我如何禁用角色?由于某种原因,我疯狂地梳理了允许的起源和标题但我的ajax请求仍然抱怨我的CORS政策不允许来源....
我的应用控制器:
class ApplicationController < ActionController::Base
protect_from_forgery
before_filter :current_user, :cors_preflight_check
after_filter :cors_set_access_control_headers
# For all responses in this controller, return the CORS access control headers.
def cors_set_access_control_headers
headers['Access-Control-Allow-Origin'] = '*'
headers['Access-Control-Allow-Methods'] = 'POST, GET, OPTIONS'
headers['Access-Control-Allow-Headers'] = '*'
headers['Access-Control-Max-Age'] = "1728000"
end
# If this is a preflight OPTIONS request, then short-circuit the
# request, return only the necessary headers and return an empty
# text/plain.
def cors_preflight_check
if request.method == :options
headers['Access-Control-Allow-Origin'] = '*'
headers['Access-Control-Allow-Methods'] = 'POST, GET, OPTIONS' …Run Code Online (Sandbox Code Playgroud) 不确定为什么会出现这个错误.我正在使用GroupLayout,因为我希望它为我做间距,并将在未来向框架添加更多面板.下面是堆栈跟踪.
Exception in thread "main" java.lang.IllegalArgumentException: GroupLayout can only be used with one Container at a time
at javax.swing.GroupLayout.checkParent(Unknown Source)
at javax.swing.GroupLayout.invalidateLayout(Unknown Source)
at java.awt.Container.invalidate(Unknown Source)
at java.awt.Component.addNotify(Unknown Source)
at java.awt.Container.addNotify(Unknown Source)
at javax.swing.JComponent.addNotify(Unknown Source)
at java.awt.Container.addNotify(Unknown Source)
at javax.swing.JComponent.addNotify(Unknown Source)
at java.awt.Container.addNotify(Unknown Source)
at javax.swing.JComponent.addNotify(Unknown Source)
at javax.swing.JRootPane.addNotify(Unknown Source)
at java.awt.Container.addNotify(Unknown Source)
at java.awt.Window.addNotify(Unknown Source)
at java.awt.Frame.addNotify(Unknown Source)
at java.awt.Window.pack(Unknown Source)
at client.AlternateGUI.drawGui(AlternateGUI.java:54)
at client.AlternateGUI.main(AlternateGUI.java:24)
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这是代码:
package client;
import java.awt.Component;*
public class AlternateGUI {
private JList people;
private DefaultListModel …Run Code Online (Sandbox Code Playgroud) 我有NSCollectionView几个NSViews.其中NSView有一个NSBox在选择时改变颜色.我还希望NSBox在悬停时改变颜色.
我继承NSBox并添加了mouseEntered和mouseExited方法.我addTrackingRect在里面使用viewWillMoveToWindow但问题是只有当我第一次选择框所在的子视图时才会发生悬停效果.
此外,只有选中的框会在其上发生悬停效果.如何实现悬停过度效果,使NSView我的所有s NSCollectionView立即显示效果?
在我的Backbone视图中,我有:
noteTemplate: _.template($('#note-template').html()),
哪个是抛出这个错误.模板是:
<script type="text/template" id="note-template">
<div class="reminder">
<div class="reminder-hover">
<div class="title"><%= title %></div>
<div class="created">Created 3 days ago <span class="pull-right"> In 3 hours</span></div>
</div>
<span class="id" style="display: none;"><%= id %></span>
</div>
</script>
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我很困惑,因为这在我的控制台中有效:
>> _.template($('#note-template').html());
function (n){return e.call(this,n,w)}
这是完整的代码:
App.Views.Index = Backbone.View.extend({
el: $("div.reminders"),
todays : $("span.today"),
tomorrows : $("span.tomorrow"),
weeks : $("span.week"),
all_times : $("span.all-time"),
noteTemplate: _.template($('#note-template').html()),
events: {
"click .reminder" : "editNote",
"click .newNote" : "newNote"
},
initialize : function() {
_.bindAll(this, 'render');
this.notes = this.options.notes; …Run Code Online (Sandbox Code Playgroud) 我有
myDiv.bind('keypress', '> *', function(event) { console.log('keypress') });
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但它似乎没有用.
myDiv是contenteditable,我正在尝试访问正在编辑的p元素.
http://jsfiddle.net/nb5UA/5/(尝试在点击输入后创建的div中输入)
我喜欢让我的代码尽可能简洁,但也许这是不可读的?
var filters = {};
function addFilter(type, name) {
filters[type] && filters[type].push(name) || ( filters[type] = [name] );
}
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甚至(如答案中所指出的):
var filters = {};
function addFilter(type, name) {
filters[type] ? filters[type].push(name) : ( filters[type] = [name] );
}
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-编辑 -
不是不可读但可能是糟糕的风格?另一种方法就是写出来
var filters = {};
function addFilter(type, name) {
if (!filters[type]) {
filters[type]= [];
}
filters[type].push(name);
}
Run Code Online (Sandbox Code Playgroud) 我不记得它叫什么,但我知道我可以用Java做到这一点.假设我有以下内容:
class Foo
{
public:
Foo() {};
void bar() {};
};
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我想做这个:
int main() {
(new Foo).bar();
}
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但它似乎没有用.是否有类似的方法来做到这一点,而不必做:
int main() {
Foo foobar;
foobar.bar();
}
Run Code Online (Sandbox Code Playgroud) 我像这样初始化一个 jQuery 集合
$collection = $([])
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后来发生了一些事情,我做了很多
$collection = $collection.add($element)
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我这样做是为了我可以一次调用$collection.hide()所有元素上的函数。
问题是后来我想做类似的事情,_.contains($collection, $element)但这不起作用。例如:
var $b = $("#content")
var $c = $([]).add(b)
console.log( _.contains($c, $b) )
console.log( _.contains($c.toArray(), $b)
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两者都评估为假。
如何使用 jQuery 实现我的目标?
以下是抛出异常:
Pattern.matches(""+input.charAt(i),"\\s");
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java.util.regex.PatternSyntaxException:
Unclosed character class near index 0.
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我不明白为什么.我匹配的文本是否也需要转义字符?
工作区的屏幕截图,以防它有用.
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