String Concatenation (JavaScript and Delphi Prism Cross Reference Guide)

To concatenate two strings, a string to an integer, or a string to a floating point number, use the + operator. JavaScript performs implicit casting when concatenating a string and a number. For example, to convert a floating point number to a string just concatenate an empty string to the number as in "" + 3.2.

 

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Unlike Delphi, Prism performs implicit casting. To concatenate two strings, a string to an integer, or a string to a floating point number, use the + operator. For example, to convert a floating point number to a string just concatenate an empty string to the number as in "" + 3.2.

Alternatively, you can use the System.Text.StringBuilder class which frequently but not always provides faster code.

var FirstName : String;

var LastName : String;

FirstName := 'Mike';

LastName := 'Prestwood';

ShowMessage('Full name: ' + FirstName + ' ' + LastName);

//Implicit casting of numbers.

//

//This fails:

//MessageBox.Show(3.3);

//

//This works:

MessageBox.Show("" + 3.3);

 Delphi Prism String Concatenation (+)