Timeline for Extracting values from nested rules in JSON data
Current License: CC BY-SA 3.0
13 events
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| Aug 30, 2017 at 14:35 | comment | added | Carl Woll |
You could use the form OptionValue[defaults, ad, {"accept_rate", "age", "badge_counts" -> "bronze", "badge_counts" -> "gold"}] instead. It will complain that defaults is missing a rule for "accept_rate", but that is easy to fix.
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| Apr 13, 2017 at 12:55 | history | edited | CommunityBot |
replaced http://mathematica.stackexchange.com/ with https://mathematica.stackexchange.com/
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| Jul 18, 2015 at 9:54 | history | edited | Mr.Wizard | CC BY-SA 3.0 |
deleted 2 characters in body
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| Jul 18, 2015 at 9:48 | history | edited | Mr.Wizard | CC BY-SA 3.0 |
added 1029 characters in body
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| Jul 18, 2015 at 8:36 | comment | added | Athanassios | @Mr.Wizard your solution is great but it seems to me default values work only for non-nested values. I have tested this by creating another set where "badge_counts"->"gold" value is missing and I am getting an error message Option name badge_counts ->gold not found in defaults for \ {{display_name ->Stones ,accept_rate ->80,account_id \ ->495497,badge_counts ->{bronze ->39,silver ->9}},{age \ ->Missing[],badge_counts ->{bronze ->Missing[NotAvailable ],gold \ ->Missing[NotAvailable ],silver ->Missing[NotAvailable ]}}}. >> | |
| Mar 17, 2012 at 22:42 | comment | added | rcollyer | Not that I am aware of. | |
| Mar 17, 2012 at 22:22 | comment | added | Mr.Wizard | @rcollyer sorry, I wasn't clear; can you set a default value that applies to all options (without having to list all of them), even for a symbol? | |
| Mar 17, 2012 at 18:05 | comment | added | rcollyer |
Exactly, the problem. SetOptions requires a symbol to be associated with the options. In this case, it isn't clear what symbol you'd use.
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| Mar 17, 2012 at 17:07 | comment | added | Mr.Wizard |
@rcollyer how would you do it via SetOptions?
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| Mar 17, 2012 at 17:02 | comment | added | rcollyer |
The only way I'm a aware of is via SetOptions which isn't exactly what you want.
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| Mar 17, 2012 at 13:19 | comment | added | Mr.Wizard |
@rcollyer is there any way to set a default value for any missing option? That would make this more elegant. Nevertheless I think this is the best way to deal with nested rules; getting a value for e.g. a -> b -> c -> d is pretty hairy otherwise.
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| Mar 17, 2012 at 13:13 | comment | added | rcollyer |
+1, I hadn't thought of OptionValue.
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| Mar 17, 2012 at 12:06 | history | answered | Mr.Wizard | CC BY-SA 3.0 |