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What is the purpose of static keyword in array parameter of function like “char s[static 10]”?
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The first declaration tells the compiler that someArray is at least 100 elements long. This can be used for optimizations. For example, it also means that someArray is never NULL.
Note that the C Standard does not require the compiler to diagnose when a call to the function...
How to search in array of object in mongodb
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$elemMatch allows you to match more than one component within the same array element.
Without $elemMatch mongo will look for users with National Medal in some year and some award in 1975s, but not for users with National Medal in 1975.
See MongoDB $elemMatch Documentation for more info. See Re...
How do I bind to list of checkbox values with AngularJS?
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There are two ways to approach this problem. Either use a simple array or an array of objects. Each solution has it pros and cons. Below you'll find one for each case.
With a simple array as input data
The HTML could look like:
<label ng-repeat="fruitName in fruits">
<input...
What does map(&:name) mean in Ruby?
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Another cool shorthand, unknown to many, is
array.each(&method(:foo))
which is a shorthand for
array.each { |element| foo(element) }
By calling method(:foo) we took a Method object from self that represents its foo method, and used the & to signify that i...
Manipulate a url string by adding GET parameters
...query'
parse_str($url_parts['query'], $params);
} else {
$params = array();
}
$params['category'] = 2; // Overwrite if exists
$params['tags'][] = 'cool'; // Allows multiple values
// Note that this will url_encode all values
$url_parts['query'] = http_build_query($params);
// If you ...
Ruby Arrays: select(), collect(), and map()
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It looks like details is an array of hashes. So item inside of your block will be the whole hash. Therefore, to check the :qty key, you'd do something like the following:
details.select{ |item| item[:qty] != "" }
That will give you all items where th...
Why use non-member begin and end functions in C++11?
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How do you call .begin() and .end() on a C-array ?
Free-functions allow for more generic programming because they can be added afterwards, on a data-structure you cannot alter.
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What's the fastest way to do a bulk insert into Postgres?
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UNNEST function with arrays can be used along with multirow VALUES syntax. I'm think that this method is slower than using COPY but it is useful to me in work with psycopg and python (python list passed to cursor.execute becomes pg ARRAY):
INSER...
How do you do a deep copy of an object in .NET? [duplicate]
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using System.Collections.Generic;
using System.Reflection;
using System.ArrayExtensions;
namespace System
{
public static class ObjectExtensions
{
private static readonly MethodInfo CloneMethod = typeof(Object).GetMethod("MemberwiseClone", BindingFlags.NonPublic | BindingFlags.In...
Ruby combining an array into one string
In Ruby is there a way to combine all array elements into one string?
3 Answers
3
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