Is functions

Set default values in matlab

The following Matlab project contains the source code and Matlab examples used for set default values. In order to set default values for variables, I find the start of my functions littered with if nargin < 1 || isempty(x)    x = 1; end if nargin < 2 || isempty(y)    y = 3; end etc.

eliminate distinction between empty, null, and uninitialized values in determining if a variable is empty in visual basic

The following Visual Basic project contains the source code and Visual Basic examples used for eliminate distinction between empty, null, and uninitialized values in determining if a variable is empty. This function, IsNothing, takes a variant parameter and returns true if a string = "", a number = 0, an object is nothing, an array is uninitialized, or a variant is empty.

string validation: isalphabetical, isalphanumeric, and isnumericonly in visual basic

The following Visual Basic project contains the source code and Visual Basic examples used for string validation: isalphabetical, isalphanumeric, and isnumericonly. There are three functions here: One to check if a string contains only alphabetical characters, another to check if a string contains only alphabetical or numeric characters and a third to check if a string contains numeric characters only.

display a string one character at a time (mid function demo) in visual basic

The following Visual Basic project contains the source code and Visual Basic examples used for display a string one character at a time (mid function demo). This snippet answers a commonly-asked beginner's question: How do you get the value of a character at a given position within a string? The answer is to use the Mid function, and this example demonstrates usage of this function to display a string one character at a time.

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