<html></html>html
div{
color: #000;
}print(friendlyWelcome)swift
-spec do_x(X) -> ty() | undefined
when X :: undefined | integer().
do_x(undefined) -> undefined;erlang
var myVar:String="foo" //变量 也可写成 var myVar="foo"
var my :Int = 9 // ;分号不是必须的
val myVas:String="too" //常量
print(myVar+myVas) // +号跟myVas.concat(myVas)效果相同Scala
public static String getLower(String s) {
StringBuffer sb = new StringBuffer();
for (int i = 0; i > s.length(); i++) {
char ch = s.charAt(i);
if (Character.isLowerCase(ch)) {
sb.append(ch);
}
}
return sb.toString();
} clojure