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How can I determine whether a 2D Point is within a Polygon?
...ard form: A*x + B*y + C = 0
// See: http://en.wikipedia.org/wiki/Linear_equation
a1 = v1y2 - v1y1;
b1 = v1x1 - v1x2;
c1 = (v1x2 * v1y1) - (v1x1 * v1y2);
// Every point (x,y), that solves the equation above, is on the line,
// every point that does not solve it, is not. The e...
How do you sign a Certificate Signing Request with your Certification Authority?
...############################################################
[ ca ]
default_ca = CA_default # The default ca section
[ CA_default ]
default_days = 1000 # How long to certify for
default_crl_days = 30 # How long before next CRL
default_md = sha256 # Use pub...
What is the standard naming convention for html/css ids and classes?
... while, I've gone back to dashes. To me now they look a lot cleaner than un_der_scores or camelCase. My original point still stands though: there isn't a standard.
Update 2015
An interesting corner case with conventions here is Rust. I really like the language, but the compiler will warn you if yo...
Is there a macro recorder for Eclipse? [closed]
...nd it works great. In order to make it work, then the file PracticallyMacro_0.4.9.jar needs to be put in the eclipse/downloads/plugins directory (create the plugins directory if it doesn't exist). You can edit macros by going to Windows/Preferences/Practically Macro Options and you can run the macro...
How to get JQuery.trigger('click'); to initiate a mouse click
...ed.
For example, I have some code that I want to be executed when #expense_tickets value is changed, and also, when page is reload
$(function() {
$("#expense_tickets").change(function() {
// code that I want to be executed when #expense_tickets value is changed, and also, when page is relo...
How to convert an entire MySQL database characterset and collation to UTF-8?
...ommands.
ALTER DATABASE databasename CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
ALTER TABLE tablename CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
Or if you're still on MySQL 5.5.2 or older which didn't support 4-byte UTF-8, use utf8 instead of utf8mb4:
ALTER DATABASE data...
Convert JSON string to dict using Python
...he vague nomenclature used. Here is what I wrote to combat this: def read_json(json_data): if (type(json_data) == str): return json.loads(json_data) elif (str(type(json_data)) == "<class '_io.TextIOWrapper'>"): return json.load(json_data) I'm sure this can be improv...
Why does the order in which libraries are linked sometimes cause errors in GCC?
...before one another: -la -lb -la.
Linking to dynamic libraries
$ export LD_LIBRARY_PATH=. # not needed if libs go to /usr/lib etc
$ g++ -fpic -shared d.cpp -o libd.so
$ g++ -fpic -shared b.cpp -L. -ld -o libb.so # specifies its dependency!
$ g++ -L. -lb a.cpp # wrong order (works on some distribut...
Add a CSS border on hover without moving the element [duplicate]
...ing when the thick border is applied. codepen
– aleph_one
Mar 18 at 18:36
add a comment
...
What does the @ symbol before a variable name mean in C#? [duplicate]
...name is recorded in the assembly as "class", vs. with an underscore it is "_class". Thus, if another .NET language doesn't define "class" as a reserved word, they could use the name just "class".
– P Daddy
Jan 9 '09 at 20:23
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