判斷一個(gè)對象是否為Buffer對象
來源:程序員人生 發(fā)布時(shí)間:2016-07-01 08:12:07 閱讀次數(shù):3133次
1、問題背景
不同數(shù)據(jù)類型對象變量,如何判斷1個(gè)對象是不是為Buffer對象
2、實(shí)現(xiàn)源碼
> you='anikdjfijkfjkdsjfkdjfkdjfkdjfkdjfkd';
'anikdjfijkfjkdsjfkdjfkdjfkdjfkdjfkd'
> hai=Buffer(128);
<Buffer 90 a4 3d 00 00 00 00 00 c0 c5 3b 00 00 00 00 00 e0 93 3c 00 00 00 00 00
0a 00 00 00 00 00 00 00 08 94 3c 00 00 00 00 00 05 00 00 00 01 00 00 00 00 00 ..
. >
> typeof(you);
'string'
> typeof(hai);
'object'
> Buffer.isBuffer(you);
false
> Buffer.isBuffer(hai);
true
>
3、問題說明(1)you是1個(gè)字符串,利用isBuffer()方法判斷為false;
(2)hai是1個(gè)Buffer對象,利用isBuffer()方法判斷為true
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