Difference between revisions of "?"
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==See Also== | ==See Also== | ||
| − | [[??]], [[ECHO]], [[SET SPACE]], [[TRANSFORM()]] | + | [[??]], [[ECHO]], [[Lianja|Lianja System Object]], [[SET DEBUGOUT]], [[SET SPACE]], [[TRANSFORM()]], [[WRITEOUTPUT()]] |
==Description== | ==Description== | ||
| Line 31: | Line 31: | ||
|- | |- | ||
|} | |} | ||
| + | |||
| + | From v8.0 the ? > command can be used in server-side Lianja Server Pages in Web Apps to assist in debugging. | ||
| + | |||
| + | Add the [[SET DEBUGOUT|set debugout on]] command to the .rsp script along with ? > statements then open the App in the browser using [[Deploying_to_Local_Directory#Preview_live_in_browser|Preview live in browser]]. The ? > display can then be monitored in the App Builder Console workspace. | ||
| + | |||
| + | The ? > command supports arrays and objects just like the ? command. | ||
==Example== | ==Example== | ||
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? "price" at 01 picture "@!",1234.56 picture "$99,999.99" | ? "price" at 01 picture "@!",1234.56 picture "$99,999.99" | ||
PRICE $1,234.56 | PRICE $1,234.56 | ||
| + | |||
| + | // Lianja/VFP Server Page (.rsp) example | ||
| + | set debugout on | ||
| + | Lianja.writeoutput("Write this to the debug_server file") | ||
| + | writeOutput("Write this to the App Builder Console workspace") | ||
| + | ? > m_database | ||
| + | ? > _args | ||
| + | set debugout off | ||
</code> | </code> | ||
[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:Commands]] | [[Category:Commands]] | ||
| + | [[Category:Lianja v8.0]] | ||
Latest revision as of 10:01, 7 July 2022
Contents
Purpose
Evaluate expression and output result
Syntax
? <exp> [,<exp>] | ?? <exp> [,<exp>]
[AT <expN>]
[FUNCTION <expC1>]
[PICTURE <expC2>]
[STYLE <expC3>]
See Also
??, ECHO, Lianja System Object, SET DEBUGOUT, SET SPACE, TRANSFORM(), WRITEOUTPUT()
Description
The ? command outputs a carriage return, then a line feed, then evaluates each expression in turn and displays the result. The ?? command evaluates the expression and displays the results on the same line, no carriage return/line feed sequence is output. If more than one expression is specified and SET SPACE is ON, a single space is output between each expression. If SET SPACE is OFF, the expressions are output with no space in between.
| Clause | Description |
|---|---|
| AT <expN> | You may optionally specify the column at which the expression will be output with the AT <expN> clause. |
| PICTURE <expC1> | The PICTURE clause supports all picture template symbols listed in the @...SAY command. |
| FUNCTION <expC2> | The FUNCTION qualifier allows picture functions to be specified. Normally this can be done with the PICTURE qualifier by preceding the picture with '@'. If the FUNCTION qualifier is used the '@' is not needed. |
| STYLE <expC3> | The STYLE qualifier has been added for compatibility with other Xbase languages. |
From v8.0 the ? > command can be used in server-side Lianja Server Pages in Web Apps to assist in debugging.
Add the set debugout on command to the .rsp script along with ? > statements then open the App in the browser using Preview live in browser. The ? > display can then be monitored in the App Builder Console workspace.
The ? > command supports arrays and objects just like the ? command.
Example
? "price" at 01 picture "@!",1234.56 picture "$99,999.99" PRICE $1,234.56 // Lianja/VFP Server Page (.rsp) example set debugout on Lianja.writeoutput("Write this to the debug_server file") writeOutput("Write this to the App Builder Console workspace") ? > m_database ? > _args set debugout off
