//如果变量存在，是一个字符串，并且其长度大于0，结果为真
if(((typeof unkownVariable != "undefined") && (typeof unkownVariable.valueOf() == "string")) && (unkownVariable.length > 0)){
}↧
检查一个存在的、非空的字符串
↧
Channel:
w3cplus
X
Are you the publisher?
Claim or
contact us
about this channel.
X
0
Channel Details:
- Title: w3cplus
- Channel Number: 3371859
- Language: Chinese
- Registered On: June 8, 2012, 6:15 pm
- Number of Articles: 1557
- Latest Snapshot: March 24, 2019, 5:09 am
- RSS URL: http://www.w3cplus.com/rss.xml
- Publisher: https://www.w3cplus.com
- Description:
- Catalog: //poeticised3.rssing.com/catalog.php?indx=3371859
© 2024 //www.rssing.com