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Code Issues 1 Releases Wiki Activity

add lengthable?

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This commit is contained in:
primo-ppcg 2023-08-10 20:54:13 +07:00
parent 7049f658ec
commit 795b64d4d1
2 changed files with 35 additions and 18 deletions
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45
src/boot/boot.janet
View File

@ -1554,32 +1554,41 @@
(defn keys
"Get the keys of an associative data structure."
[x]
(def arr (array/new-filled (length x)))
(var i 0)
(eachk k x
(put arr i k)
(++ i))
arr)
(if (lengthable? x)
(do
(def arr (array/new-filled (length x)))
(var i 0)
(eachk k x
(put arr i k)
(++ i))
arr)
(seq [k :keys x] k)))
(defn values
"Get the values of an associative data structure."
[x]
(def arr (array/new-filled (length x)))
(var i 0)
(each v x
(put arr i v)
(++ i))
arr)
(if (lengthable? x)
(do
(def arr (array/new-filled (length x)))
(var i 0)
(each v x
(put arr i v)
(++ i))
arr)
(seq [v :in x] v)))
(defn pairs
"Get the key-value pairs of an associative data structure."
[x]
(def arr (array/new-filled (length x)))
(var i 0)
(eachp p x
(put arr i p)
(++ i))
arr)
(if (lengthable? x)
(do
(def arr (array/new-filled (length x)))
(var i 0)
(eachp p x
(put arr i p)
(++ i))
arr)
(seq [p :pairs x] p)))
(defn frequencies
"Get the number of occurrences of each value in an indexed data structure."

8
src/core/corelib.c
View File

@ -680,6 +680,13 @@ JANET_CORE_FN(janet_core_is_dictionary,
return janet_wrap_boolean(janet_checktypes(argv[0], JANET_TFLAG_DICTIONARY));
}
JANET_CORE_FN(janet_core_is_lengthable,
"(lengthable? x)",
"Check if x is a bytes, indexed, or dictionary.") {
janet_fixarity(argc, 1);
return janet_wrap_boolean(janet_checktypes(argv[0], JANET_TFLAG_LENGTHABLE));
}
JANET_CORE_FN(janet_core_signal,
"(signal what x)",
"Raise a signal with payload x. ") {
@ -1077,6 +1084,7 @@ static void janet_load_libs(JanetTable *env) {
JANET_CORE_REG("bytes?", janet_core_is_bytes),
JANET_CORE_REG("indexed?", janet_core_is_indexed),
JANET_CORE_REG("dictionary?", janet_core_is_dictionary),
JANET_CORE_REG("lengthable?", janet_core_is_lengthable),
JANET_CORE_REG("slice", janet_core_slice),
JANET_CORE_REG("range", janet_core_range),
JANET_CORE_REG("signal", janet_core_signal),