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-rw-r--r--src/dice.js20
1 files changed, 20 insertions, 0 deletions
diff --git a/src/dice.js b/src/dice.js
index 14addd4..becf7dc 100644
--- a/src/dice.js
+++ b/src/dice.js
@@ -75,6 +75,25 @@ const keepHigh = (die1, die2) => {
}
}
+const keepLow = (die1, die2) => {
+ return () => {
+ const numberToKeep = roll(die1)
+ let rolls = die2().map(die => [die, die()])
+ rolls.sort((a, b) => (a[1] - b[1]))
+ return rolls.slice(0, numberToKeep).map(pair => {
+ let returnedOriginal = false
+ return () => {
+ if (!returnedOriginal) {
+ returnedOriginal = true
+ return pair[1]
+ } else {
+ return pair[0]()
+ }
+ }
+ })
+ }
+}
+
const bonusAdd = (die1, die2) => {
return () => {
return die1().map(die => {
@@ -92,4 +111,5 @@ exports.subtract = subtract
exports.negative = negative
exports.explode = explode
exports.keepHigh = keepHigh
+exports.keepLow = keepLow
exports.bonusAdd = bonusAdd