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What is the difference between synchronous and asynchronous programming (in node.js)

...xamples: // Example 1 - Synchronous (blocks) var result = database.query("SELECT * FROM hugetable"); console.log("Query finished"); console.log("Next line"); // Example 2 - Asynchronous (doesn't block) database.query("SELECT * FROM hugetable", function(result) { console.log("Query finished")...
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How to print the current Stack Trace in .NET without any exception?

...oint where you want to see the stack trace. Right-click the breakpoint and select "Actions..." in VS2015. In VS2010, select "When Hit...", then enable "Print a message". Make sure "Continue execution" is selected. Type in some text you would like to print out. Add $CALLSTACK wherever you want to se...
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How do I get a TextBox to only accept numeric input in WPF?

... LengthOfModifiedText(string newText, bool paste) { var countOfSelectedChars = this.AssociatedObject.SelectedText.Length; var caretIndex = this.AssociatedObject.CaretIndex; string text = this.AssociatedObject.Text; if (countOfSelectedChars > 0 || paste) ...
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Cannot open database “test” requested by the login. The login failed. Login failed for user 'xyz\ASP

..., rather than not set up as a login. To test if it's set up as a login SELECT SUSER_ID('xyz\ASPNET') -- (**not** SUSER_SID) If NULL CREATE LOGIN [xyz\ASPNET] FROM WINDOWS If not NULL USE test GO SELECT USER_ID('xyz\ASPNET') If NULL USE test GO CREATE USER [xyz\ASPNET] FROM LOGIN [xyz\AS...
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How do I install Eclipse Marketplace in Eclipse Classic?

...available add the site "Juno - http://download.eclipse.org/releases/juno" Select and expand general purpose tools Select and install Marketplace client share | improve this answer | ...
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How do I view the type of a scala expression in IntelliJ

... Select expression and type Alt + =. If you want to change the shortcut go to Preferences > Keymap and enter "Type Info" in the search field. In older versions, it's Shift + Ctrl + Alt + T. ...
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Could not instantiate class named MKMapView

... project to bring the project settings. Under Targets, click your project, select from the upper toolbar "Build Phases". Under "Link binary With Libraries" tab, you will see the list of frameworks included in your project. Click the "+" button and add MapKit library from the shown list to your proje...
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Algorithm to return all combinations of k elements from n

... takes an array of letters as an argument and a number of those letters to select. 71 Answers ...
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Import CSV file into SQL Server

...e using SQL Server Management Studio • Right click on your database and select Tasks -> Import Data... • Click the Next > button • For the Data Source, select Flat File Source. Then use the Browse button to select the CSV file. Spend some time configuring how you want the data to be...
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Turn off iPhone/Safari input element rounding

... none; border-radius: 0; } Note: Please don't use this code for the Select Option. It will have problem on our select. share | improve this answer | follow ...