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Correct use of transactions in SQL Server
..._ABORT ON -- Turns on rollback if T-SQL statement raises a run-time error.
SELECT * FROM T; -- Check before.
BEGIN TRAN
INSERT INTO T VALUES ('A');
INSERT INTO T VALUES ('B');
INSERT INTO T VALUES ('B');
INSERT INTO T VALUES ('C');
COMMIT TRAN
SELECT * FROM T; -- Check after.
DELETE ...
JSON formatter in C#?
...merable.Repeat(INDENT_STRING, --indentation)) + ch : ch.ToString()
select lineBreak == null
? openChar.Length > 1
? openChar
: closeChar
: lineBreak;
return String.Concat(result);
}
Output...
Is there a rule-of-thumb for how to divide a dataset into training and validation sets?
...o training and validation (again, 80/20 is a fair split).
Subsample random selections of your training data, train the classifier with this, and record the performance on the validation set
Try a series of runs with different amounts of training data: randomly sample 20% of it, say, 10 times and obs...
How to split last commit into two in Git
...do and unstage all of the changes from the last commit:
git reset HEAD^
Selectively stage the first round of changes:
git add -p
Commit:
git commit
Commit the rest of the changes:
git commit -a
(In either step, if you undid a commit that added a brand new file and want to add this to the...
How do I get the difference between two Dates in JavaScript?
... a time frame. I want to automatically fill in the end date when the user selects or changes the start date. I can't quite figure out, however, how to get the difference between the two times, and then how to create a new end Date using that difference.
...
Where can I locate themes for VS2012
... in another machine and at first it did not work. It turned out that I had selected the key name from this response by double clicking it, then copied it, then pasted it in regedit. Well, by doing so I had inadvertently created the key with a trailing space in the name! And hence it did not work.
S...
What does tree-ish mean in Git?
...e one that should be used for most of git commands.
More info in Revision Selection in the Git book.
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Haskell Type vs Data Constructor
...to consider the difference between a concrete type (examples include Int, [Char] and Maybe Bool) which is a type that can be assigned to a value in your program, and a type constructor function which you need to feed a type to be able to be assigned to a value. A value can never be of type "list", b...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...q_connect (s, "tcp://192.168.0.111:5555");
/* Message routing */
const char data [] = "ABC";
zmq_send (s, data, sizeof (data), 0);
区分拓扑建立和消息路由严格地说不是不可缺少的。毕竟，混合这两个为一个单独的函数是很容易的：
zmq_send (s, "tcp://19...
ZMQ: 基本原理 - 开源 & Github - 清泛网 - 专注C/C++及内核技术
...q_connect (s, "tcp://192.168.0.111:5555");
/* Message routing */
const char data [] = "ABC";
zmq_send (s, data, sizeof (data), 0);
区分拓扑建立和消息路由严格地说不是不可缺少的。毕竟，混合这两个为一个单独的函数是很容易的：
zmq_send (s, "tcp://19...