2020-02-16 标签:js,拦截,alert,对话框,另类,应用,实现,代码,如下,input,type,button,onclick,opened,value,提示,script,var,myalert,window

实现代码如下： var myAlert=alert; window.alert=function(msg){ //your code myAlert (msg+"-TEST"); } function opened(msg){ alert(msg); }

2020-02-16 标签:perl,文件,操作,总结,打开,关闭,open,返回,用来,确定,是否,成功,失败,因此,如下,判断,myfile

一、打开、关闭文件open的返回值用来确定打开文件的操作是否成功，当其成功时返回非零值，失败时返回零，因此可以如下判断：if (open(MYFILE, "myfile")){# here is what to do if the file opened successfully}当文件操作完毕后，