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The identity used to sign the executable is no longer valid

... to Preferences --> Accounts --> View Details Press the + symbol and select iOS Development Press the refresh button in the lower left corner (called Download all in Xcode 7) PS: Sometimes it may also help to delete invalid provisioning profiles: right-click -> move to trash I saw this...
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The developers of this app have not set up this app properly for Facebook Login?

.../developers.facebook.com/ Click on the Apps menu on the top bar. Select the respective app from the drop down. The circle next to your app name is not fully green. When you hover mouse on it, you'll see a popup saying, "Not available to all users because your app is not live." So next...
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I want to copy table contained from one database and insert onto another database table

...as below. CREATE TABLE db2.table LIKE db1.table; INSERT INTO db2.table SELECT * FROM db1.table; share | improve this answer | follow | ...
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What is an AngularJS directive?

...on. The ng-model directive binds the value of HTML controls (input, select, textarea) to application data. The ng-bind directive binds application data to the HTML view. <div ng-app=""> <p>Name: <input type="text" ng-model="name"></p> <p ng-bind="name...
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Using LINQ to concatenate strings

... Real example from my code: return selected.Select(query => query.Name).Aggregate((a, b) => a + ", " + b); A query is an object that has a Name property which is a string, and I want the names of all the queries on the selected list, separated by comma...
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Unable to login to SQL Server + SQL Server Authentication + Error: 18456

...tion. You can access this by Right click on instance (IE SQLServer2008) Select "Properties" Select "Security" option Change "Server authentication" to "SQL Server and Windows Authentication mode" Restart the SQLServer service Right click on instance Click "Restart" ...
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MySQL with Node.js

....log('connected as id ' + connection.threadId); connection.query("select * from user",function(err,rows){ connection.release(); if(!err) { res.json(rows); } }); connection.on('error', function(err) { ...
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What is a “callback” in C and how are they implemented?

...ude <string.h> typedef struct { int iValue; int kValue; char label[6]; } MyData; int cmpMyData_iValue (MyData *item1, MyData *item2) { if (item1->iValue < item2->iValue) return -1; if (item1->iValue > item2->iValue) return 1; return 0; } int cmpMyDa...
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Binding a WPF ComboBox to a custom list

I have a ComboBox that doesn't seem to update the SelectedItem/SelectedValue. 4 Answers ...
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How do I simulate a hover with a touch in touch enabled browsers?

...for added usefulness, add this to your CSS as well: .hover { -webkit-user-select: none; -webkit-touch-callout: none; } To stop the browser asking you to copy/save/select the image or whatever. Easy! share ...