JBUILD modes and additive values in QM
jaya...@gmail.com
Martin Phillips
Hi,
There is a mode setting for JBUILD() that converts numeric strings to numbers but nothing to go in the reverse direction converting numbers to quoted strings.
You would need to ensure that the item in the data collection is a string. The following quick example shows one way to do this…
c = collection()
c{'a'} = 123 ;* Save as number
c{'b'} = str(123) ;* Save as string
display jbuild(c)
Martin
From: ope...@googlegroups.com <ope...@googlegroups.com>
On Behalf Of jaya...@gmail.com
Sent: 07 March 2022 03:18
To: OpenQM <ope...@googlegroups.com>
Subject: JBUILD modes and additive values in QM
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Martin Phillips
I mis-read the original email in this thread so my previous response did not resolve the problem.
JBUILD() normally uses the data type of the variables in the data collection to determine the JSON data type. If you have, for example, statement such as
A = DYN<1>
where DYN is a dynamic array with field 1 containing a numeric value, variable A will be a string because field extraction is defined as returning a sting value. The program may go on to do arithmetic operations on this variable and the data type conversion needed will occur automatically as multivalue Basic uses type variant variables.
If you want the numeric value to be a number, the traditional way to convert a numeric string to a number is the rather odd
A = DYN<1> + 0
QMBasic provides explicit type conversion functions that make this a bit clearer.
A = NUMERIC(DYN<1>)
You could use this construct when saving numeric values in elements of a data collection but, if the JSON representation of your data collection is to treat all numeric strings as numbers, you can do
JSON.STRING = JBUILD(COL, JB$NUM)
The JB$NUM token is defined in the KEYS.H include record.
Martin
From: ope...@googlegroups.com <ope...@googlegroups.com>
On Behalf Of jaya...@gmail.com
Sent: 07 March 2022 03:18
To: OpenQM <ope...@googlegroups.com>
Subject: JBUILD modes and additive values in QM
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