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SQL Server: What is the difference between CROSS JOIN and FULL OUTER JOIN?
...ery's where clause, and in cases where the on condition can't be satisfied for those rows it puts null values in for the unpopulated fields.
This wikipedia article explains the various types of joins with examples of output given a sample set of tables.
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Sort array of objects by single key with date value
...really similar question here: Simple function to sort an array of objects
For that question I created this little function that might do what you want:
function sortByKey(array, key) {
return array.sort(function(a, b) {
var x = a[key]; var y = b[key];
return ((x < y) ? -1 : ...
Best approach to converting Boolean object to string in java
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I don't think there would be any significant performance difference between them, but I would prefer the 1st way.
If you have a Boolean reference, Boolean.toString(boolean) will throw NullPointerException if your reference is null. As the reference is unboxed to boolean b...
How to properly create composite primary keys - MYSQL
...rement surrogate primary keys as the ID. info is a table that contains information about both table_1 and table_2 .
8 ...
Catch All Bugs with BugTrap! - 开源 & Github - 清泛网移动版 - 专注C/C++及内核技术
...ements - Tons of features/options added since last update. See app history for details
Introduction
Some time ago, I was working on a multi-tier application with quite complex logic. The application was handling medical information, and it was important to correctly synchronize data under all ...
schema builder laravel migrations unique on two columns
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+1 thanks for this...not sure how I missed it in the documentation. I must be blind :P
– OACDesigns
Nov 29 '13 at 20:17
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Print a string as hex bytes?
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Your can transform your string to a int generator, apply hex formatting for each element and intercalate with separator:
>>> s = "Hello world !!"
>>> ":".join("{:02x}".format(ord(c)) for c in s)
'48:65:6c:6c:6f:20:77:6f:...
Select random row from a sqlite table
...ible to seed the random number. e.g. Book of the day seeded with unix epoc for today at noon so it shows the same book all day even if the query is run multiple times. Yes I know caching is more efficient for this use case just an example.
– danielson317
Apr 22...
How to delete the last n commits on Github and locally?
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Can you generalize this for last n number of commits?
– user_19
Apr 29 '14 at 0:39
6
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Change priorityQueue to max priorityqueue
... The comparator like (x, y) -> y - x may be not appropriate for long integers due to overflow. For example, numbers y = Integer.MIN_VALUE and x = 5 results in positive number. It is better to use new PriorityQueue<>((x, y) -> Integer.compare(y, x)). Though, the better solut...