Add to_entries, from_entries and with_entries functions.

Closes #97.

1 files changed, 3 insertions, 0 deletions

diff --git a/builtin.c b/builtin.c
index 1516c6c6..2a48ba35 100644
--- a/builtin.c
+++ b/builtin.c
@@ -547,6 +547,9 @@ static const char* const jq_builtins[] = {
   "def _assign(paths; value): value as $v | fold . as $obj (path(paths) as $p | $obj | setpath($p; $v));",
   "def _modify(paths; update): fold . as $obj (path(paths) as $p | $obj | setpath($p; getpath($p) | update));",
   "def recurse(f): ., (f | select(. != null) | recurse(f));",
+  "def to_entries: [keys[] as $k | {key: $k, value: .[$k]}];",
+  "def from_entries: map({(.key): .value}) | add;",
+  "def with_entries(f): to_entries | map(f) | from_entries;",
 };