1,map()//杩斿洖涓€涓柊鐨勬暟缁刢onstlist=[1,2,3,4];list.map((el)=>el*2);//[2,4,6,8]2,filter()//杩斿洖涓€涓柊鏁扮粍constlist=[1,2,3,4];list.filter((el)=>el%2===0);//[2,4]3.reduce()//灏嗘暟缁勭缉鍑忎负鍗曚釜鍊硷紝鍑芥暟杩斿洖鐨勫€煎瓨鍏ョ疮鍔犲櫒constlist=[1,2,3,4,5];list.reduce((鎬昏,椤圭洰)=>鎬昏+椤圭洰,0);//154銆乺educeRight()//瀵规暟缁勭殑姣忎釜鍏冪礌鎵ц涓€涓猺educer鍑芥暟锛岀敓鎴愪竴涓緭鍑哄€硷紙浠庡彸鍒板乏锛塩onstlist=[1,2,3,4,5];list.reduceRight((鎬昏,椤圭洰)=>鎬昏+椤圭洰,0);//155,fill()//鐢ㄩ潤鎬佸€煎～鍏呮暟缁勪腑鐨勫厓绱燾onstlist=[1,2,3,4,5];鍒楄〃.濉厖锛?锛夛紱//[0,0,0,0,0]6,find()//杩斿洖鏁扮粍涓涓€涓弧瓒虫彁渚涚殑娴嬭瘯鍑芥暟鐨勫厓绱犵殑鍊硷紝鍚﹀垯杩斿洖undefinedconstlist=[1,2,3,4,5];list.find((el)=>el===3);//3list.find((el)=>el===6);//undefined7,indexOf()//杩斿洖缁欏畾鍏冪礌鍦ㄦ暟缁勪腑鐨勭涓€涓储寮曪紝濡傛灉涓嶅瓨鍦ㄥ垯杩斿洖-1constlist=[1,2,3,4,5];鍒楄〃銆傛寚鏁帮紙3锛夛紱//2list.indexOf(6);//-18,lastIndexOf()//杩斿洖缁欏畾鍏冪礌鍦ㄦ暟缁勪腑鐨勬渶鍚庝竴涓储寮曪紝濡傛灉涓嶅瓨鍦ㄥ垯杩斿洖-1銆備粠fromIndexconstlist=[1,2,3,4,5]鍚戝悗鎼滅储鏁扮粍锛沴ist.lastIndexOf(3);//2list.lastIndexOf(3,1);//-19,findIndex()//杩斿洖婊¤冻鎻愪緵鐨勬祴璇曞嚱鏁扮殑鏁扮粍涓涓€涓厓绱犵殑绱㈠紩銆傚惁鍒欒繑鍥?1constarray=[5,12,8,130,44];array.findIndex((鍏冪礌)=>鍏冪礌>13);//310,includes()//濡傛灉鏁扮粍涓瓨鍦ㄧ粰瀹氬厓绱狅紝鍒欒繑鍥瀟rueconstlist=[1,2,3,4,5];list.includes(3);//truelist.includes(6);//false11,pop()//鍒犻櫎骞惰繑鍥炴暟缁勫厓绱犵殑鏈€鍚庝竴涓猚onstlist=[1,2,3,4,5];鍒楄〃.pop();//5鍒楄〃锛?/[1,2,3,4]12,push()//鍚戞暟缁勬湯灏炬坊鍔犱竴涓垨澶氫釜鍏冪礌锛屽苟杩斿洖鏂扮殑闀垮害銆傚父閲忓垪琛?[1,2,3,4,5];鍒楄〃.鎺ㄩ€侊紙6锛夛紱//6鍒楄〃锛?/[1,2,3,4,5,6]13銆乻hift()//鍒犻櫎骞惰繑鍥炴暟缁勭殑绗竴涓厓绱犮€傚父閲忓垪琛?[1,2,3,4,5];鍒楄〃.shift();//1鍒楄〃锛?/[2,3,4,5]14,unshift()//娣诲姞涓€涓垨澶氫釜鍏冪礌锛屽苟杩斿洖鏂扮殑闀垮害銆傚父閲忓垪琛?[1,2,3,4,5];鍒楄〃.unshift(0);//6鍒楄〃锛?/[0,1,2,3,4,5]15銆乻plice()//閫氳繃鍒犻櫎瑕佷箞鏇挎崲鐜版湁鍏冪礌锛岃涔堝湪鍘熷湴娣诲姞鏂板厓绱犳潵鏀瑰彉鏁扮粍鐨勫唴瀹广€傚父閲忓垪琛?[1,2,3,4,5];list.splice(1,2);//[2,3]鍒楄〃锛?/[1,4,5]16銆乻lice()//灏嗘暟缁勭殑涓€閮ㄥ垎娴呮嫹璐濊繑鍥炲埌浠庡ご鍒板熬锛堜笉鍖呮嫭灏撅級閫夋嫨鐨勬柊鏁扮粍瀵硅薄涓紝涓嶄慨鏀瑰師鏁扮粍銆傚父閲忓垪琛?