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How to sum up elements of a C++ vector?
...tor.begin(); it != vector.end(); ++it)
sum_of_elems += *it;
Using a standard algorithm:
#include <numeric>
sum_of_elems = std::accumulate(vector.begin(), vector.end(), 0);
Important Note: The last argument's type is used not just for the initial value, but for the type of the resu...
jQuery Popup Bubble/Tooltip [closed]
...ng to make a "bubble" that can popup when the onmouseover event is fired and will stay open as long as the mouse is over the item that threw the onmouseover event OR if the mouse is moved into the bubble. My bubble will need to have all manners of HTML and styling including hyperlinks, images, e...
How to export/import PuTTy sessions list?
...Path("Desktop") + "\putty.reg")
Import
Double-click on the *.reg file and accept the import.
Alternative ways:
cmd.exe, require elevated command prompt:
regedit /i putty-sessions.reg
regedit /i putty.reg
PowerShell:
reg import putty-sessions.reg
reg import putty.reg
Note: do not repla...
Requirejs why and when to use shim config
...D, but you need to manage their dependencies. For example, in the Backbone and Underscore example above: you know that Backbone requires Underscore, so suppose you wrote your code like this:
require(['underscore', 'backbone']
, function( Underscore, Backbone ) {
// do something with Backbone
...
How to find my Subversion server version number?
... of the subversion REPOSITORY you can:
Look to the repository on the web and on the bottom of the page it will say something like:
"Powered by Subversion version 1.5.2 (r32768)."
From the command line: <insert curl, grep oneliner here>
If not displayed, view source of the page
<svn ver...
How to split a long regular expression into multiple lines in JavaScript?
...
You could convert it to a string and create the expression by calling new RegExp():
var myRE = new RegExp (['^(([^<>()[\]\\.,;:\\s@\"]+(\\.[^<>(),[\]\\.,;:\\s@\"]+)*)',
'|(\\".+\\"))@((\\[[0-9]{1,3}\\.[0-9]{1,3}\\.[0-9]{1...
Convert base-2 binary number string to int
...
You use the built-in int function, and pass it the base of the input number, i.e. 2 for a binary number:
>>> int('11111111', 2)
255
Here is documentation for python2, and for python3.
...
SQL query to group by day
I want to list all sales, and group the sum by day.
8 Answers
8
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How do I add a foreign key to an existing SQLite table?
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SQLite doesn't support the ADD CONSTRAINT variant of the ALTER TABLE command (sqlite.org: SQL Features That SQLite Does Not Implement).
Therefore, the only way to add a foreign key in sqlite 3.6.1 is during CREATE TABLE as follows:
CREATE TABLE child (
id INTEGER PRIMARY KEY,
...
What is better: @SuppressLint or @TargetApi?
I have issues in my app regarding StrictMode and added the code snippet that basically disables the StrictModeHelper . However, Lint complains about setThreadPolicy() now and proposes to either add
...