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When is std::weak_ptr useful?
...it, what is wrong with the cache holding a shared_ptr and just removing it from its list when it should be cleared from memory? Any users will hold a shared_ptr all the same and the cached resource will be cleared as soon as all users are done with it.
– rubenvb
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Cannot push to GitHub - keeps saying need merge
...This worked for me for a repo that I have on Github but, I had a submodule from Heroku within my app. and I had to bring the files out of the submodule and then push the updated app to Heroku.
– JGallardo
Nov 14 '13 at 22:37
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How can I use a local image as the base image with a dockerfile?
I'm working on a dockerfile.
I just realised that I've been using FROM with indexed images all along.
4 Answers
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With arrays, why is it the case that a[5] == 5[a]?
...he first element of the array. a[5] is the value that's 5 elements further from a, which is the same as *(a + 5), and from elementary school math we know those are equal (addition is commutative).
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What algorithms compute directions from point A to point B on a map?
...s work, with a couple of modifications:
Instead of doing Dijkstra's once from source to dest, you start at each end, and expand both sides until they meet in the middle. This eliminates roughly half the work (2*pi*(r/2)^2 vs pi*r^2).
To avoid exploring the back-alleys of every city between your so...
“CAUTION: provisional headers are shown” in Chrome debugger
... You see this message in the debugger whenever the resource was retrieved from the browser's cache without asking the server if the content has changed.
– Maor
Jun 5 '14 at 8:48
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How to create streams from string in Node.Js?
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From node 10.17, stream.Readable have a from method to easily create streams from any iterable (which includes array literals):
const { Readable } = require("stream")
const readable = Readable.from(["input string"])
readab...
What is Bootstrap?
...s" provided in the answer above. Copy/pasting the definition of Bootstrap from their website is obviously useless given that the user who posted the question clearly mentioned having looked at the bootstrap website. I don't think that seeing the same text from their website would make more sense si...
What is the purpose of shuffling and sorting phase in the reducer in Map Reduce Programming?
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First of all shuffling is the process of transfering data from the mappers to the reducers, so I think it is obvious that it is necessary for the reducers, since otherwise, they wouldn't be able to have any input (or input from every mapper). Shuffling can start even before the map ...
How serious is this new ASP.NET security vulnerability and how can I workaround it?
...tionally add a random time sleep in the error page to prevent the attacker from timing the responses for added attack information.
In web.config
<configuration>
<location allowOverride="false">
<system.web>
<customErrors mode="On" defaultRedirect="~/error.html" />
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