From f26f29d84e0a68831a6af14dab3eec5500496d2e Mon Sep 17 00:00:00 2001
From: spring <2396852758@qq.com>
Date: 星期三, 28 五月 2025 16:48:52 +0800
Subject: [PATCH] 初始化项目
---
uni_modules/wu-ui-tools/libs/function/digit.js | 167 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 167 insertions(+), 0 deletions(-)
diff --git a/uni_modules/wu-ui-tools/libs/function/digit.js b/uni_modules/wu-ui-tools/libs/function/digit.js
new file mode 100644
index 0000000..c8260a0
--- /dev/null
+++ b/uni_modules/wu-ui-tools/libs/function/digit.js
@@ -0,0 +1,167 @@
+let _boundaryCheckingState = true; // 鏄惁杩涜瓒婄晫妫�鏌ョ殑鍏ㄥ眬寮�鍏�
+
+/**
+ * 鎶婇敊璇殑鏁版嵁杞
+ * @private
+ * @example strip(0.09999999999999998)=0.1
+ */
+function strip(num, precision = 15) {
+ return +parseFloat(Number(num).toPrecision(precision));
+}
+
+/**
+ * Return digits length of a number
+ * @private
+ * @param {*number} num Input number
+ */
+function digitLength(num) {
+ // Get digit length of e
+ const eSplit = num.toString().split(/[eE]/);
+ const len = (eSplit[0].split('.')[1] || '').length - +(eSplit[1] || 0);
+ return len > 0 ? len : 0;
+}
+
+/**
+ * 鎶婂皬鏁拌浆鎴愭暣鏁�,濡傛灉鏄皬鏁板垯鏀惧ぇ鎴愭暣鏁�
+ * @private
+ * @param {*number} num 杈撳叆鏁�
+ */
+function float2Fixed(num) {
+ if (num.toString().indexOf('e') === -1) {
+ return Number(num.toString().replace('.', ''));
+ }
+ const dLen = digitLength(num);
+ return dLen > 0 ? strip(Number(num) * Math.pow(10, dLen)) : Number(num);
+}
+
+/**
+ * 妫�娴嬫暟瀛楁槸鍚﹁秺鐣岋紝濡傛灉瓒婄晫缁欏嚭鎻愮ず
+ * @private
+ * @param {*number} num 杈撳叆鏁�
+ */
+function checkBoundary(num) {
+ if (_boundaryCheckingState) {
+ if (num > Number.MAX_SAFE_INTEGER || num < Number.MIN_SAFE_INTEGER) {
+ console.warn(`${num} 瓒呭嚭浜嗙簿搴﹂檺鍒讹紝缁撴灉鍙兘涓嶆纭甡);
+ }
+ }
+}
+
+/**
+ * 鎶婇�掑綊鎿嶄綔鎵佸钩杩唬鍖�
+ * @param {number[]} arr 瑕佹搷浣滅殑鏁板瓧鏁扮粍
+ * @param {function} operation 杩唬鎿嶄綔
+ * @private
+ */
+function iteratorOperation(arr, operation) {
+ const [num1, num2, ...others] = arr;
+ let res = operation(num1, num2);
+
+ others.forEach((num) => {
+ res = operation(res, num);
+ });
+
+ return res;
+}
+
+/**
+ * 楂樼簿搴︿箻娉�
+ * @export
+ */
+export function times(...nums) {
+ if (nums.length > 2) {
+ return iteratorOperation(nums, times);
+ }
+
+ const [num1, num2] = nums;
+ const num1Changed = float2Fixed(num1);
+ const num2Changed = float2Fixed(num2);
+ const baseNum = digitLength(num1) + digitLength(num2);
+ const leftValue = num1Changed * num2Changed;
+
+ checkBoundary(leftValue);
+
+ return leftValue / Math.pow(10, baseNum);
+}
+
+/**
+ * 楂樼簿搴﹀姞娉�
+ * @export
+ */
+export function plus(...nums) {
+ if (nums.length > 2) {
+ return iteratorOperation(nums, plus);
+ }
+
+ const [num1, num2] = nums;
+ // 鍙栨渶澶х殑灏忔暟浣�
+ const baseNum = Math.pow(10, Math.max(digitLength(num1), digitLength(num2)));
+ // 鎶婂皬鏁伴兘杞负鏁存暟鐒跺悗鍐嶈绠�
+ return (times(num1, baseNum) + times(num2, baseNum)) / baseNum;
+}
+
+/**
+ * 楂樼簿搴﹀噺娉�
+ * @export
+ */
+export function minus(...nums) {
+ if (nums.length > 2) {
+ return iteratorOperation(nums, minus);
+ }
+
+ const [num1, num2] = nums;
+ const baseNum = Math.pow(10, Math.max(digitLength(num1), digitLength(num2)));
+ return (times(num1, baseNum) - times(num2, baseNum)) / baseNum;
+}
+
+/**
+ * 楂樼簿搴﹂櫎娉�
+ * @export
+ */
+export function divide(...nums) {
+ if (nums.length > 2) {
+ return iteratorOperation(nums, divide);
+ }
+
+ const [num1, num2] = nums;
+ const num1Changed = float2Fixed(num1);
+ const num2Changed = float2Fixed(num2);
+ checkBoundary(num1Changed);
+ checkBoundary(num2Changed);
+ // 閲嶈锛岃繖閲屽繀椤荤敤strip杩涜淇
+ return times(num1Changed / num2Changed, strip(Math.pow(10, digitLength(num2) - digitLength(num1))));
+}
+
+/**
+ * 鍥涜垗浜斿叆
+ * @export
+ */
+export function round(num, ratio) {
+ const base = Math.pow(10, ratio);
+ let result = divide(Math.round(Math.abs(times(num, base))), base);
+ if (num < 0 && result !== 0) {
+ result = times(result, -1);
+ }
+ // 浣嶆暟涓嶈冻鍒欒ˉ0
+ return result;
+}
+
+/**
+ * 鏄惁杩涜杈圭晫妫�鏌ワ紝榛樿寮�鍚�
+ * @param flag 鏍囪寮�鍏筹紝true 涓哄紑鍚紝false 涓哄叧闂紝榛樿涓� true
+ * @export
+ */
+export function enableBoundaryChecking(flag = true) {
+ _boundaryCheckingState = flag;
+}
+
+
+export default {
+ times,
+ plus,
+ minus,
+ divide,
+ round,
+ enableBoundaryChecking,
+};
+
--
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