三元分配是否可以使用简写类型的三元分配表达 boolean x = false;
// ... code ...
a = x ? b : a; // Assigning a to a is pointless
a += x ? 1 : 0; // Adding 0 to a is pointless
我想沿着 a = x ? b; // Assign b to a if x is tru
默认值我有这样的: let queue = dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
dispatch_async(queue, {
if let data = NSURLConnection.sendSynchronousRequest(self.buildRequestForVenue
如何在ORACLE SQL中的PIVOT函数中将NULL替换为0? 这是我想要编写查询: SELECT *
FROM
(
SELECT DISTINCT
CUSTOMER_ID AS CUSTOMER_ID,
CASE
WHEN CATEGORY_CODE = '01' THEN 'CAT 01'
WHEN CATEGORY_CODE = '02'