  |
GoFiler Legato Script Reference
Legato v 1.4j Application v 5.22b
|
| Table of Contents | < < Previous | Next >> |
Chapter Three — Data Types and Operators (continued)
Overview
The IsNullString function checks a string variable or array entry as to whether it ever contained data.
Syntax/Parameters
Syntax
boolean = IsNullString ( string data );
boolean = IsNullString ( wstring data );
Parameters
data
A string or wstring specifying a string or string entry. An incorrect type will result in a runtime error.
Return Value
Returns a boolean value as TRUE if the string or string array entry has never been set.
Remarks
Null differs from empty in that making a string empty is a proactive programming step. For example:
string s;
s = "";
Prior to s being set to an empty string, the value of s is null. From an equivalency standpoint, null and empty are the same. However, if one wanted to know whether an array entry was set to empty or never actually used, a null test is required. For example:
string s[100];
s[50] = "";
In this has, element 50 will be an empty string while 0-49 will be null.
Related Functions
Platform Support
Go13, Go16, GoFiler Complete, GoFiler Corporate, GoFiler, GoFiler Lite, GoXBRL
Legato IDE, Legato Basic
| Table of Contents | < < Previous | Next >> |
© 2012-2024 Novaworks, LLC. All rights reserved worldwide. Unauthorized use, duplication or transmission prohibited by law. Portions of the software are protected by US Patents 10,095,672, 10,706,221 and 11,210,456. GoFiler™ and Legato™ are trademarks of Novaworks, LLC. EDGAR® is a federally registered trademark of the U.S. Securities and Exchange Commission. Novaworks is not affiliated with or approved by the U.S. Securities and Exchange Commission. All other trademarks are property of their respective owners. Use of the features specified in this language are subject to terms, conditions and limitations of the Software License Agreement.