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Combined area of overlapping circles
...d four circles (midpoints and radius) and had to calculate the area of the union of these circles.
14 Answers
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Create a list from two object lists with linq
...
This can easily be done by using the Linq extension method Union. For example:
var mergedList = list1.Union(list2).ToList();
This will return a List in which the two lists are merged and doubles are removed. If you don't specify a comparer in the Union extension method like in my ...
Interfacing with structs and anonymous unions with c2hs
...e;
monome_event_type_t event_type;
/* __extension__ for anonymous unions in gcc */
__extension__ union {
struct me_grid {
unsigned int x;
unsigned int y;
} grid;
struct me_encoder {
unsigned int number;
int delta;
...
What is the difference between “INNER JOIN” and “OUTER JOIN”?
...Venn diagram intersection.
An outer join of A and B gives the results of A union B, i.e. the outer parts of a Venn diagram union.
Examples
Suppose you have two tables, with a single column each, and data as follows:
A B
- -
1 3
2 4
3 5
4 6
Note that (1,2) are unique to A, (3,...
T-SQL: Deleting all duplicate rows but keeping one [duplicate]
...g. the following is valid select min(id) from ( select newid() as id union select newid() as id ) as a
– iCodeSometime
Nov 15 '18 at 22:41
...
MySQL SELECT only not null values
...g it though...
SELECT val1 AS val
FROM your_table
WHERE val1 IS NOT NULL
UNION ALL
SELECT val2
FROM your_table
WHERE val2 IS NOT NULL
/*And so on for all your columns*/
The disadvantage of the above is that it scans the table multiple times once for each column. That may possibly be avoided by...
/usr/include/c++/4.9/bits/stl_iterator_base_types.h:165:53: error: ‘i...
..._iterator_base_types.h:165:53: error: ‘int’ is not a class, struct, or union type先看下面的代码(来自:SO)：#include <iostream>#include <cmath>#include <vector>using namespace std;double distance(int a, in...先看下面的代码(来自: SO)：
#include <iostream>
#include <cmath>
#...
Oracle nvarchar和varchar相互转换、联合查询 - 数据库(内核) - 清泛网 - ...
...racle nvarchar和varchar相互转换、联合查询场景：联合查询（union all）Oracle两张表，同一组字段的数据类型不一致，分别是nvarchar和varchar。这时联合查询报错如下：ora12704：字...场景：联合查询（union all）Oracle两张表，同一组字段的...
Can you create nested WITH clauses for Common Table Expressions?
...:
WITH y
AS
(
SELECT x, y, z
FROM MyTable
WHERE [base_condition]
UNION ALL
SELECT x, y, z
FROM MyTable M
INNER JOIN y ON M.[some_other_condition] = y.[some_other_condition]
)
SELECT *
FROM y
You may not need this functionality. I've done the following just to organize my queries ...
How to use Git properly with Xcode?
...add this line to a .gitattributes file:
*.pbxproj text -crlf -diff -merge=union
Then git will always take both sides of a merge for the .pbxproject files, having the same effect as the script I provided only without any extra work.
Lastly, here is my complete .gitignore file, showing what I do h...