杞澆鍒拌繖閲岋紝浠ヤ究嫻忚
鍘熸枃鍦板潃錛歨ttp://www.cnblogs.com/tishifu/archive/2007/08/03/841429.html
substr 鏂規硶
榪斿洖涓涓粠鎸囧畾浣嶇疆寮濮嬬殑鎸囧畾闀垮害鐨勫瓙瀛楃涓層?/p>
stringvar.substr(start [, length ])
鍙傛暟
stringvar
蹇呴夐」銆傝鎻愬彇瀛愬瓧絎︿覆鐨勫瓧絎︿覆鏂囧瓧鎴?String 瀵硅薄銆?/p>
start
蹇呴夐」銆傛墍闇鐨勫瓙瀛楃涓茬殑璧峰浣嶇疆銆傚瓧絎︿覆涓殑絎竴涓瓧絎︾殑绱㈠紩涓?0銆?/p>
length
鍙夐」銆傚湪榪斿洖鐨勫瓙瀛楃涓蹭腑搴斿寘鎷殑瀛楃涓暟銆?/p>
璇存槑
濡傛灉 length 涓?0 鎴栬礋鏁幫紝灝嗚繑鍥炰竴涓┖瀛楃涓層傚鏋滄病鏈夋寚瀹氳鍙傛暟錛屽垯瀛愬瓧絎︿覆灝嗗歡緇埌 stringvar 鐨勬渶鍚庛?/p>
紺轟緥
涓嬮潰鐨勭ず渚嬫紨紺轟簡substr 鏂規硶鐨勭敤娉曘?/p>
function SubstrDemo(){
var s, ss; // 澹版槑鍙橀噺銆?br />
var s = "The rain in Spain falls mainly in the plain.";
ss = s.substr(12, 5); // 鑾峰彇瀛愬瓧絎︿覆銆?br />
return(ss); // 榪斿洖 "Spain"銆?br />
}
substring 鏂規硶
榪斿洖浣嶄簬 String 瀵硅薄涓寚瀹氫綅緗殑瀛愬瓧絎︿覆銆?
strVariable.substring(start, end)
"String Literal".substring(start, end)
鍙傛暟
start
鎸囨槑瀛愬瓧絎︿覆鐨勮搗濮嬩綅緗紝璇ョ儲寮曚粠 0 寮濮嬭搗綆椼?/p>
end
鎸囨槑瀛愬瓧絎︿覆鐨勭粨鏉熶綅緗紝璇ョ儲寮曚粠 0 寮濮嬭搗綆椼?/p>
璇存槑
substring 鏂規硶灝嗚繑鍥炰竴涓寘鍚粠 start 鍒版渶鍚庯紙涓嶅寘鍚?end 錛夌殑瀛愬瓧絎︿覆鐨勫瓧絎︿覆銆?/p>
substring 鏂規硶浣跨敤 start 鍜?end 涓よ呬腑鐨勮緝灝忓間綔涓哄瓙瀛楃涓茬殑璧峰鐐廣備緥濡傦紝 strvar.substring(0, 3) 鍜?strvar.substring(3, 0) 灝嗚繑鍥炵浉鍚岀殑瀛愬瓧絎︿覆銆?
濡傛灉 start 鎴?end 涓?NaN 鎴栬呰礋鏁幫紝閭ｄ箞灝嗗叾鏇挎崲涓?銆?
瀛愬瓧絎︿覆鐨勯暱搴︾瓑浜?start 鍜?end 涔嬪樊鐨勭粷瀵瑰箋備緥濡傦紝鍦?strvar.substring(0, 3) 鍜?strvar.substring(3, 0) 榪斿洖鐨勫瓙瀛楃涓茬殑鐨勯暱搴︽槸 3銆?
紺轟緥
涓嬮潰鐨勭ず渚嬫紨紺轟簡 substring 鏂規硶鐨勭敤娉曘?/p>
function SubstringDemo(){
var ss; // 澹版槑鍙橀噺銆?br />
var s = "The rain in Spain falls mainly in the plain..";
ss = s.substring(12, 17); // 鍙栧瓙瀛楃涓層?br />
return(ss); // 榪斿洖瀛愬瓧絎︿覆銆?br />
}
]]>