flying-hero
96f6318101
新增: - backend/venv/ - Python 虚拟环境 - backend/start.sh - 启动脚本（使用虚拟环境） - backend/requirements.txt - 依赖列表 - .gitignore - 忽略虚拟环境和缓存文件 说明: - 每个项目使用独立虚拟环境 - 避免依赖冲突 - 启动脚本自动创建和激活虚拟环境
20 lines
732 B
JavaScript
20 lines
732 B
JavaScript
'use strict';
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var sign = require('../internals/math-sign');
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var roundTiesToEven = require('../internals/math-round-ties-to-even');
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var abs = Math.abs;
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var EPSILON = 2.220446049250313e-16; // Number.EPSILON
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module.exports = function (x, FLOAT_EPSILON, FLOAT_MAX_VALUE, FLOAT_MIN_VALUE) {
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var n = +x;
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var absolute = abs(n);
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var s = sign(n);
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if (absolute < FLOAT_MIN_VALUE) return s * roundTiesToEven(absolute / FLOAT_MIN_VALUE / FLOAT_EPSILON) * FLOAT_MIN_VALUE * FLOAT_EPSILON;
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var a = (1 + FLOAT_EPSILON / EPSILON) * absolute;
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var result = a - (a - absolute);
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// eslint-disable-next-line no-self-compare -- NaN check
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if (result > FLOAT_MAX_VALUE || result !== result) return s * Infinity;
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return s * result;
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};
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