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What is the difference between “Rollback…” and “Back Out Submitted Changelist #####” in Perforce P4V
...en made to any of those files, Perforce will tell you that those files are now out of date. You will have to sync to the head revision and then resolve the differences. This way you don't inadvertently clobber any changes that you actually want to keep.
Both operations work by essentially submitt...
Retain cycle on `self` with blocks
...choose this as the correct answer to your question. If not, please let me know how I can answer your question better.
– Lily Ballard
Dec 4 '10 at 8:24
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PUT vs. POST in REST
...x++ is not idempotent.
By this argument, PUT is for creating when you know the URL of the thing you will create. POST can be used to create when you know the URL of the "factory" or manager for the category of things you want to create.
so:
POST /expense-report
or:
PUT /expense-report/10...
What's the difference between backtracking and depth first search?
...implementation is termed as DFS, the latter kind is called Backtracking.
Now you see, if you’re working with high level languages, most likely you’re actually using Backtracking in the guise of DFS. Moreover, keeping track of visited nodes for a very large problem set could be really memory in...
Read an Excel file directly from a R script
...
And now there is readxl:
The readxl package makes it easy to get data out of Excel and into R.
Compared to the existing packages (e.g. gdata, xlsx, xlsReadWrite etc)
readxl has no external dependencies so it's easy to ins...
Can an enum class be converted to the underlying type?
...
I think you can use std::underlying_type to know the underlying type, and then use cast:
#include <type_traits> //for std::underlying_type
typedef std::underlying_type<my_fields>::type utype;
utype a = static_cast<utype>(my_fields::field);
With th...
How to delete an old/unused Data Model Version in Xcode
...al 8". For me it appeared on two separate lines. I removed these lines and now it's completely removed from Xcode.
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How many socket connections can a web server handle?
...xy requests through to some backend service(s), in which case the "server" now becomes a "client" and may well have to worry about ephemeral port exhaustion (eg: nginx.com/blog/overcoming-ephemeral-port-exhaustion-nginx-plus). I'm sure you know that, but mentioning it for others (:
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Flask vs webapp2 for Google App Engine
...d borrowed a lot from Flask and others (web.py, Tornado), but -- and, you know, I'm biased -- the above webapp2 benefits should be taken into account.
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Things possible in IntelliJ that aren't possible in Eclipse?
...nfiguration right when you edit it, so I do not need to restart server to know that I misspelled class name, or added constructor parameter so my Spring cfg is invalid.
Last time I tried, I could not run Eclipse on Windows XP x64.
and it will suggest you person.name or person.address.
Ctrl-click o...