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How to check for file lock? [duplicate]
...very next second (read: short timespan).
Why specifically do you need to know if the file is locked anyway? Knowing that might give us some other way of giving you good advice.
If your code would look like this:
if not locked then
open and update file
Then between the two lines, another pro...
What uses are there for “placement new”?
...he lifetime of the original char objects by re-using their storage. If you now call delete[] buf the dynamic type of the object(s) pointed to no longer matches their static type so you have undefined behaviour. It is more consistent to use operator new/operator delete to allocate raw memory inteded ...
In Objective-C why should I check if self = [super init] is not nil?
... not hell bent on not following best practices. I would, however, like to know why they are best practises in the first place. Its like being told to jump off a tower. You don't just go ahead and do it unless you know why. Is there a big, soft pillow to land on at the bottom, with a massive cash rew...
Change text color based on brightness of the covered background area?
I've thought about the following for a while already, so now I want to know your opinions, possible solutions, and so on.
8...
Best way to store a key=>value array in JavaScript?
...e you asked about how to loop through a key value array you would want to know how to get an object (key=>value array) like the person object above to have, let's say, more than one person.
Well, now that we know javascript arrays are used typically for numeric indexing and objects more flexibly...
Two way sync with rsync
I have a folder a/ and a remote folder A/.
I now run something like this on a Makefile:
10 Answers
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jQuery pass more parameters into callback
...lue1, value2);
}
This calls the callback and supplies a single argument. Now you want to supply an additional argument, so you wrap the callback in closure.
callbackReceiver(callback); // "Hello World", undefined
callbackReceiver(function(value) {
callback(value, "Foo Bar"); // "Hello Wor...
When to use Amazon Cloudfront or S3
...ront also supports CORS as of 2014 (thanks sergiopantoja).
* Note: S3 can now automatically replicate to additional regions as of 2015.
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How do I create a list of random numbers without duplicates?
...f r not in answer:
answerSize += 1
answer.add(r)
# answer now contains 10 unique, random integers from 0.. 100
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What is the runtime performance cost of a Docker container?
...en you can expect a minor hit in latency, as shown below. However, you can now use the host network stack (e.g., docker run --net=host) when launching a Docker container, which will perform identically to the Native column (as shown in the Redis latency results lower down).
They also ran latency...