我正在学习javascript,今天我找到了这段代码:
window.Picture2 = window.Picture2 || {};
我不明白|| {}; 有人可以帮我解释一下吗？Tks这么多:)
我有这个代码
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<link rel="stylesheet" type="text/css" href="../css/style.css" />
<style>
html,body {
width: 100%;
margin: 0;
padding: 0;
}
#main {
margin: 0 auto;
width: 963px;
height: 642px;
}
#preload {
display: block;
position: absolute;
width: 100%;
height: 100%;
}
.loading {
position:absolute;
top: 43%;
left: 47%;
z-index: 2;
display: none;
}
</style>
</head>
<body>
<div id="main">
<img id="preload" src="preload.png"/>
<img class="loading" src="../effects/loading icon/loading3.gif" />
</div>
<script type="text/javascript" src="jquery-1.9.1.min.js"></script>
<script type="text/javascript" src="../player/player.js"></script>
<script type="text/javascript" …我有这个代码
<?php
for($i="a";$i<="z";$i++) {
echo $i;
}
?>
我有一个问题,如果
$i <="y"
它仍然是正确的和回声
a->y
但如果
$i<="z"像上面那样结果将是:
abcdefghijklmnopqrstuvwxyzaaabacadaeafagahaiajakalamanaoapaqarasatauavawaxayazbabbbcbdbebfbgbhbibjbkblbmbnbobpbqbrbsbtbubvbwbxbybzcacbcccdcecfcgchcicjckclcmcncocpcqcrcsctcucvcwcxcyczdadbdcdddedfdgdhdidjdkdldmdndodpdqdrdsdtdudvdwdxdydzeaebecedeeefegeheiejekelemeneoepeqereseteuevewexeyezfafbfcfdfefffgfhfifjfkflfmfnfofpfqfrfsftfufvfwfxfyfzgagbgcgdgegfggghgigjgkglgmgngogpgqgrgsgtgugvgwgxgygzhahbhchdhehfhghhhihjhkhlhmhnhohphqhrhshthuhvhwhxhyhziaibicidieifigihiiijikiliminioipiqirisitiuiviwixiyizjajbjcjdjejfjgjhjijjjkjljmjnjojpjqjrjsjtjujvjwjxjyjzkakbkckdkekfkgkhkikjkkklkmknkokpkqkrksktkukvkwkxkykzlalblcldlelflglhliljlklllmlnlolplqlrlsltlulvlwlxlylzmambmcmdmemfmgmhmimjmkmlmmmnmompmqmrmsmtmumvmwmxmymznanbncndnenfngnhninjnknlnmnnnonpnqnrnsntnunvnwnxnynzoaobocodoeofogohoiojokolomonooopoqorosotouovowoxoyozpapbpcpdpepfpgphpipjpkplpmpnpopppqprpsptpupvpwpxpypzqaqbqcqdqeqfqgqhqiqjqkqlqmqnqoqpqqqrqsqtquqvqwqxqyqzrarbrcrdrerfrgrhrirjrkrlrmrnrorprqrrrsrtrurvrwrxryrzsasbscsdsesfsgshsisjskslsmsnsospsqsrssstsusvswsxsysztatbtctdtetftgthtitjtktltmtntotptqtrtstttutvtwtxtytzuaubucudueufuguhuiujukulumunuoupuqurusutuuuvuwuxuyuzvavbvcvdvevfvgvhvivjvkvlvmvnvovpvqvrvsvtvuvvvwvxvyvzwawbwcwdwewfwgwhwiwjwkwlwmwnwowpwqwrwswtwuwvwwwxwywzxaxbxcxdxexfxgxhxixjxkxlxmxnxoxpxqxrxsxtxuxvxwxxxyxzyaybycydyeyfygyhyiyjykylymynyoypyqyrysytyuyvywyxyyyz
我不知道为什么,有人可以帮帮我吗？
作为标题,我想问一下Controller中有一个方法来获取CakePHP中的当前url吗？
或者我必须在View中执行此操作然后将它的ass参数传递给Controller？
请帮帮我:)
我有一个浮点数.我想像这样围绕它:
1.301 => 1.31
1.309 => 1.31
1.3001 => 1.30
1.3009 => 1.30
到目前为止,我试过这个:
$number = ceil($number * 100) / 100;
这几乎是完美的,但仍然不完美:
1.3301 => 1.34 // It should be 1.33
有办法解决我的问题吗？非常感谢您的帮助.
解决了 来自Niet the Dark Absol的答案:$ number = ceil(floor($ number*1000)/ 10)/ 100;
同样,tks为所有帮助:)