[1,2,3,4,5];鍒楄〃銆傚垏鐗囷紙1銆?锛夛紱//[2,3]鍒楄〃锛?/[1,2,3,4,5]17,join()//灏嗘暟缁勭殑鎵€鏈夊厓绱犳嫾鎺ユ垚涓€涓瓧绗︿覆銆傚父閲忓垪琛?[1,2,3,4,5];list.join(',');//"1,2,3,4,5"18銆乺everse()//杩欎釜鏁扮粍鍙互鍙嶈浆鏁扮粍涓厓绱犵殑椤哄簭銆傚父閲忓垪琛?[1,2,3,4,5];鍒楄〃.reverse();//[5,4,3,2,1]鍒楄〃锛?/[5,4,3,2,1]19,sort()//瀵规暟缁勫厓绱犺繘琛屽師浣嶆帓搴忥紝杩斿洖鏁扮粍銆俢onstarray=['D','B','A','C'];array.sort();//馃榾['A','B','C','D']//ORconstarray=[4,1,3,2,10];array.sort();//馃槯[1,10,2,3,4]array.sort((a,b)=>a-b);//馃榾[1,2,3,4,10]20,some()//濡傛灉鏁扮粍涓嚦灏戞湁涓€涓厓绱犻€氳繃浜嗙敱鎻愪緵鐨勫嚱鏁板疄鐜扮殑娴嬭瘯锛屽垯杩斿洖true銆傚父閲忓垪琛?[1,2,3,4,5];list.some((el)=>el===3);//truelist.some((el)=>el===6);//false21,every()//濡傛灉鏁扮粍涓殑鎵€鏈夊厓绱犻兘閫氳繃鎻愪緵鐨勫嚱鏁板疄鐜扮殑娴嬭瘯锛屽垯杩斿洖true銆傚父閲忓垪琛?[1,2,3,4,5];list.every((el)=>el===3);//鍋囧父閲忓垪琛?[2,4,6,8,10];鍒楄〃銆傛瘡涓?(el)=>el%2===0);//true22,from()//浠庣被鏁扮粍鎴栧彲杩唬瀵硅薄鍒涘缓涓€涓柊鏁扮粍銆俢onstlist='12345'Array.from(list);//['1','2','3','4','5']23,of()//浣跨敤鍙彉鏁伴噺鐨勫弬鏁板垱寤轰竴涓柊鏁扮粍锛屾棤璁哄弬鏁扮殑鏁伴噺鎴栫被鍨嬪浣曘€俢onstlist=Array.of(1,2,3,4,5);鍒楄〃;//[1,2,3,4,5]24,isArray()//濡傛灉缁欏畾鐨勫€间负鏁扮粍锛屽垯杩斿洖true銆侫rray.isArray([1,2,3,4,5]);//trueArray.isArray(5);//false25,at()//杩斿洖鎸囧畾绱㈠紩澶勭殑鍊笺€傚父閲忓垪琛?[1,2,3,4,5];鍒楄〃锛?锛夛紱//2list.at(-1);//5list.at(-2);//4//璇存槑锛歫s涓嶆敮鎸佽礋绱㈠紩鐨勬柟寮忋€備絾鏄痚s6澧炲姞浜嗕竴涓猘t鏂规硶锛屽彲浠ヨ幏鍙栨暟缁勬寚瀹氱储寮曠殑鍏冪礌锛屽苟涓旀敮鎸佽礋绱㈠紩銆傝礋鏁扮储寮曚粠鍚庡線鍓嶈绠楋紝-1琛ㄧず鏈€鍚庝竴浣嶏紝-2琛ㄧず鍊掓暟绗簩浣嶏紝浠ユ绫绘帹26銆乧opyWithin()//澶嶅埗鏁扮粍涓殑鏁扮粍鍏冪礌锛岃繑鍥炰慨鏀瑰悗鐨勬柊鏁扮粍銆傚父閲忓垪琛?[1,2,3,4,5];list.copyWithin(0,3,4);//[4,2,3,4,5]//璇存槑锛氱涓€涓弬鏁版槸寮€濮嬪鍒跺厓绱犵殑鐩爣銆傜浜屼釜鍙傛暟鏄紑濮嬪鍒跺厓绱犵殑绱㈠紩銆傜涓変釜鍙傛暟鏄鍋滄澶嶅埗鐨勫厓绱犵殑绱㈠紩銆?7.flat()//杩斿洖涓€涓柊鏁扮粍锛屽叾涓墍鏈夊瓙鏁扮粍鍏冪礌閫掑綊杩炴帴鍒版寚瀹氭繁搴︺€傚父閲忓垪琛?[1,2,[3,4,[5,6]]];鍒楄〃銆傚钩鍧︼紙鏃犵┓澶э級锛?/[1,2,3,4,5,6]28,flatMap()//杩斿洖閫氳繃灏嗙粰瀹氱殑鍥炶皟鍑芥暟搴旂敤浜庢暟缁勭殑姣忎釜鍏冪礌鑰屽舰鎴愮殑鏂版暟缁勩€傚父閲忓垪琛?[1,2,3];list.flatMap((el)=>[el,el*el]);//[1,1,2,4,3,9]""鍚庣画杩唬
