>
<head>
<title>字符串处理</title>
</head>
<body>
<h1>字符串处理</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首次出现的位置：<span id="indexOfString"></span><br/>
split(" ") 把一个字符串分割成字符串数组：<span id="splitString"></span><br/>
replace(" ","-") 把首个空格替换为-：<span id="replaceString"></span><br/>
replaceAll(" ","-") 把所有空格替换为-：<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 变更为小写 <span id="toLowerCaseString"></span><br/>
toUpperCase 变更为大写 <span id="toUpperCaseString"></span><br />
<h1>数据比对</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 + "(字符长度："+originalString.length+")";
document.getElementById("trimString").innerText=trimString + "(字符长度："+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首次出现的位置：
split(" ") 把一个字符串分割成字符串数组：
replace(" ","-") 把首个空格替换为-：
replaceAll(" ","-") 把所有空格替换为-：
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 变更为小写
toUpperCase 变更为大写
数据比对
"3"==3?"3"===3?
"4"!=4?
"4"!==4? 标签：originalString,处理,javaScript,var,getElementById,innerText,字符串,document From： https://www.cnblogs.com/dwdw/p/16729364.html