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How do you detect where two line segments intersect? [closed]
... can find t and u such that:
p + t r = q + u s
Cross both sides with s, getting
(p + t r) × s = (q + u s) × s
And since s × s = 0, this means
t (r × s) = (q − p) × s
And therefore, solving for t:
t = (q − p) × s / (r × s)
In the same way, we can solve for ...
How can I log the stdout of a process started by start-stop-daemon?
I am using an init script to run a simple process, which is started with:
11 Answers
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What is the best open XML parser for C++? [duplicate]
...r a simple, clean, correct XML parser to use in my C++ project. Should I write my own?
12 Answers
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Stopwatch vs. using System.DateTime.Now for timing events [duplicate]
...ine the precision and resolution of the Stopwatch timing implementation.
It uses a higher resolution / precision than DateTime.Now.
You can also check out these related links:
Environment.TickCount vs DateTime.Now
Is DateTime.Now the best way to measure a function's performance?
DateTime is go...
getApplication() vs. getApplicationContext()
...couldn't find a satisfying answer to this, so here we go: what's the deal with Activity/Service.getApplication() and Context.getApplicationContext() ?
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Diagnosing Memory Leaks - Allowed memory size of # bytes exhausted
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PHP doesn't have a garbage collector. It uses reference counting to manage memory. Thus, the most common source of memory leaks are cyclic references and global variables. If you use a framework, you'll have a lot of code to trawl through to find it, I'm afraid. ...
Laravel Check If Related Model Exists
...In php 7.2+ you can't use count on the relation object, so there's no one-fits-all method for all relations. Use query method instead as @tremby provided below:
$model->relation()->exists()
generic solution working on all the relation types (pre php 7.2):
if (count($model->relation))
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Copy a file in a sane, safe and efficient way
I search for a good way to copy a file (binary or text). I've written several samples, everyone works. But I want hear the opinion of seasoned programmers.
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Short description of the scoping rules?
...ese rules are specific to variable names, not attributes. If you reference it without a period, these rules apply.)
LEGB Rule
Local — Names assigned in any way within a function (def or lambda), and not declared global in that function
Enclosing-function — Names assigned in the local scope of...
How to disable GCC warnings for a few lines of code
In Visual C++, it's possible to use #pragma warning (disable: ...) . Also I found that in GCC you can override per file compiler flags . How can I do this for "next line", or with push/pop semantics around areas of code using GCC?
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