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append interview questions

Top append frequently asked interview questions

jQuery: Add element after another element

I have a certain textbox and I want to add a div after it. I've tried the .append() function, but that only adds the div in the element.

For example, I have:

<input type="text" id="bla" />

and I want to change that into:

<input type="text" id="bla" /><div id="space"></div>

Source: (StackOverflow)

In CoffeeScript how do you append a value to an Array?

What is the prescribed way to append a value to an Array in CoffeeScript? I've checked the PragProg CoffeeScript book but it only discusses creating, slicing and splicing, and iterating, but not appending.


Source: (StackOverflow)

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jQuery using append with effects

How can I use .append() with effects like show('slow')

Having effects on append doesn't seem to work at all, and it give the same result as normal show(). No transitions, no animations.

How can I append one div to another, and have a slideDown or show('slow') effect on it?


Source: (StackOverflow)

The prefered way of creating a new element with jQuery

I've got 2 ways I can create a <div> using jQuery.

Either:

var div = $("<div></div>");
$("#box").append(div);

Or:

$("#box").append("<div></div>");

What are the drawbacks of using second way other than re-usability?


Source: (StackOverflow)

What is the syntax to insert one list into another list in python?

Given two lists:

x = [1,2,3]
y = [4,5,6]

What is the syntax to:

  1. Insert x into y such that y now looks like [1, 2, 3, [4, 5, 6]]?
  2. Insert all the items of x into y such that y now looks like [1, 2, 3, 4, 5, 6]?

Source: (StackOverflow)

Appending to array

How do I append to an array in JavaScript?


Source: (StackOverflow)

Python - append vs. extend

What's the difference between the list methods append() and extend()?


Source: (StackOverflow)

How can I concatenate string variables in Bash?

In PHP I would add strings together like this:

$foo = "Hello";
$foo .= " World";

So $foo would be "Hello World"

How would I do that in Bash?


Source: (StackOverflow)

Creating a div element in jQuery

How do I create a div element in jQuery?


Source: (StackOverflow)

How do you append to a file in Python?

How do you append to the file instead of overwriting it? Is there a special function that appends to the file?


Source: (StackOverflow)

How do I concatenate or merge arrays in Swift?

If there are two arrays created in swift like this:

var a:[CGFloat] = [1, 2, 3]
var b:[CGFloat] = [4, 5, 6]

How can they be merged to [1, 2, 3, 4, 5, 6]?


Source: (StackOverflow)

Adding dictionaries together, Python [duplicate]

This question already has an answer here:

I have two dictionaries and I'd like to be able to make them one:

Something like this pseudo-Python would be nice:

dic0 = {'dic0': 0}
dic1 = {'dic1': 1}

ndic = dic0 + dic1
# ndic would equal {'dic0': 0, 'dic1': 1}

Source: (StackOverflow)

bash append file contents to the bottom of existing file [duplicate]

Possible Duplicate:
Shell script to append text to each file?
How to append output to the end of text file in SHELL Script?

I'm trying to work out the best way to insert api details into a pre-existing config. I thought about using sed to insert the contents of the api text file to the bottom of the config.inc file. I've started the script but it doesn't work and it wipes the file.

#!/bin/bash

CONFIG=/home/user/config.inc
API=/home/user/api.txt

sed -e "\$a $API" > $CONFIG

What am I doing wrong?


Source: (StackOverflow)

What is the idiomatic way to prepend to a vector in Clojure?

Prepending to a list is easy:

user=> (conj '(:bar :baz) :foo)
(:foo :bar :baz)

Appending to a vector is easy:

user=> (conj [:bar :baz] :foo) 
[:bar :baz :foo]

How do I (idiomatically) prepend to a vector, while getting back a vector? This does not work as it returns a seq, not a vector:

user=> (cons :foo [:bar :baz])     
(:foo :bar :baz)

This is ugly (IMVHO):

user=> (apply vector (cons :foo [:bar :baz])) 
[:foo :bar :baz]

Note: I basically just want a datastructure that I can append and prepend to. Appending to large lists should have a large performance penalty, so I thought of vectors..


Source: (StackOverflow)

Python append() vs. + operator on lists, why do these give different results?

Why do these two operations (append() resp. +) give different results?

>>> c = [1, 2, 3]
>>> c
[1, 2, 3]
>>> c += c
>>> c
[1, 2, 3, 1, 2, 3]
>>> c = [1, 2, 3]
>>> c.append(c)
>>> c
[1, 2, 3, [...]]
>>> 

In the last case there's actually an infinite recursion. c[-1] and c are the same. Why is it different with the + operation?


Source: (StackOverflow)