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| -rw-r--r-- | changelog.md | 2 | ||||
| -rw-r--r-- | lib/pure/json.nim | 13 |
2 files changed, 15 insertions, 0 deletions
diff --git a/changelog.md b/changelog.md index 11ac33872..b97fcdd03 100644 --- a/changelog.md +++ b/changelog.md @@ -89,6 +89,8 @@ - Added `posix_utils.osReleaseFile` to get system identification from `os-release` file on Linux and the BSDs. https://www.freedesktop.org/software/systemd/man/os-release.html +- Added `BackwardsIndex` overload for `JsonNode`. + ## Language changes diff --git a/lib/pure/json.nim b/lib/pure/json.nim index 063fad8b4..a9d0ed4cb 100644 --- a/lib/pure/json.nim +++ b/lib/pure/json.nim @@ -496,6 +496,19 @@ proc `[]`*(node: JsonNode, index: int): JsonNode {.inline.} = assert(node.kind == JArray) return node.elems[index] +proc `[]`*(node: JsonNode, index: BackwardsIndex): JsonNode {.inline, since: (1, 5, 1).} = + ## Gets the node at `array.len-i` in an array through the `^` operator. + ## + ## i.e. `j[^i]` is a shortcut for `j[j.len-i]`. + runnableExamples: + let + j = parseJson("[1,2,3,4,5]") + + doAssert j[^1].getInt == 5 + doAssert j[^2].getInt == 4 + + `[]`(node, node.len - int(index)) + proc hasKey*(node: JsonNode, key: string): bool = ## Checks if `key` exists in `node`. assert(node.kind == JObject) |