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Converting an int to std::string
...very time.
It is also very versatile, as it converts everything supported by operator<<(), even in combination.
Definition:
#include <sstream>
#define SSTR( x ) dynamic_cast< std::ostringstream & >( \
( std::ostringstream() << std::dec << x ) ).str()...
How to find index of all occurrences of element in array?
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You can write a simple readable solution to this by using both map and filter:
const nanoIndexes = Cars
.map((car, i) => car === 'Nano' ? i : -1)
.filter(index => index !== -1);
EDIT: If you don't need to support IE/Edge (or are transpiling your code), ES2019...
Ignore python multiple return value
... to use __ (double underscore) instead as a throwaway variable, as pointed by ncoghlan. E.g.:
x, __ = func()
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Merge two (or more) lists into one, in C# .NET
... specified category-Ids, you can treat your query as a projection followed by a flattening operation. There's a LINQ operator that does that: SelectMany.
// implicitly List<Product>
var products = new[] { CategoryId1, CategoryId2, CategoryId3 }
.SelectMany(id => GetAll...
Rails - How to use a Helper Inside a Controller
...pdated #{helpers.pluralize(count, 'record')}"
end
Source: From a comment by @Markus on a different answer. I felt his answer deserved it's own answer since it's the cleanest and easier solution.
Reference: https://github.com/rails/rails/pull/24866
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bundle install fails with SSL certificate verification error
... the best temporary solution is to
[...] use the non-ssl version of rubygems in your gemfile as a temporary workaround.
via user Ownatik
what they mean is at the top of the Gemfile in your rails application directory change
source 'https://rubygems.org'
to
source 'http://rubygems.org'
no...
htaccess Access-Control-Allow-Origin
...
if we match files by adding the filesmatch block, then what does the * do?
– shenkwen
Jun 21 '16 at 14:08
1
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What's the simplest way to test whether a number is a power of 2 in C++?
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Approach #1:
Divide number by 2 reclusively to check it.
Time complexity : O(log2n).
Approach #2:
Bitwise AND the number with its just previous number should be equal to ZERO.
Example: Number = 8
Binary of 8: 1 0 0 0
Binary of 7: 0 1 1 1 and the bi...
How to get instance variables in Python?
..." # instance variable
self.jj = "bar"
Class variables are shared by all instances of the class.
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Copy to clipboard in Node.js?
... It is better than "copy-paste" module as it supports double byte characters too. But this has issue with windows 32 bit OS.
– Ponmudi VN
Jul 19 '17 at 7:53
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