updates | 易学教程

Stop ActiveRecord saving a serialized column even if not changed

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问题 This is very similar to Rails partial updates problem with hashes , but the question has not really been answered IMHO. The problem is this: I have a model with a serialized column: class Import < AR::Base serialize :data In my case, this data will, and should, not change after the first save/creation of the model. So I want to disable the feature of AR that always saves serialized columns (which is normally a good idea, as it can't detect those changes). I want to disable the saving because

Node.js setup for easy deployment and updating

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We're currently developing a website (TYPO3 under Apache) for a customer that is supported by a node.js/socket.io application that provides realtime updates to the content served from the CMS. As this is our first node.js project I don't have any best practices to go by when it comes to 'the perfect setup' so I've spent some time researching deployment techniques. A couple of questions remain for me to achieve a good setup which: Is easy for the customer to deploy . This is very important because our website will be integrated in their 'live' TYPO3 installation which serves an abundance of

how to update the textview variable for every 5 seconds [duplicate]

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Possible Duplicate: Updating TextView every N seconds? Here, I want to update the Hr value in the textview once it is calculated for every iteration, but with a delay of 2 seconds each time. I dont know how to do it. What i get now in the textview is the last value of the iteration. I want all the values to be displayed at a constant delay. anyone help pls. for(int y=1;y<p.length;y++) { if(p[y]!=0) { r=p[y]-p[y-1]; double x= r/500; Hr=(int) (60/x); Thread.sleep(2000); settext(string.valueof(Hr)); } } public class MainActivity extends Activity{ protected static final long TIME_DELAY = 5000; /

Powershell: How to Update/Replace data and values in Json and XML Object

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问题 So I am having a bit of a problem here, I can't seem to figure out how to update data values in an Object so lets say for example the FOLLOWING json { "People": 263, "Hungry": true, "Fruits": { "Apples": 1 "Oranges": 2 }, "Places": { "Places": [{ "Baskets": "true", "name": "Room 1", "candycount": 1500, "candytypespresent": { "candies": [ "caramel" ] } }, { "Baskets": "false", "name": "Room 2", "candycount": 2000, "candytypespresent": { "candies": [ "caramel", "jawbreaker", "butterscotch" ] }

Run local java applet in browser (chrome/firefox) “Your security settings have blocked a local application from running”

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问题 I'm trying to run a Java Applet (html file), but the browser keeps saying: "Your security settings have blocked a local application from running" I have tried using Chrome and Firefox but i get the same error. I have upgraded to the latest version of Java, but Chrome still says in chrome://plugins/ "Download Critical Security Update" even though i can run Java applets (not locally) Im using Ubuntu 13.04 64 bit 回答1: After reading Java 7 Update 21 Security Improvements in Detail mention.. With

Sqlserver.exe has stopped working

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问题 Since installing Visual Studio 2015 Update 3 I have been getting the below error. It happens only when Visual Studio 2015 is open and happens whether I am running as a local admin or not. It is frequent and is irritating, but does not seem to affect any work that I am doing. Code, Server Explorer, VS all work fine bat the error messages popping up and Microsoft Error Reporting taking up long periods of 50% usage of my CPU in the process. Does anyone know how to fix this? I don't want to spend

App Updates, NSURL, and Documents Directory

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I have an app in the app store that uses Core Data to persist much of the data. The exception is storing images. I store images in subdirectories to the Documents directory and store an NSURL reference to that image in the appropriate object attribute in the core data store. We have noticed that, when an update makes it to the app store, those images are not found, and thus don't display, using the references stored with the previous version of the app. Now, I have a suspicion that the problem is that, since we are using development devices for testing, this issue propagates because the

How to update ios6 enterprise apps over the air

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问题 Hello we have developed our first enterprise app recently. We are using the "In-House" option to create the distribution certificate. Client is not using the app yet. But he will be using it soon. Meanwhile i got a question. He will use the app and in future if there are any updates to the app from our side, we want the client to have it updated on his side as well . Like right now I have apps installed on my iPhone. I get update from AppStore saying the XYZ app has been updated. So i install

Update a dataframe in pandas while iterating row by row

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I have a pandas data frame that looks like this (its a pretty big one) date exer exp ifor mat 1092 2014-03-17 American M 528.205 2014-04-19 1093 2014-03-17 American M 528.205 2014-04-19 1094 2014-03-17 American M 528.205 2014-04-19 1095 2014-03-17 American M 528.205 2014-04-19 1096 2014-03-17 American M 528.205 2014-05-17 now I would like to iterate row by row and as I go through each row, the value of ifor in each row can change depending on some conditions and I need to lookup another dataframe. Now, how do I update this as I iterate. Tried a few things none of them worked. for i, row in df

Rails: update_column works, but not update_attributes

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问题 I have a simple model: class Reply < ActiveRecord::Base attr_accessible :body belongs_to :post end In my controller, I have a simple update method: def update @reply = Reply.find(params[:id]) if @reply.update_attributes!(params[:reply]) render :js => "alert('I am trying to update!')" else render :js => "alert('<%= @reply.errors %>')" end end This doesn't throw an error, but neither does it actually update the reply. Instead, I get the "I am trying to update!" message, like everything worked.