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What does iterator->second mean?
...a std::pair containing the key and its associated value.
std::map<std::string, int> m = /* fill it */;
auto it = m.begin();
Here, if you now do *it, you will get the the std::pair for the first element in the map.
Now the type std::pair gives you access to its elements through two members:...
What is the difference between t.belongs_to and t.references in rails?
...
column("#{col}_id", :integer, options)
column("#{col}_type", :string, polymorphic.is_a?(Hash) ? polymorphic : options) unless polymorphic.nil?
end
end
alias :belongs_to :references
This is just a way of making your code more readable -- it's nice to be able to put belongs_to i...
$http get parameters does not work
...l its properties are null or undefined, nothing will be added to the query string.
– nfang
Jan 22 '16 at 4:36
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Require returns an empty object
...nly one way - to add it dynamically, i guess. Or passing a model name as a string. Thanks for your response!
– user3677173
May 26 '14 at 17:57
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MongoDB relationships: embed or reference?
...n I rote this in 2011 twitter was still tied to text messages and Ruby 1.4 strings; in other words still ASCII chars only.
– John F. Miller
Sep 8 '17 at 18:52
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Wolfram's Rule 34 in XKCD [closed]
...n a cellular automaton (CA) that follows rule 2, then whenever a three-bit string matches rule 2's configuration, the center bit becomes (or stays, in this case) true on the next iteration.
A CA's rules are described as a bitstring. Say it's rule 110 (my favorite). In binary, 110 is 01101110. The d...
Difference between res.send and res.json in Express.js
...on spaces', 2);
app.set('json replacer', replacer);
And passed to a JSON.stringify() like so:
JSON.stringify(value, replacer, spacing);
// value: object to format
// replacer: rules for transforming properties encountered during stringifying
// spacing: the number of spaces for indentation
This...
Parallel.ForEach() vs. foreach(IEnumerable.AsParallel())
...e correct way to use AsParallel() in your example would be
IEnumerable<string> items = ...
items.AsParallel().ForAll(item =>
{
//Do parallel stuff here
});
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Python: Get relative path from comparing two absolute paths
... part, you can just do
>>> ''.join(lson[len(lparent):])
It's a string, but you can of course use it as a constructor of an other Path object.
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Using curl to upload POST data with files
...for the named form field should be loaded from a file path. Without it the string argument itself is passed through.
– jimp
Jul 18 '18 at 4:55
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