How to center absolutely positioned element in div?

How to center absolutely positioned element in div?

I need to place a div (with position:absolute;) element in the center of my window. But I am having problems doing so, because the width is unknown.I tried this. But it needs to be adjusted as the width is responsive..center { left: 50%;

How to avoid reverse engineering of an APK file?

How to avoid reverse engineering of an APK file?

I am developing a payment processing app for Android, and I want to prevent a hacker from accessing any resources, assets or source code from the APK file.If someone changes the .apk extension to .zip then they can unzip it and easily acces

How do I protect Python code?

How do I protect Python code?

I am developing a piece of software in Python that will be distributed to my employer's customers. My employer wants to limit the usage of the software with a time restricted license file.If we distribute the .py files or even .pyc files it

Why do regex constructors need to be double escaped?

Why do regex constructors need to be double escaped?

In the regex below, \s denotes a space character. I imagine the regex parser, is going through the string and sees \ and knows that the next character is special.But this is not the case as double escapes are required.Why is this?var res =

ORA-00979 not a group by expression

ORA-00979 not a group by expression

I am getting ORA-00979 with the following query:SELECT cr.review_sk, cr.cs_sk, cr.full_name,tolist(to_char(cf.fact_date, 'mm/dd/yyyy')) "appt",cs.cs_id, cr.tracking_numberfrom review cr, cs, fact cfwhere cr.cs_sk = cs.cs_skand UPPER(cs.cs_i

Converting ISO 8601-compliant String to java.util.Date

Converting ISO 8601-compliant String to java.util.Date

I am trying to convert an ISO 8601 formatted String to a java.util.Date. I found the pattern "yyyy-MM-dd'T'HH:mm:ssZ" to be ISO8601-compliant if used with a Locale (compare sample).However, using the java.text.SimpleDateFormat, I cannot con

Aren't promises just callbacks?

Aren't promises just callbacks?

I've been developing JavaScript for a few years and I don't understand the fuss about promises at all.It seems like all I do is change:api(function(result){ api2(function(result2){ api3(function(result3){ // do work

Why does comparing strings in Python using either '==' or 'is' sometimes produce

Why does comparing strings in Python using either '==' or 'is' sometimes produce

I've got a Python program where two variables are set to the value 'public'. In a conditional expression I have the comparison var1 is var2 which fails, but if I change it to var1 == var2 it returns True.Now if I open my Python interpreter

Efficiently convert rows to columns in sql server

Efficiently convert rows to columns in sql server

I'm looking for an efficient way to convert rows to columns in SQL server, I heard that PIVOT is not very fast, and I need to deal with lot of records.This is my example: ---------------------------- | Id | Value |ColumnName | -----

What are the nuances of scope prototypal / prototypical inheritance in AngularJS?

What are the nuances of scope prototypal / prototypical inheritance in AngularJS?

The API Reference Scope page says: A scope can inherit from a parent scope.The Developer Guide Scope page says: A scope (prototypically) inherits properties from its parent scope.So, does a child scope always prototypically inherit from i

Why do I need to use std::move in the initialization list of a move-constructor?

Why do I need to use std::move in the initialization list of a move-constructor?

Let's say I have a (trivial) class, which is move-constructible and move-assignable but not copy-constructable or copy-assignable:class movable{ public: explicit movable(int) {} movable(movable&&) {} movable& operator=(movable&&)

Unwanted double quotes in generated csv file

Unwanted double quotes in generated csv file

I have created a CSV file using the Java code below:String csv = rs.getString("UPLOAD_FOLDER_PATH")+".csv";CSVWriter writer = new CSVWriter(new FileWriter(csv));String [] filevalues = new String[filevaluesarray.size()];filevalues=filevalues

A custom ostream

A custom ostream

I need some guidance or pointers understanding how to implement a custom ostream. My requirements are:A class with a 'First, does it worth deriving from ostream? What do I get by deriving from ostream? What if my class simply implements few

How do you divide your project into applications in Django?

How do you divide your project into applications in Django?

I am not really sure how to divide my Django projects into applications.What things should I consider when laying out a Django project? 1:James Bennett has written a blog entry about this,Django tips: laying out an application, section "

Control Flow via Return vs. If/Else [closed]

Control Flow via Return vs. If/Else [closed]

Which one is better (implicit control flow via return or control flow via if) -- see below. Please explain what you see as advantage/disadvantage to either one. I like option A because it's less code. Flow via Return:public ActionResult Edi

Clearing require cache

Clearing require cache

I am trying to delete a module from cache as suggested here.In the documentation we read: require.cache Object Modules are cached in this object when they are required. By deleting a key value from this object, the next require w

“Flattening” a list of dictionaries

“Flattening” a list of dictionaries

So my aim is to go from:fruitColourMapping = [{'apple': 'red'}, {'banana': 'yellow'}]to finalMap = {'apple': 'red', 'banana': 'yellow'}A way I got is: from itertools import chain fruits = list(chain.from_iterable([d.keys() for d in fruitCo

Getting Nested Object Property Value Using Reflection

Getting Nested Object Property Value Using Reflection

I have the following two classes:public class Address{ public string AddressLine1 { get; set; } public string AddressLine2 { get; set; } public string City { get; set; } public string State { get; set; } public string Zip { g

TDD FIRST principle

TDD FIRST principle

I am not understanding how the TDD FIRST principle isn't being adhered to in the following code.These are my notes about the FIRST principle: Fast: run (subset of) tests quickly (since you'll be running them all the time) Independent: n

When to use target=“_self”

When to use target=“_self”

When does the _self frame target becomes useful or worth using it?Isn't it (always?) the default behavior? 1:The default can be changed by using the tag in the :In this case, you can use target="_self" on a link to override the target s

Using @ComponentScan or  with only one class

Using @ComponentScan or with only one class

I'm maintaining a project with two set of main packages, the project is using Spring and Spring MVC, one of these packages contains several controllers and is scanned using XML configuration ().The problem is that there is a single class in

'OR' operator in XPath predicate?

'OR' operator in XPath predicate?

What is the XPath expression to select elements with type="application/rss+xml" OR type="application/atom+xml" (RSS and Atom feeds)link[@rel='alternate'][@type='application/rss+xml'] selects RSS feedslink[@rel='alternate'][@type='applicati

How can I use a Swift enum as a Dictionary key? (Conforming to Equatable)

How can I use a Swift enum as a Dictionary key? (Conforming to Equatable)

I've defined an enum to represent a selection of a "station"; stations are defined by a unique positive integer, so I've created the following enum to allow negative values to represent special selections:enum StationSelector : Printable {

Lemmatizer in R or python (am, are, is -> be?) [closed]

Lemmatizer in R or python (am, are, is -> be?) [closed]

I'm not a [computational] linguistic, so please excuse my supper dummy-ness in this topic.According to Wikipedia, lemmatisation is defined as: Lemmatisation (or lemmatization) in linguistics, is the process of grouping together the differe

Angular.js closing with click anywhere but on the element

Angular.js closing with click anywhere but on the element

It's pretty common thing, like if you click on inbox here here on stackoverflow. I'll be calling that dialog or whatever gets opened a thing. Now there are two ways I know of to deal with this, you create an invisible overlay where only the