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Why doesn't Dijkstra's algorithm work for negative weight edges?
...int on positive numbers - the above assumption is not true.
Since we do "know" each vertex which was "closed" is minimal - we can safely do the relaxation step - without "looking back". If we do need to "look back" - Bellman-Ford offers a recursive-like (DP) solution of doing so.
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Do you (really) write exception safe code? [closed]
...sure your code is exception safe. But then, you strive for it, using well-known patterns, and avoiding well-known anti-patterns.
Do you know and/or actually use alternatives that work?
There are no viable alternatives in C++ (i.e. you'll need to revert back to C and avoid C++ libraries, as well as...
Change key pair for ec2 instance
...ould do the trick for #5. And don't forget step 13. is probably rm ~/.ssh/known_hosts on boxes you've been connecting from.
– brandonscript
Apr 9 '14 at 6:38
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How can I overwrite a getter method in an ActiveRecord model?
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Well. I just saw the doco. Now if I call name on the model object, which one will be called -name_with_override or name_without_override ?
– Arup Rakshit
May 19 '15 at 9:29
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Android emulator: How to monitor network traffic?
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I've found the emulators I use already now have tcpdump installed, and the command #1 works without installing one. You can also run it with "adb -e shell tcpdump -s0 -w /sdcard/emulator.cap".
– Les
Mar 21 '17 at 12:43
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Spinlock versus Semaphore
... few threads are contending for the lock at the same time. Of course every now and then two threads will try to acquire the lock at the same time (if this couldn't happen you wouldn't need a lock!), but this is rather the exception than the rule in a "healthy" system.
In such a case, a spinlock g...
How to disable scrolling in UITableView table when the content fits on the screen
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Thank you! This is mostly working for me now. Only problem I'm having now is when cells are partially visible they still count as visible and thus scrolling gets disabled when in that case I want it to be enabled.
– Ginny
Sep ...
node.js remove file
...s.exists. Because according to the latest node.js documentation, fs.exists now deprecated.
For example:-
fs.stat('./server/upload/my.csv', function (err, stats) {
console.log(stats);//here we got all information of file in stats variable
if (err) {
return console.error(err);
}
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Global and local variables in R
...d since it is not defined in this environment
get('var', envir=test.env) # now it can be found
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What killed my process and why?
...y. So in theory, your CPU has access to total of 1.5GB of virtual memory.
Now, for some time everything is running fine within 1.5GB of total memory. But all of sudden (or gradually) your system has started consuming more and more memory and it reached at a point around 95% of total memory used.
N...