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# Standard Library Cheatsheet
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- Last updated: Mon, 30 Dec 2019 06:06:12 GMT
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+ Last updated: Mon, 30 Dec 2019 12:00:50 GMT
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## Usage
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| Wenyan | Javascript Equivalent |
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| ---| ---|
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| [ ` 圓周率 ` ] ( ../lib/算經.wy#L166 ) | ` Math.PI ` |
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- | [ ` 下溢 ` ] ( ../lib/算經.wy#L186 ) | ` Math.floor ` |
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- | [ ` 下溢 ` ] ( ../lib/算經.wy#L191 ) | ` Math.ceil ` |
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- | [ ` 正弦 ` ] ( ../lib/算經.wy#L462 ) | ` Math.sin ` |
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- | [ ` 餘弦 ` ] ( ../lib/算經.wy#L492 ) | ` Math.cos ` |
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- | [ ` 反餘弦 ` ] ( ../lib/算經.wy#L527 ) | ` Math.acos ` |
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- | [ ` 正切 ` ] ( ../lib/算經.wy#L534 ) | ` Math.tan ` |
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- | [ ` 反正切 ` ] ( ../lib/算經.wy#L571 ) | ` Math.atan ` |
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+ | [ ` 正弦 ` ] ( ../lib/算經.wy#L460 ) | ` Math.sin ` |
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+ | [ ` 餘弦 ` ] ( ../lib/算經.wy#L490 ) | ` Math.cos ` |
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+ | [ ` 反正弦 ` ] ( ../lib/算經.wy#L498 ) | ` Math.asin ` |
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+ | [ ` 反餘弦 ` ] ( ../lib/算經.wy#L525 ) | ` Math.acos ` |
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+ | [ ` 正切 ` ] ( ../lib/算經.wy#L532 ) | ` Math.tan ` |
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+ | [ ` 反正切 ` ] ( ../lib/算經.wy#L569 ) | ` Math.atan ` |
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+ | [ ` 對數 ` ] ( ../lib/算經.wy#L656 ) | ` Math.log ` |
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+ | [ ` 冪 ` ] ( ../lib/算經.wy#L734 ) | ` Math.pow ` |
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+ | [ ` 平方根 ` ] ( ../lib/算經.wy#L758 ) | ` Math.sqrt ` |
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+ | [ ` 絕對 ` ] ( ../lib/算經.wy#L819 ) | ` Math.abs ` |
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+ | [ ` 取頂 ` ] ( ../lib/算經.wy#L824 ) | ` Math.ceil ` |
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+ | [ ` 取底 ` ] ( ../lib/算經.wy#L829 ) | ` Math.floor ` |
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+ | [ ` 取整 ` ] ( ../lib/算經.wy#L844 ) | ` Math.round ` |
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+ | [ ` 取整 ` ] ( ../lib/算經.wy#L858 ) | ` Math.trunc ` |
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## [ 籌經] ( ../lib/籌經.wy )
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| Wenyan | Javascript Equivalent |
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| ---| ---|
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- | [ ` 左移 ` ] ( ../lib/js/位經.wy#L1 ) | ` (x=>y=>(x<<y)) ` |
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+ | [ ` 左移 ` ] ( ../lib/js/位經.wy#L1 ) | ` x<<y ` |
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+ | [ ` 右移 ` ] ( ../lib/js/位經.wy#L6 ) | ` x>>y ` |
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+ | [ ` 補零右移 ` ] ( ../lib/js/位經.wy#L11 ) | ` x>>>y ` |
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+ | [ ` 位与 ` ] ( ../lib/js/位經.wy#L16 ) | ` x&y ` |
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+ | [ ` 位或 ` ] ( ../lib/js/位經.wy#L21 ) | `x| y` |
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+ | [ ` 异或 ` ] ( ../lib/js/位經.wy#L26 ) | ` x^y ` |
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+ | [ ` 与非 ` ] ( ../lib/js/位經.wy#L31 ) | ` ~(x&y) ` |
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+ | [ ` 位變 ` ] ( ../lib/js/位經.wy#L36 ) | ` ~x ` |
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