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How to implement classic sorting algorithms in modern C++?
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+50
Algorithmic building blocks
We begin by assembling the algorithmic building blocks from the Standard Library:
#include <algorithm...
Simultaneously merge multiple data.frames in a list
....frame(i = c("c","d","a"), l = 7:9, stringsAsFactors=FALSE)
Update June 2018: I divided the answer in three sections representing three different ways to perform the merge. You probably want to use the purrr way if you are already using the tidyverse packages. For comparison purposes below, you'll...
How to get memory available or used in C#
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edited Apr 11 '18 at 8:03
Red Taz
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answered Ap...
How to stretch the background image to fill a div
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10 Answers
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Eclipse Workspaces: What for and why?
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edited Jun 20 at 9:12
Community♦
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answered Dec 23 '14 at 20:47
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Removing multiple files from a Git repo that have already been deleted from disk
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2310
For Git 1.x
$ git add -u
This tells git to automatically stage tracked files -- including del...
Show/hide 'div' using JavaScript
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440
How to show or hide an element:
In order to show or hide an element, manipulate the element's s...
reference assignment is atomic so why is Interlocked.Exchange(ref Object, Object) needed?
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answered Feb 3 '10 at 16:20
Eric LippertEric Lippert
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insert a NOT NULL column to an existing table
...lue for your column:
ALTER TABLE MY_TABLE ADD STAGE INT NOT NULL DEFAULT '0'
UPD: Please note that answer above contains GO which is a must when you run this code on Microsoft SQL server. If you want to perform the same operation on Oracle or MySQL you need to use semicolon ; like that:
ALTER ...
Is it good practice to NULL a pointer after deleting it?
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Setting a pointer to 0 (which is "null" in standard C++, the NULL define from C is somewhat different) avoids crashes on double deletes.
Consider the following:
Foo* foo = 0; // Sets the pointer to 0 (C++ NULL)
delete foo; // Won't do anything
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