These items will be permanently deleted and cannot be recovered. Are you sure?
Sed vel diam id libero rutrum convallis. Donec aliquet leo vel magna. Phasellus rhoncus faucibus ante. Etiam bibendum, enim faucibus aliquet rhoncus, arcu felis ultricies neque, sit amet auctor elit eros a lectus.
function updateTips( t ) {
tips
.text( t )
.addClass( "ui-state-highlight" );
setTimeout(function() {
tips.removeClass( "ui-state-highlight", 1500 );
}, 500 );
}
给元素添加文字和css样式,并且在500毫秒内移除这个样式。
function checkLength( o, n, min, max ) {
if ( o.val().length > max || o.val().length < min ) {
o.addClass( "ui-state-error" );
updateTips( "Length of " + n + " must be between " +
min + " and " + max + "." );
return false;
} else {
return true;
}
}
检查输入文字的长短,4个参数分别是元素本身,元素名称,最小长度,最大长度。
function checkRegexp( o, regexp, n ) {
if ( !( regexp.test( o.val() ) ) ) {
o.addClass( "ui-state-error" );
updateTips( n );
return false;
} else {
return true;
}
}
用正则表达式检查元素是否符合规则,3个参数,元素本身,正则表达式,错误提示。
function addUser() {
var valid = true;
allFields.removeClass( "ui-state-error" );
valid = valid && checkLength( name, "username", 3, 16 );
valid = valid && checkLength( email, "email", 6, 80 );
valid = valid && checkLength( password, "password", 5, 16 );
valid = valid && checkRegexp( name, /^[a-z]([0-9a-z_\s])+$/i, "Username may consist of a-z, 0-9, underscores, spaces and must begin with a letter." );
valid = valid && checkRegexp( email, emailRegex, "eg. [email protected]" );
valid = valid && checkRegexp( password, /^([0-9a-zA-Z])+$/, "Password field only allow : a-z 0-9" );
if ( valid ) {
$( "#users tbody" ).append( "
Your files have downloaded successfully into the My Downloads folder.
Currently using 36% of your storage space.
Sed vel diam id libero rutrum convallis. Donec aliquet leo vel magna. Phasellus rhoncus faucibus ante. Etiam bibendum, enim faucibus aliquet rhoncus, arcu felis ultricies neque, sit amet auctor elit eros a lectus.
利用JavaScript进行对象排序,根据用户的年龄排序展示
<script>
var bob={
name;bob,
age:30
}
var peter={
name;peter,
age:30
}
var amy={
name;amy,
age:24
}
var mike={
name;mike,
age:29
}
var john={
FLP
One famous theory in distributed computing, known as FLP after the authors Fischer, Lynch, and Patterson, proved that in a distributed system with asynchronous communication and process crashes,
每一行命令都是用分号(;)作为结束
对于MySQL,第一件你必须牢记的是它的每一行命令都是用分号(;)作为结束的,但当一行MySQL被插入在PHP代码中时,最好把后面的分号省略掉,例如:
mysql_query("INSERT INTO tablename(first_name,last_name)VALUES('$first_name',$last_name')");
题目链接:zoj 3820 Building Fire Stations
题目大意:给定一棵树,选取两个建立加油站,问说所有点距离加油站距离的最大值的最小值是多少,并且任意输出一种建立加油站的方式。
解题思路:二分距离判断,判断函数的复杂度是o(n),这样的复杂度应该是o(nlogn),即使常数系数偏大,但是居然跑了4.5s,也是醉了。 判断函数里面做了3次bfs,但是每次bfs节点最多