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Javascript reduce on array of objects
...etter Type Inference
--When using a tool like Typescript or an editor like VS Code, you get the benefit of telling the compiler the initial and it can catch errors if you're doing it wrong. If you don't set the initial value, in many situations it might not be able to guess and you could end up with...
What is the Invariant Culture?
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as for an example - https://msdn.microsoft.com/en-us/library/4c5zdc6a(v=vs.100).aspx. When you write out an app-specific file which the user shouldn't be messing around with, you should use InvariantCulture for all methods that take in a culture parameter.
Note that per the docs linked above:
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“Debug only” code that should run only when “turned on”
...g in a release build. As the variable exists solely to be toggled from the VS execution host, and in a release build its value doesn't matter, it's pretty harmless.
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Using an RDBMS as event sourcing storage
..., timestamps gave us insight into the order in which events were persisted vs raised. That gave us some assistance on a particularly heavily event driven system that raised vast quantities of events, giving us information about the performance of things like networks and the systems distribution acr...
How to sort a dataframe by multiple column(s)
...uartile, dot is the median)
Given these results and weighing simplicity vs. speed, I'd have to give the nod to arrange in the plyr package. It has a simple syntax and yet is almost as speedy as the base R commands with their convoluted machinations. Typically brilliant Hadley Wickham work. My ...
How to implement an STL-style iterator and avoid common pitfalls?
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I really don't get the cplusplus vs cppreference dispute, they are both good and missing many things. However, C++ is the only language where implementing standard library iterators is an hell XD. Most times is simpler writing a wrapper class over an stl con...
When to use reinterpret_cast?
I am little confused with the applicability of reinterpret_cast vs static_cast . From what I have read the general rules are to use static cast when the types can be interpreted at compile time hence the word static . This is the cast the C++ compiler uses internally for implicit casts also.
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C# Events and Thread Safety
...es down to just two and a half NANOSECONDS(!!!) per event raised (pre-init vs. classic-null). This would be undetectable in almost apps with real work to do, but given that the vast majority of event usage is in GUI frameworks, you'd have to compare this with the cost of repainting parts of a screen...
What is the difference/usage of homebrew, macports or other package installation tools? [closed]
...e detail:
This site suggests using Hombrew: http://deephill.com/macports-vs-homebrew/
whereas this site lists the advantages of using Macports: http://arstechnica.com/civis/viewtopic.php?f=19&t=1207907
I also switched from Ubuntu recently, and I enjoy using homebrew (it's simple and easy to ...
Array or List in Java. Which is faster?
...r call on my machine), there is very little overhead of using an ArrayList vs. an array for any non-intensive use. There are however a few things to keep in mind:
resizing operations on a list (when calling list.add(...)) are costly and one should try to set the initial capacity at an adequate leve...