JavaScript中的或運算

 

Expression	Result
true || true	true
true || false	true
false || true	true
false || false	false
1 || 1	1
1 || 0	1
0 || 1	1
0 || 0	0
true || 1	true
1 || true	1
true || 0	true
false || 0	0
0 || false	false
false || 1	1
1 || false	1
null || null	null
null || false	false
false || null	null
null || true	true
true || null	true
null || 0	0
0 || null	null
null || 1	1
1 || null	1
undefined || undefined	undefined
undefined || true	true
true || undefined	true
undefined || false	false
false || undefined	undefined
undefined || null	null
null || undefined	undefined
undefined || 1	1
1 || undefined	1
undefined || 0	0
0 || undefined	undefined

 

代碼：http://files.cnblogs.com/owen-zhang/JavaScript_Or.rar