39 lines
796 B
TypeScript
39 lines
796 B
TypeScript
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/** 判断两个值是否相等 */
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export function equaln(v1: number, v2: number, fuzz = 1e-5)
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{
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return Math.abs(v1 - v2) <= fuzz
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}
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/** 修正数组索引号 */
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export function FixIndex(index: number, arr: Array<any> | number)
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{
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let count = (Array.isArray(arr)) ? arr.length : arr
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if (index < 0)
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return count + index
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else if (index >= count)
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return index - count
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else
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return index
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}
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/**
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* 获取数组最大元素的索引号
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* @param compart t2大于t1返回t2
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* @returns 索引
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*/
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export function Max<T>(arr: T[], compart: (t1: T, t2: T) => boolean): number
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{
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let best: T = arr[0]
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let bestIndex = 0
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for (let i = 1; i < arr.length; i++)
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{
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let t1 = arr[i]
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if (compart(best, t1))
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{
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best = t1
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bestIndex = i
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}
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}
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return bestIndex
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}
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