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What is the best way to use a HashMap in C++?
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While the standard library does not have a hash table-based container, almost all implementations include hash_map from the SGI STL in some form or another.
– James McNellis
Aug 26 '10 at 18:27
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What is the most robust way to force a UIView to redraw?
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@RobNapier Note: This doesn't have anything to do with CALayer's display. It's just a custom public method in a UIView subclass, just like what is done in GLKView (another UIView subclass, and the only Apple-written one I know of that demands DRA...
What is the purpose of the -m switch?
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What this answer doesn't make it clear is this only works on the subset of modules that are executable i.e. have a __main__.py file. Most don't and will break e.g. python -m sys 'print(sys.version)' fails with python: No code object available...
Why were pandas merges in python faster than data.table merges in R in 2012?
...n data.table when the number of unique strings (levels) is large: 10,000.
Does Rprof() reveal most of the time spent in the call sortedmatch(levels(i[[lc]]), levels(x[[rc]])? This isn't really the join itself (the algorithm), but a preliminary step.
Recent efforts have gone into allowing characte...
Git for beginners: The definitive practical guide
...that it shows history in a linear fashion (a single branch at a time) - it doesn't visualise branching and merging, which can be important with git, although this is a planned improvement.
Download links, change log and screenshots | git repository
GitX
Intends to be a "gitk clone for OS X".
I...
Best practices for API versioning? [closed]
...anently to another URI (which should be a resource instance permalink that does not contain API version info). This status code can be used to indicate an obsolete/unsupported API version, informing API client that a versioned resource URI been replaced by a resource permalink.
302 Found indicating ...
What is the performance of Objects/Arrays in JavaScript? (specifically for Google V8)
...eads =O
Note: These metrics applies only to large array/objects which v8 does not "entirely optimise out". There can be very isolated optimised performance cases for array/object size less then an arbitrary size (24?). More details can be seen extensively across several google IO videos.
Note 2: ...
Difference between Role and GrantedAuthority in Spring Security
...ity 4 expects you to have the ROLE_ prefix whereas the hasAuthority('xyz') does not expect the prefix and evaluates exactly what is passed in. I used this solution, but was running into problems with hasRole('OP_MY_PERMISSION') since the ROLE_ prefix was needed. Instead, I should have been using t...
How to write WinForms code that auto-scales to system font and dpi settings?
Intro: There's a lot of comments out there that say "WinForms doesn't auto-scale to DPI/font settings well; switch to WPF." However, I think that is based on .NET 1.1; it appears they actually did a pretty good job of implementing auto-scaling in .NET 2.0. At least based on our research and testing...
How do you detect where two line segments intersect? [closed]
...orithm right, the concrete example he shows plugs in the wrong numbers and does calculations wrong. For example:
(4 * (4 - 1) + 12 * (7 - 1)) / (17 * 4 + 12 * 10)
= 844/0.88
= 0.44
That confused me for hours. :(
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