年度博客排行
-
第1名
龙儿筝 -
第2名
宏天软件 -
第3名
青否云后端云 - wallimn
- vipbooks
- gashero
- wy_19921005
- benladeng5225
- fantaxy025025
- e_e
- javashop
- sam123456gz
- zysnba
- tanling8334
- arpenker
- kaizi1992
- xpenxpen
- lemonhandsome
- xiangjie88
- ganxueyun
- xyuma
- wangchen.ily
- Xeden
- jh108020
- johnsmith9th
- zhanjia
- zxq_2017
- jbosscn
- forestqqqq
- ajinn
- daizj
- wjianwei666
- ranbuijj
- 喧嚣求静
- sichunli_030
- kingwell.leng
- silverend
- lchb139128
- kristy_yy
- lich0079
- jveqi
- lzyfn123
- java-007
- sunj
- yeluowuhen
- lerf
- xiaoxinye
- flashsing123
- lxguy
- zhangjijun
最新文章列表
JS函数isNaN() 判断数字
<html>
<body>
<input name="" id="t" type="text" value="0" onchange="isNumber()"/>
</body>
</html>
<script>
...
JS 判断一个值是否为数字
如题:JS中判断一个值是否为数字,以及转换成数字的案例
----------------------
function isNumber(val) {
/*js函数:isNaN(val)。如果是数字则返回false*/
// if(!isNaN(val)){
// alert("是数字");
// }else{
// ...
Chapter 3. Fundamental programming structures in Java -- Core Java Ninth Edition
1. Java is case sensitive.
2. The rules for class names in Java are quite generous. Names must begin with a letter, and after that, they can have any combination of letters and digits.
3. ...