GTViewer Expressions and the Expression Playground
Автор: Joey Rogers
Загружено: 2024-09-16
Просмотров: 39
Описание:
This video provides information on GTViewer Expressions and how to use the Expression Playground app to create and test your expressions.
0:00 Introduction
0:10 What's an Expression?
0:59 Where does GTViewer use Expressions?
2:02 Other GTI Apps using Expressions
2:39 The Expression Playground App
3:17 Expressions to compute Values
4:46 Expressions to determine True/False
6:36 Expressions to build Strings/Text
9:01 Using Variables in Expressions
10:39 Using a Feature's Attributes as Variables
14:11 Rules for Variable Names
17:12 Undefined Variables
19:00 Advanced Variable Expressions (IFFUNCT)
22:11 Data Types (INTEGER, DOUBLE, STRING)
22:43 Casting String values to Number values
25:37 Casting Number values to String values
26:05 Literal Strings (single and double quotes)
27:22 Multi-Line Strings (CRLF)
28:15 TRIM Function (trimming spaces)
29:40 FORMAT Function (formatting numbers)
31:39 INSTR (find one string in another)
32:53 SUBSTR (pull out part of a string)
33:33 REPLACE (replace part of a string with another)
34:28 LENGTH (number of characters in a string)
35:08 Explain (debugging your expressions)
38:00 Expression History (reuse your previous expressions)
38:45 Conclusion
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