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Does functional programming replace GoF design patterns?
Since I started learning F# and OCaml last year, I've read a huge number of articles which insist that design patterns (especially in Java) are workarounds for the missing features in imperative languages. One article I found makes a fairly strong claim :
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Convert a matrix to a 1 dimensional array
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Either read it in with 'scan', or just do as.vector() on the matrix. You might want to transpose the matrix first if you want it by rows or columns.
> m=matrix(1:12,3,4)
> m
[,1] [,2] [,3] [,4]
[1,] 1 4 7 10
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What are some popular naming conventions for Unit Tests? [closed]
..., who the hell cares? Only you and your team will see it, so long as it is readable, and clear about what the test is doing, carry on! :)
That said, I am still quite new to testing and blogging my adventures with it :)
shar...
What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
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I've read that clog also outputs to cerr. So based on that, which one do you choose? If clog is normally for "logging", why would I want that to go to the error stream? Logs seem more like "normal logs" (a.k.a. cout) than errors.
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When should I use a struct instead of a class?
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I am surprised I have not read at any of the previous answer this, which I consider the most crucial aspect :
I use structs when I want a type with no identity. For example a 3D point:
public struct ThreeDimensionalPoint
{
public readonly int X,...
Convert JSON string to dict using Python
...ke the vague nomenclature used. Here is what I wrote to combat this: def read_json(json_data): if (type(json_data) == str): return json.loads(json_data) elif (str(type(json_data)) == "<class '_io.TextIOWrapper'>"): return json.load(json_data) I'm sure this can be im...
What is a “slug” in Django?
When I read Django code I often see in models what is called a "slug". I am not quite sure what this is, but I do know it has something to do with URLs. How and when is this slug-thing supposed to be used?
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Generating CSV file for Excel, how to have a newline inside a value
...rrectly, and row structure is not damaged, and all national characters are read properly (they were trashed when reading without UTF8 BOM). Excel have not even displayed the text-import wizard. Currently, that CSV now has EFBBBF header, uses 0A as row separator, and 0D0A as new line inside strings i...
Can Retrofit with OKHttp use cache data when offline
... if (Utils.isNetworkAvailable(context)) {
int maxAge = 60; // read from cache for 1 minute
return originalResponse.newBuilder()
.header("Cache-Control", "public, max-age=" + maxAge)
.build();
} else {
int maxStale =...
How to write a UTF-8 file with Java?
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@Smarty only if you are already using Apache Commons. Otherwise it seems an awful waste to include yet another jar just because you don't want to write a few more characters.
– Jason
Jan 10 '14 at 1:03
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