我不想使用服务,我知道它会监视变化,构建和服务.我希望以变化为基础.根据"ng help",build需要参数--watch
ng build构建您的应用程序并将其放入输出路径(默认情况下为dist).--watch(布尔值)(默认值:false)别名:-w --watcher(String)
我尝试了-w和-watcher,但它只是给出了错误.
>ng build -w
Path must be a string. Received null
我希望这段代码能够纵向和横向集中内容.它就是这样,但是一旦我使窗口变小(移动尺寸),文本的(h1和p)对齐就会变为左边.
我错过了非常基本的东西吗？我可以说它text-center有效,但我不想自己添加任何CSS样式.
angular.module('app', ['ngMdIcons', 'ngMaterial']);<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://ajax.googleapis.com/ajax/libs/angular_material/0.10.0/angular-material.min.css">
<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=RobotoDraft:300,400,500,700,400italic">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.2/jquery.min.js"></script>
<script src="https://login.persona.org/include.js"></script>
<script src="https://code.angularjs.org/1.4.0/angular.js"></script>
<script src="https://code.angularjs.org/1.4.0/angular-route.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.0/angular-animate.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.0/angular-aria.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angular_material/0.10.0/angular-material.min.js"></script>
<script src="//cdnjs.cloudflare.com/ajax/libs/angular-material-icons/0.5.0/angular-material-icons.min.js"></script>
</head>
<body layout="column" ng-app="app">
<div layout="row" flex layout-align="center center">
<div layout="column" layout-align="center">
<h1>Welcome to Dreamland!</h1>
<md-button class="md-hue-2 md-raised md-primary" >
<h1 class="md-display-1">Login</h1>
</md-button>
<p class="md-caption">This web site uses your membership with the given email address.</p>
</div>
</div>
</body>
</html>如果第二个哈希中的键值对相同,我想比较哈希值.我不想使用smartmatch,因为它会发出警告.
将两个哈希值与整数,字符串以及可能还有数组进行比较的最佳方法是什么？
use warnings;
use diagnostics;
my $hash1={"key_str"=>"a string", "key_int"=>4};
my $hash2={"key_str"=>"b string", "key_int"=>2};
foreach my $key ( keys(%$hash1) ) {
if ($hash1->{$key} != $hash2->{$key}) {
print($key);
}
}
预期的输出是:
Argument "b string" isn't numeric in numeric ne (!=) at hash_compare.pl line 8 (#1)
(W numeric) The indicated string was fed as an argument to an operator
that expected a numeric value instead. If you're fortunate the message
will identify which operator was so unfortunate.
Argument "a string" isn't numeric …