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SQL how to increase or decrease one for a int column in one command
...ndexes, you will not see a diff with the following SQL vs 1 statement.
IF (select top 1 * form x where PK=@ID)
Insert
else
update
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How can I parse a YAML file from a Linux shell script?
...ailable for solid multiline entry manipulation.
simple dotted notation to select sub-values (ie: subvalue.maintainer is a valid key).
access by index is provided to sequences (ie: subvalue.things.-1 is the last element of the subvalue.things sequence.)
access to all sequence/structs elements in on...
The order of elements in Dictionary
...r elements in key-order then they should to dict.Keys.OrderBy( k => k ).Select( k => dict[k] ) instead (at the cost of O(n) space and O( n log n ) time) for the OrderBy() (which will need to buffer the entire keys collection in an internal list).
– Dai
Oc...
How do I fix a merge conflict due to removal of a file in a branch?
...Rescan for changes in Git Gui (F5)
Notice that conflicting file is deleted
Select Stage Changed Files To Commit (Ctrl-I) from Commit menu
Enter a commit comment like "deleted conflicting file"
Commit (ctrl-enter)
Now if you restart the merge it will (hopefully) work.
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Linux下部署企业级邮件服务器(postfix + dovecot + extmail) - 开源 & Gith...
...er=extmail password=extmail
default_pass_scheme = CRYPT
password_query = SELECT username AS user,password AS password FROM mailbox WHERE username = '%u'
user_query = SELECT maildir, uidnumber AS uid, gidnumber AS gid FROM mailbox WHERE username = '%u'
启动dovecot
service dovecot start
...
String formatting in Python 3
...ith decimal integer format.
There are many others things you can do when selecting an argument (using named arguments instead of positional ones, accessing fields, etc) and many format options as well (padding the number, using thousands separators, showing sign or not, etc). Some other examples:
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Design patterns to avoid [closed]
...you end up with when you wish to use a single-type dispatch OO language to select the code to use based on the type of two (or more) different objects.
The classic example being that you have the intersection between two shapes, but there's an even simpler case that's often overlooked: comparing th...
Tuples( or arrays ) as Dictionary keys in C#
...sonId: 4, LocationId: 9, SubjectId: 10), "XYZ");
var personIds = dict.Keys.Select(k => k.PersonId).Distinct().ToList();
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Mocking member variables of a class using Mockito
...ave a database and this override will return a value so you do not need to select. Most recently I had a service bus that I did not want to actually process the message but wanted to ensure it received it. Thus, I set the private bus instance this way-Helpful?
– dave
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Finding all cycles in a directed graph
...
This answer is much better than the answer selected. I struggled for quite a while trying to figure out how to get all simple cycles from the strongly connected components. It turns out this is non-trivial. The paper by Johnson contains a great algorithm, but is a lit...