parent-child

问题 I have a set of notification or information items stored in elasticsearch. Once a user has seen a notification I need to mark it as seen by that user. A user can filter documents by read/unread status. Notifications will be viewed by lot of users and seen status will constantly get updated. What is the best way to store this data. Shall I store the list of users which have seen that notification in same document itself or shall I create parent child relationship. 回答1: For sure you should

问题 I have a XML parsing issue that I have been working on for the last few days and I just can't figure it out. I've used both the ElementTree built-in to Python as well as the LXML libraries but get the same results. I would like to continue using ElementTree if I can, but if there are limitations to that library then LXML would do. Please see the following XML example. What I am trying to do is find a connection element and see what classes that element contains. I am expecting each connection

问题 Here is how my folder is structured in google drive: Picture |----------Date1 |-----Pic1.png |-----Pic2.png |----------Date2 |-----Pic3.png |-----Pic4.png Right now I only have the ID of Picture folder (the parentID folder). Now I want to get Pic1 picture (inside Date1 folder). Is it possible to query only 1 time to get the picture with only the Picture folder's ID or I will have to query multiple times (get the Date1 and Date2 folder ID, then continue querying) ? Here is my code right now

问题 Here is how my folder is structured in google drive: Picture |----------Date1 |-----Pic1.png |-----Pic2.png |----------Date2 |-----Pic3.png |-----Pic4.png Right now I only have the ID of Picture folder (the parentID folder). Now I want to get Pic1 picture (inside Date1 folder). Is it possible to query only 1 time to get the picture with only the Picture folder's ID or I will have to query multiple times (get the Date1 and Date2 folder ID, then continue querying) ? Here is my code right now

问题 When I am in a situation where I need pass a significant size of data to a child component, it seems the easiest way to do this is to store it in state and then pass it to children as props inside the render function. I am wondering if there is a less-intensive way to do this. For instance, if I have a relationship like so: <PhotosPage> <PhotoFeed/> </PhotosPage> I know that I want to fetch the 'photo feed' data when the PhotosPage mounts. Let's say I fetch this data in PhotoPage 's

问题 in the php documentation it says: The Scope Resolution Operator (also called Paamayim Nekudotayim) or in simpler terms, the double colon, is a token that allows access to static, constant, and overridden properties or methods of a class. i get an error when i try to access overridden (not static) parent properties: class foo { public $bar = 'foobar'; } class baz extends foo { public $bar = 'bazbar'; public function get_bar() { echo parent::$bar; //Fatal error: Access to undeclared static

问题 I'm trying to get an item that is a pseudo element to change when the parent is hovered over. The pseudo element here is .child:after. I know this works: .parent:hover .child { background: #FF0000; } But this does not seem to work: .parent:hover .child:after { background: #FF0000; } Any ideas? Thank you!! 回答1: Try to add content:'' to ::after pseudo-class; Also be aware that :after works with non-replaced elements (im, input, textarea, and so on) (refference: replaced elements.) Additionally:

问题 This is a continue of another post: JQ, convert CSV (parent child format) to JSON Hi, sorry to ask again. I tried to get the following format, without success. Really appreciate for some advice. I attach a picture to show how it looks like in a hierarchy view a picture to show in a hierarchy way, maybe it is easier. Hope it is possible ? *** CSV file ***** id,parent_id,size Subject,Null,1 analytics,Subject,1 cluster,analytics,1 AgglomerativeCluster,cluster,1 MergeEdge,cluster,2 animate

问题 This is a continue of another post: JQ, convert CSV (parent child format) to JSON Hi, sorry to ask again. I tried to get the following format, without success. Really appreciate for some advice. I attach a picture to show how it looks like in a hierarchy view a picture to show in a hierarchy way, maybe it is easier. Hope it is possible ? *** CSV file ***** id,parent_id,size Subject,Null,1 analytics,Subject,1 cluster,analytics,1 AgglomerativeCluster,cluster,1 MergeEdge,cluster,2 animate

问题 I would like to start a child process in NodeJS and save it's output into a variable. The following code gives it to stdout: require("child_process").execSync("echo Hello World", {"stdio": "inherit"}); I have something in mind that is similar to this code: var test; require("child_process").execSync("echo Hello World", {"stdio": "test"}); console.log(test); The value of test was supposed to be Hello World . Which does not work, since "test" is not a valid stdio value. Perhaps this is possible