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How do you detect where two line segments intersect? [closed]
...f r × s = 0 and (q − p) × r ≠ 0, then the two lines are parallel and non-intersecting.
If r × s ≠ 0 and 0 ≤ t ≤ 1 and 0 ≤ u ≤ 1, the two line segments meet at the point p + t r = q + u s.
Otherwise, the two line segments are not parallel but do not intersect....
sqlite3-ruby install error on Ubuntu
I have the following error during sqlite3-ruby install:
19 Answers
19
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Convert String to double in Java
...or everything: double total = Double.parseDouble(jlbTotal.getText().replaceAll("[^0-9.]", "")); - this basically replaces all characters that aren't a number or . to nothing, leaving only the number and decimal point to be parsed.
– WhiteFang34
Apr 24 '11 at 10...
IntelliJ IDEA shows errors when using Spring's @Autowired annotation
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But what if you actually forget to annotate a bean. You won't get any warning?
– Cleankod
Nov 22 '15 at 15:56
add a comm...
Altering column size in SQL Server
...right attribute.
IF COLUMNPROPERTY(OBJECT_ID('Employee', 'U'), 'Salary', 'AllowsNull')=0
ALTER TABLE [Employee]
ALTER COLUMN [Salary] NUMERIC(22,5) NOT NULL
ELSE
ALTER TABLE [Employee]
ALTER COLUMN [Salary] NUMERIC(22,5) NULL
...
Simplest way to do a fire and forget method in c# 4.0
I really like this question:
4 Answers
4
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How do I move the turtle in LOGO? [closed]
...
Logo is all about moving the turtle... you give it commands like this:
Forward 100
Right 45
You can do stuff like repeating commands too:
Repeat 8 [Forward 100 Right 45] ; Draw an octagon
(What do I win? 8-)
...
Good open source django project for learning [closed]
...lar projects is directly on GitHub: https://github.com/search?q=django
Finally:
Awesome Django @ https://github.com/wsvincent/awesome-django
Awesome Python @ https://github.com/vinta/awesome-python
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Batch script to delete files
...re onto your desktop.
if you want to remove an entire folder like an uninstaller program you could use this.
cd C:\Users\User\Detsktop\
rd /s /q SOFTWARE
this will delete the entire folder called software and all of its files and subfolders
Make Sure You Delete The Correct Folder Cause This Does...
微博为什么限制140字(附短信70字限制考) - 闲聊区 - 清泛IT社区，为创新赋能！
...sage. We reserve 20 characters for people’s names, and the other 140 are all yours! (via Twitter FAQ)也就是说，twitter希望微博首先能做到“微”，言简意赅，其次这样的限制是考虑到短信更新状态的字数限制，本身是160字母的限制，再留20字给id长度...