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-rw-r--r--src/dice.js16
-rw-r--r--src/lexer.js1
-rw-r--r--src/parser.js1
3 files changed, 18 insertions, 0 deletions
diff --git a/src/dice.js b/src/dice.js
index e580c9d..53d337d 100644
--- a/src/dice.js
+++ b/src/dice.js
@@ -214,6 +214,21 @@ const threshold = (die1, die2) => {
}
}
+const thresholdLow = (die1, die2) => {
+ return () => {
+ const cutoff = roll(die1)
+
+ return die2().map(die => {
+ return () => {
+ if (die() <= cutoff) {
+ return 1
+ } else {
+ return 0
+ }
+ }
+ })
+ }
+}
exports.pool = pool
exports.roll = roll
@@ -231,3 +246,4 @@ exports.keepLow = keepLow
exports.again = again
exports.againUnder = againUnder
exports.threshold = threshold
+exports.thresholdLow = thresholdLow
diff --git a/src/lexer.js b/src/lexer.js
index f33dc87..ba3d3a5 100644
--- a/src/lexer.js
+++ b/src/lexer.js
@@ -29,6 +29,7 @@ newLexemeType('k', 'k')
newLexemeType('A', 'A')
newLexemeType('a', 'a')
newLexemeType('T', 'T')
+newLexemeType('t', 't')
const lex = (expressionString) => {
let lexemes = []
diff --git a/src/parser.js b/src/parser.js
index f8e2a5b..adb4b9b 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -67,6 +67,7 @@ newDieOperation('k')
newDieOperation('A')
newDieOperation('a')
newDieOperation('T')
+newDieOperation('t')
newInfix('bigPlus', 20, { type: 'add' })
newInfix('bigMinus', 20, { type: 'subtract' })