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Negative weights using Dijkstra's Algorithm
...neral. For example, consider this graph:
Assume the edges are directed from left to right as in your example,
Your algorithm will work as follows:
First, you set d(A) to zero and the other distances to infinity.
You then expand out node A, setting d(B) to 1, d(C) to zero, and d(D) to 99.
Nex...
Define css class in django Forms
...can create a custom filter "addcss" in "my_app/templatetags/myfilters.py"
from django import template
register = template.Library()
@register.filter(name='addcss')
def addcss(value, arg):
css_classes = value.field.widget.attrs.get('class', '').split(' ')
if css_classes and arg not in css_...
socket.io and session?
I'm using express framework. I want to reach session data from socket.io. I tried express dynamicHelpers with client.listener.server.dynamicViewHelpers data, but i can't get session data. Is there a simple way to do this? Please see the code
...
async/await - when to return a Task vs void?
...
I meant f instead of g in my comment. The exception from f is passed to the SynchronizationContext. g will raise UnobservedTaskException, but UTE no longer crashes the process if it's not handled. There are some situations where it's acceptable to have "asynchronous exceptions...
Using -performSelector: vs. just calling the method
...wning a background thread, and for calling back results to the main thread from said background thread.
– PeyloW
Sep 30 '09 at 8:36
2
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Choose Git merge strategy for specific files (“ours”, “mine”, “theirs”)
...kout --ours -- <paths>
# or
git checkout --theirs -- <paths>
From the git checkout docs
git checkout [-f|--ours|--theirs|-m|--conflict=<style>] [<tree-ish>] [--] <paths>...
--ours
--theirs
When checking out paths from the index, check out stage #2 (ours...
Adding n hours to a date in Java?
...usHours( 8 )
Or…
myJavaUtilDate.toInstant() // Convert from legacy class to modern class, an `Instant`, a point on the timeline in UTC with resolution of nanoseconds.
.plus( // Do the math, adding a span of time to our moment, our `Instant`.
...
How to Calculate Execution Time of a Code Snippet in C++
...Time;
uint64 ret = li.QuadPart;
ret -= 116444736000000000LL; /* Convert from file time to UNIX epoch time. */
ret /= 10000; /* From 100 nano seconds (10^-7) to 1 millisecond (10^-3) intervals */
return ret;
#else
/* Linux */
struct timeval tv;
gettimeofday(&tv, NULL);
uint64 ret = tv...
C# naming convention for constants?
... cOns3 = 3;
public static readonly int CONS4 = 4;
}
// Call constants from anywhere
// Since the class has a unique and recognizable name, Upper Case might lose its charm
private void DoSomething(){
var getCons1 = Constant.Cons1;
var getCons2 = Constant.coNs2;
var getCons3 = Constant.cOns3;
var...
NSString property: copy or retain?
...ht work for your own strings, but you never know about strings you receive from frameworks.
– Nikolai Ruhe
May 27 '10 at 12:18
7
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