How to concatenate two lists in Python?

How to concatenate two lists in Python?

How do I concatenate two lists in Python?Example:listone = [1, 2, 3]listtwo = [4, 5, 6]Expected outcome:>>> joinedlist[1, 2, 3, 4, 5, 6] 1:Python makes this ridiculously easy. You can use the + operator to combine them:listone = [1,2,3]l

Is there a cross-browser onload event when clicking the back button?

Is there a cross-browser onload event when clicking the back button?

For all major browsers (except IE), the JavaScript onload event doesn’t fire when the page loads as a result of a back button operation — it only fires when the page is first loaded.Can someone point me at some sample cross-browser code (Fi

Manipulating an Access database from Java without ODBC

Manipulating an Access database from Java without ODBC

I want to manipulate a Microsoft Access database (.accdb or .mdb file) from my Java project. I don't want to use the JDBC-ODBC Bridge and the Access ODBC driver from Microsoft because:the JDBC-ODBC Bridge has been removed from Java SE 8 and

Why use getters and setters/accessors? [closed]

Why use getters and setters/accessors? [closed]

What's the advantage of using getters and setters - that only get and set - instead of simply using public fields for those variables?If getters and setters are ever doing more than just the simple get/set, I can figure this one out very qu

Lemmatizing POS tagged words with NLTK?

Lemmatizing POS tagged words with NLTK?

I have POS tagged some words with nltk.pos_tag(), so they are given treebank tags. I would like to lemmatize these words using the known POS tags, but I am not sure how. I was looking at Wordnet lemmatizer, but I am not sure how to convert

Rails database boolean values

Rails database boolean values

Code first:create_table :users do |t| ... t.boolean :is_active, :default => true ...endNow, here is my issue - I am creating a rake task to import a LARGE number of records (10,000+). I've done extensive testing and benchmarking and dete

Change EF 6 Code Generation Strategy from T4

Change EF 6 Code Generation Strategy from T4

In the past I have successfully created edmx files. This was using EF5 and Visual Studio 2012. I have since upgraded to Visual Studio 2013 and EF6. The existing EF 5 code still works, but now I have a problem. I can create edmx files, and a

What is the synchronization cost of calling a synchronized method from a synchronized method?

What is the synchronization cost of calling a synchronized method from a synchronized method?

Is there any difference in performance between thissynchronized void x() { y();}synchronized void y() {}and thissynchronized void x() { y();}void y() {} 1:Yes, there is an additional performance cost, unless and until the JVM inlin

how to get current tabId from background page

how to get current tabId from background page

how to get current tabId from background page?current tabId is the tab that user can see its content.background.html 1:getSelected has been deprecated. The new way to do it is:chrome.tabs.query( {currentWindow: true, active : true},

R writing style - require vs. ::

R writing style - require vs. ::

OK, we're all familiar with double colon operator in R. Whenever I'm about to write some function, I use require(), but I was always thinking about using :: instead. Using require in custom functions is better practice than library, since r

Calling NSString method on a String in Swift

Calling NSString method on a String in Swift

Apple's Swift documentation states that If you are working with the Foundation framework in Cocoa or Cocoa Touch, the entire NSString API is available to call on any String value you createIf I have a String object egvar newString: String

How to encrypt/decrypt an integer in PHP

How to encrypt/decrypt an integer in PHP

is there any way to make 2 way encryption/decryption for an integer (or string)Please note that I am not looking for encodingi need something like this crypting (100) 24694 crypting (101) 9564jh4 or 45216 or gvhjdfT or whatever ...

Passing rvalue reference to const lvalue reference paremeter

Passing rvalue reference to const lvalue reference paremeter

I am trying to understand C++11 rvalue references and how to use them for optimal performance in my code.Let's say we have a class A that has a member pointer to a large amount of dynamically allocated data.Furthermore, a method foo(const A

cron git push with ssh key

cron git push with ssh key

I setup a ssh key for github account, so I don't have to enter the password every time, it works fine. Here is the script I use:#!/bin/bashgit push origin masterBut when I use cron to run it, it will not use my ssh key. Here is the output:P

SQL sum by year report, looking for an elegant solution

SQL sum by year report, looking for an elegant solution

I have a table with 3 columns: ItemCode, Quantity and DocDate.I would like to create the following report in a more "elegant" way:SELECT T0.ItemCode, (SELECT SUM(QUANTITY) FROM MyTable T1 WHERE YEAR(T0.DocDate) = 2011 AND T0.ItemCode

UIApplicationBackgroundRefreshStatusDidChangeNotification usage without corresponding delegate metho

UIApplicationBackgroundRefreshStatusDidChangeNotification usage without corresponding delegate metho

I feel that UIApplicationBackgroundRefreshStatusDidChangeNotification introduced in iOS 7 is of little use without supporting UIApplication delegate method. Because, the app is not notified when user has switch ON the background refresh sta

How I separate logic from presentation?

How I separate logic from presentation?

Normally I am developing website and coding PHP and HTML something like this - while (mysqli_stmt_fetch($stmt)) { // Create Table Body $html .= "\n"; $html .= " $title\n"; $html .= " $date";

Upload Images to Amazon S3 using Django

Upload Images to Amazon S3 using Django

I'm currently resizing images on the fly when a user uploads a picture. The original picture is stored on Amazon S3 in a bucket called djangobucket. Inside this bucket, contains thousands of folders. Each folder is named after the user. I d

Operate on pairs of rows of a data frame

Operate on pairs of rows of a data frame

I've got a data frame in R, and I'd like to perform a calculation on all pairs of rows. Is there a simpler way to do this than using a nested for loop?To make this concrete, consider a data frame with ten rows, and I want to calculate the d

R- converting data from fraction to decimal [duplicate]

R- converting data from fraction to decimal [duplicate]

This question already has an answer here: How to perform arithmetic on values and operators expressed as strings? 1 answer Is there a simple way to con

What can service workers do that web workers cannot?

What can service workers do that web workers cannot?

What can service workers do that web workers cannot? Or vice versa?It seems that web workers are a subset of the functionality of service workers. Is this correct? 1:There is a big difference in what they are intended for:Web Workers We

How to get a list of all child nodes in a TreeView in .NET

How to get a list of all child nodes in a TreeView in .NET

I have a TreeView control in my WinForms .NET application that has multiple levels of childnodes that have childnodes with more childnodes, with no defined depth. When a user selects any parent node (not necessarily at the root level), how

How to resume JavaScript timer on iOS8 web app after screen unlock?

How to resume JavaScript timer on iOS8 web app after screen unlock?

On iOS8 this HTML5 web app does not resume the js timer after the screen is locked and then unlocked if the webapp was active AND launched from the homescreen icon. On iOS7 the timer would continue in this situation. I need the timer to c

Entity framework performance issue, saveChanges is very slow

Entity framework performance issue, saveChanges is very slow

Recently, I am doing some simple EF work. Very simple,first, List books = entity.Books.WHERE(c=>c.processed==false)ToList(); then foreach(var book in books) { //DoSomelogic, update some properties, book.ISBN = "ISBN

Execute web worker from different origin

Execute web worker from different origin

I am developing a library which I want to host on a CDN. The library is going to be used on many different domains across multiple servers. The library itself contains one script (let's call it script.js for now) which loads a web worker (w