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Can a program depend on a library during compilation but not runtime?
...st a certain API, making it a compile-time dependency, but then at runtime include an implementation that also includes the API.
There may be fringe cases where the project requires a certain dependency to compile but then the corresponding code is not actually needed, but these will be rare.
On t...
LEFT OUTER joins in Rails 3
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You can do with this with includes as documented in the Rails guide:
Post.includes(:comments).where(comments: {visible: true})
Results in:
SELECT "posts"."id" AS t0_r0, ...
"comments"."updated_at" AS t1_r5
FROM "posts" LEFT OUTER JOIN "comm...
How do I (or can I) SELECT DISTINCT on multiple columns?
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How do I read an entire file into a std::string in C++?
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Use
#include <iostream>
#include <sstream>
#include <fstream>
int main()
{
std::ifstream input("file.txt");
std::stringstream sstr;
while(input >> sstr.rdbuf());
std::cout << sstr.str() <...
'uint32_t' identifier not found error
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You can #include <cstdint>. It's part of C++-standard since 2011.
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Check if an array contains any element of another array in JavaScript
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Vanilla JS
ES2016:
const found = arr1.some(r=> arr2.includes(r))
ES6:
const found = arr1.some(r=> arr2.indexOf(r) >= 0)
How it works
some(..) checks each element of the array against a test function and returns true if any element of the array passes the test funct...
Struggling with NSNumberFormatter in Swift for currency
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Get the current script file name
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When you want your include to know what file it is in (ie. what script name was actually requested), use:
basename($_SERVER["SCRIPT_FILENAME"], '.php')
Because when you are writing to a file you usually know its name.
Edit: As noted by Alec...
multiprocessing.Pool: When to use apply, apply_async or map?
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