diff options
| author | littleblack111 <littleblack11111@gmail.com> | 2026-05-18 23:10:59 +0800 |
|---|---|---|
| committer | littleblack111 <littleblack11111@gmail.com> | 2026-05-18 23:41:44 +0800 |
| commit | fc87c009806dcc98867f6b58efe29b042aa01dee (patch) | |
| tree | 8f59b3f4a5b66e9dfef2d40c8d318e258a521228 /node_modules/math-expression-evaluator/src/postfix_evaluator.js | |
| parent | 3336b2356ee6152d9c6ae59bd9b87ccbc0958407 (diff) | |
node: updatemain
Diffstat (limited to 'node_modules/math-expression-evaluator/src/postfix_evaluator.js')
| -rw-r--r-- | node_modules/math-expression-evaluator/src/postfix_evaluator.js | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/node_modules/math-expression-evaluator/src/postfix_evaluator.js b/node_modules/math-expression-evaluator/src/postfix_evaluator.js deleted file mode 100644 index 037aa889..00000000 --- a/node_modules/math-expression-evaluator/src/postfix_evaluator.js +++ /dev/null @@ -1,89 +0,0 @@ -var Mexp = require('./postfix.js')
-Mexp.prototype.postfixEval = function (UserDefined) {
- 'use strict'
- UserDefined = UserDefined || {}
- UserDefined.PI = Math.PI
- UserDefined.E = Math.E
- var stack = [],
- pop1,
- pop2,
- pop3
- var disp = []
- var temp = ''
- var arr = this.value
- var bool = typeof UserDefined.n !== 'undefined'
- for (var i = 0; i < arr.length; i++) {
- if (arr[i].type === 1) {
- stack.push({ value: arr[i].value, type: 1 })
- } else if (arr[i].type === 3) {
- stack.push({ value: UserDefined[arr[i].value], type: 1 })
- } else if (arr[i].type === 0) {
- if (typeof stack[stack.length - 1].type === 'undefined') {
- stack[stack.length - 1].value.push(arr[i])
- } else stack[stack.length - 1].value = arr[i].value(stack[stack.length - 1].value)
- } else if (arr[i].type === 7) {
- if (typeof stack[stack.length - 1].type === 'undefined') {
- stack[stack.length - 1].value.push(arr[i])
- } else stack[stack.length - 1].value = arr[i].value(stack[stack.length - 1].value)
- } else if (arr[i].type === 8) {
- var popped = []
- for (var x = 0; x < arr[i].numberOfArguments; x++) {
- popped.push(stack.pop().value)
- }
- stack.push({ type: 1, value: arr[i].value.apply(arr[i], popped.reverse()) })
- } else if (arr[i].type === 10) {
- pop1 = stack.pop()
- pop2 = stack.pop()
- if (typeof pop2.type === 'undefined') {
- pop2.value = pop2.concat(pop1)
- pop2.value.push(arr[i])
- stack.push(pop2)
- } else if (typeof pop1.type === 'undefined') {
- pop1.unshift(pop2)
- pop1.push(arr[i])
- stack.push(pop1)
- } else {
- stack.push({ type: 1, value: arr[i].value(pop2.value, pop1.value) })
- }
- } else if (arr[i].type === 2 || arr[i].type === 9) {
- pop1 = stack.pop()
- pop2 = stack.pop()
- if (typeof pop2.type === 'undefined') {
- pop2 = pop2.concat(pop1)
- pop2.push(arr[i])
- stack.push(pop2)
- } else if (typeof pop1.type === 'undefined') {
- pop1.unshift(pop2)
- pop1.push(arr[i])
- stack.push(pop1)
- } else {
- stack.push({ type: 1, value: arr[i].value(pop2.value, pop1.value) })
- }
- } else if (arr[i].type === 12) {
- pop1 = stack.pop()
- if (typeof pop1.type !== 'undefined') {
- pop1 = [pop1]
- }
- pop2 = stack.pop()
- pop3 = stack.pop()
- stack.push({ type: 1, value: arr[i].value(pop3.value, pop2.value, new Mexp(pop1)) })
- } else if (arr[i].type === 13) {
- if (bool) {
- stack.push({ value: UserDefined[arr[i].value], type: 3 })
- } else stack.push([arr[i]])
- }
- }
- if (stack.length > 1) {
- throw new Mexp.Exception('Uncaught Syntax error')
- }
- return stack[0].value > 1000000000000000 ? 'Infinity' : parseFloat(stack[0].value.toFixed(15))
-}
-Mexp.eval = function (str, tokens, obj) {
- if (typeof tokens === 'undefined') {
- return this.lex(str).toPostfix().postfixEval()
- } else if (typeof obj === 'undefined') {
- if (typeof tokens.length !== 'undefined') return this.lex(str, tokens).toPostfix().postfixEval()
- else return this.lex(str).toPostfix().postfixEval(tokens)
- } else return this.lex(str, tokens).toPostfix().postfixEval(obj)
-}
-module.exports = Mexp
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