A modifier is a path component that performs custom processing on
the json.
Multiple paths can be "chained" together using the pipe character.
This is useful for getting results from a modified query.
See the README file for more information.
It's a drop in replacement for json.Unmarshal and you can typically see
a 3 to 4 times boost in performance without the need for external tools
or generators.
This function works almost identically to json.Unmarshal except that
it expects the json to be well-formed prior to being called. Invalid
json will not panic, but it may return back unexpected results.
Therefore the return value of this function will always be nil.
Another difference is that gjson.Unmarshal will automatically attempt
to convert JSON values to any Go type. For example, the JSON string
"100" or the JSON number 100 can be equally assigned to Go string,
int, byte, uint64, etc. This rule applies to all types.
It's now possible to query an array for multiple matches by adding the
'#' character immediately following the query.
For example, using the following JSON:
{
"friends": [
{"first": "Dale", "last": "Murphy"},
{"first": "Roger", "last": "Craig"},
{"first": "Jane", "last": "Murphy"}
]
}
To return the first match:
`friends.#[last="Murphy"].first` >> "Dale"
To return all matches:
`friends.#[last="Murphy"]#.first` >> ["Dale","Jane"]
Thanks to @chuttam for requesting this feature, closes#15.
The `GetMany(json, paths...)` function can be used to get multiple
values at one time from the same json string.
This is preferrable to calling `Get(json, path)` over and over.
It's also optimized to scan over a JSON payload once.
This addresses a feature request by @FZambia, and closes#13.
