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What is the difference between Strategy pattern and Dependency Injection?
Strategy pattern and Dependency Injection both allow us to set / inject objects at run time. What is the difference between Strategy pattern and Dependency Injection?
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Get ID of last inserted document in a mongoDB w/ Java driver
... initializeVersionProperty(objectToSave);
maybeEmitEvent(new BeforeConvertEvent<T>(objectToSave, collectionName));
DBObject dbDoc = toDbObject(objectToSave, writer);
maybeEmitEvent(new BeforeSaveEvent<T>(objectToSave, dbDoc, collectionName));
Object id = insertDBObj...
What are the basic rules and idioms for operator overloading?
... operators are merely syntactic sugar, their actual work could be done by (and often is forwarded to) plain functions. But it is important that you get this boiler-plate code right. If you fail, either your operator’s code won’t compile or your users’ code won’t compile or your users’ code...
How to concatenate two numbers in javascript?
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You can also use toString function to convert it to string and concatenate.
var a = 5;
var b = 6;
var value = a.toString() + b.toString();
How to echo or print an array in PHP?
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You can use print_r, var_dump and var_export funcations of php:
print_r: Convert into human readble form
<?php
echo "<pre>";
print_r($results);
echo "</pre>";
?>
var_dump(): will show you the type of the thing as well as what's in it.
var_dump($results);
foreach loop: usi...
Javascript - removing undefined fields from an object [duplicate]
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Guys, this might look simple, but date objects will be converted to string. Beware
– sowdri
Jun 12 '18 at 4:07
2
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Best introduction to C++ template metaprogramming? [closed]
...Mapping Integral Constants to Types", 2.6 "Type Selection", 2.7 "Detecting Convertibility and Inheritance at Compile Time", 2.9 "NullType and EmptyType" and 2.10 "Type Traits".
The best intermediate/advanced resource I've found is C++ Template Metaprogramming by David Abrahams and Aleksey Gurtovoy,...
What does the question mark operator mean in Ruby?
...ever there are several other uses of the ? in Ruby (is a ternary operator, converting a character to its ASCII integer, usage in test, in RegEx'es, etc.) many of which are covered in the other answers here.
– Karl Wilbur
Sep 11 '15 at 20:36
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What is RSS and VSZ in Linux memory management
What are RSS and VSZ in Linux memory management? In a multithreaded environment how can both of these can be managed and tracked?
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Removing nan values from an array
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TypeError: only integer scalar arrays can be converted to a scalar index
– towry
Jun 30 '18 at 14:29
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