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import { moduleExts } from './constants.ts'
export default {  inDeno(): boolean {    return typeof Deno !== 'undefined' && this.isNEString(Deno.version?.deno)  },  isString(a: any): a is string {    return typeof a === 'string'  },  isNEString(a: any): a is string {    return typeof a === 'string' && a.length > 0  },  isArray(a: any): a is Array<any> {    return Array.isArray(a)  },  isNEArray(a: any): a is Array<any> {    return Array.isArray(a) && a.length > 0  },  isPlainObject(a: any): a is Record<string, any> {    return typeof a === 'object' && a !== null && !this.isArray(a) && Object.getPrototypeOf(a) == Object.prototype  },  isFunction(a: any): a is Function {    return typeof a === 'function'  },  isLikelyHttpURL(s: string): boolean {    const p = s.slice(0, 8).toLowerCase()    return p === 'https://' || p.slice(0, 7) === 'http://'  },  shortHash(hash: string): string {    return hash.slice(0, 9)  },  trimPrefix(s: string, prefix: string): string {    if (prefix !== '' && s.startsWith(prefix)) {      return s.slice(prefix.length)    }    return s  },  trimSuffix(s: string, suffix: string): string {    if (suffix !== '' && s.endsWith(suffix)) {      return s.slice(0, -suffix.length)    }    return s  },  trimModuleExt(url: string) {    for (const ext of moduleExts) {      if (url.endsWith('.' + ext)) {        return url.slice(0, -(ext.length + 1))      }    }    return url  },  ensureExt(s: string, ext: string): string {    if (s.endsWith(ext)) {      return s    }    return s + ext  },  splitBy(s: string, searchString: string): [string, string] {    const i = s.indexOf(searchString)    if (i >= 0) {      return [s.slice(0, i), s.slice(i + 1)]    }    return [s, '']  },  formatBytes(bytes: number) {    if (bytes < 1 << 10) {      return bytes.toString() + 'B'    }    if (bytes < 1 << 20) {      return Math.ceil(bytes / (1 << 10)) + 'KB'    }    if (bytes < 1 << 30) {      return this.trimSuffix((bytes / (1 << 20)).toFixed(1), '.0') + 'MB'    }    if (bytes < 1 << 40) {      return this.trimSuffix((bytes / (1 << 30)).toFixed(1), '.0') + 'GB'    }    if (bytes < 1 << 50) {      return this.trimSuffix((bytes / (1 << 40)).toFixed(1), '.0') + 'TB'    }    return this.trimSuffix((bytes / (1 << 50)).toFixed(1), '.0') + 'PB'  },  splitPath(path: string): string[] {    return path      .split(/[\/\\]+/g)      .map(p => p.trim())      .filter(p => p !== '' && p !== '.')      .reduce((path, p) => {        if (p === '..') {          path.pop()        } else {          path.push(p)        }        return path      }, [] as Array<string>)  },  cleanPath(path: string): string {    return '/' + this.splitPath(path).join('/')  },  debounce<T extends Function>(callback: T, delay: number): T {    let timer: number | null = null    return ((...args: any[]) => {      if (timer != null) {        clearTimeout(timer)      }      timer = setTimeout(() => {        timer = null        callback(...args)      }, delay)    }) as any  },  debounceX(id: string, callback: () => void, delay: number) {    const self = this as any    const timers: Map<string, number> = self.__debounce_timers || (self.__debounce_timers = new Map())    if (timers.has(id)) {      clearTimeout(timers.get(id)!)    }    timers.set(id, setTimeout(() => {      timers.delete(id)      callback()    }, delay))  }}