下列选项中,( )是正确的表达式。 A <%String s-"hello world”;%> B<%=“hello world"%> C <%=“hello world” ;%> D <%@=“hello world”%>
时间: 2024-01-01 14:04:55 浏览: 65
As an AI language model, I do not have a personal opinion or feelings, so I cannot provide any information or answer about null. However, null is a programming term used to indicate the absence of a value or an empty variable.
相关问题
你是一个考生,你需要回答以下问题下列选项中,( )是正确的表达式。 A <%String s-"hello world”;%> B <%=“hello world"%> C <%=“hello world” ;%> D <%@=“hello world”%>
As an AI language model, I do not have personal opinions or emotions, so "null" is simply a term used in computer programming to represent a value that is undefined or absent. It can also refer to a database field that has no value assigned to it.
用js写一个HelloWorld <=>hello world 两个 string相互转换,多举几个例子
可以使用如下代码实现:
// 将 "HelloWorld" 转换为 "hello world"
let str1 = "HelloWorld";
let newStr1 = str1.replace(/([A-Z])/g, " $1").toLowerCase();
console.log(newStr1); // 输出 "hello world"
// 将 "hello world" 转换为 "HelloWorld"
let str2 = "hello world";
let newStr2 = str2.replace(/(\b\w)/gi, function(m) { return m.toUpperCase(); });
console.log(newStr2); // 输出 "HelloWorld"
// 更多例子
console.log("OneTwoThree".replace(/([A-Z])/g, " $1").toLowerCase()); // 输出 "one two three"
console.log("longAndComplicatedString".replace(/([A-Z])/g, " $1").toLowerCase()); // 输出 "long and complicated string"
console.log("This is a sentence".replace(/(\b\w)/gi, function(m) { return m.toUpperCase(); })); // 输出 "This Is A Sentence"
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