小编ber*_*erg的帖子

我使用client.upload在pkgcloud上传文件的目录.所有流完成后执行回调的最佳方法是什么？是否有一种内置方式来注册每个流的"完成"事件并在它们全部被触发后执行回调？

var filesToUpload = fs.readdirSync("./local_path"); // will make this async

for(let file of filesToUpload) {
    var writeStream = client.upload({
        container: "mycontainer,
        remote: file
    });
    // seems like i should register finish events with something
    writeStream.on("finish", registerThisWithSomething);
    fs.createReadStream("./local_path/" + file).pipe(writeStream);
}

如何将python方法/槽连接到QML信号？看起来QtObject.connect()曾经在PyQt4中工作,但它在PyQt5中不再可用.

#Sample QML File (stack.qml)

import QtQuick 2.0

Rectangle {
    MouseArea {
        anchors.fill: parent
        onClicked: {
           // relay this to python
        }
    }
}

-

#Sample Python File
from PyQt5.QtCore import QUrl
from PyQt5.QtGui import QGuiApplication
from PyQt5.QtQuick import QQuickView

if __name__ == '__main__':
    import os
    import sys

    app = QGuiApplication(sys.argv)

    view = QQuickView()
    view.setWidth(500)
    view.setHeight(500)
    view.setTitle('Hello PyQt')
    view.setResizeMode(QQuickView.SizeRootObjectToView)
    view.setSource(QUrl.fromLocalFile(os.path.join(os.path.dirname(__file__),'stack.qml')))

    def on_qml_mouse_clicked(mouse_event):
        print 'mouse clicked'

    view.show()
    qml_rectangle = view.rootObject()

    # this technique doesn't work #############################
    qml_rectangle.mousePressEvent.connect(on_qml_mouse_clicked)

    sys.exit(app.exec_())

一些PyQT示例通过"setContextProperty"将对象传递到QML上下文,然后将QML事件中继到该对象上的插槽,但这种方法似乎是迂回的.有没有更好的办法？

我对couchDB很新,甚至在阅读之后(最新的存档已删除)http://wiki.apache.org/couchdb/How_to_store_hierarchical_data(通过'存储每个节点的完整路径作为该节点文档中的属性')它还没有点击.

而不是使用维基中描述的完整路径模式,我希望将子项跟踪为UUID数组,父项作为单个UUID.我倾向于这种模式,所以我可以通过他们在儿童阵列中的位置维持孩子的顺序.

以下是沙发中的一些示例文档,存储桶可以包含存储桶和项目,项目只能包含其他项目.(UUID缩写为清晰):

{_id: 3944
 name: "top level bucket with two items"
 type: "bucket",
 parent: null
 children: [8989, 4839]
}
{_id: 8989
 name: "second level item with no sub items"
 type: "item"
 parent: 3944
}
{
 _id: 4839
 name: "second level bucket with one item"
 type: "bucket",
 parent: 3944
 children: [5694]
}
{
 _id: 5694
 name: "third level item (has one sub item)"
 type: "item",
 parent: 4839,
 children: [5390]
}
{
 _id: 5390
 name: "fourth level item"
 type: …

试图弄清楚如何从MonoMac应用程序中显示webkit控制台或检查器.看起来它可以通过设置WebKitDeveloperExtras在Objective-C中完成.

[USER_DEFAULTS registerDefaults:[NSDictionary dictionaryWithObject: 
[NSNumber numberWithBool:YES] forKey:@"WebKitDeveloperExtras"]];

如何在MonoMac.WebKit.WebView中设置WebDeveloperExtras？