Once for all, how to correctly save instance state of Fragments in back stack?

Once for all, how to correctly save instance state of Fragments in back stack?

I have found many instances of a similar question on SO but no answer unfortunately meets my requirements.I have different layouts for portrait and landscape and I am using back stack, which both prevents me from using setRetainState() and

Does Python support short-circuiting?

Does Python support short-circuiting?

Does Python support short-circuiting in boolean expressions? 1:Yep, both and and or operators short-circuit -- see the docs. 2:Short-circuiting behavior in operator and, or:Let's first define a useful function to determine if somethin

Subscript indices must either be real positive integers or logicals, generic solution

Subscript indices must either be real positive integers or logicals, generic solution

The following error occurs quite frequently: Subscript indices must either be real positive integers or logicalsI have found many questions about this but not one with a really generic answer. Hence I would like to have the general solutio

Why aren't variable-length arrays part of the C++ standard?

Why aren't variable-length arrays part of the C++ standard?

I haven't used C very much in the last few years. When I read this question today I came across some C syntax which I wasn't familiar with.Apparently in C99 the following syntax is valid:void foo(int n) { int values[n]; //Declare a varia

input() error - NameError: name '…' is not defined

input() error - NameError: name '…' is not defined

I am getting an error when I try to run this simple python script:input_variable = input ("Enter your name: ")print ("your name is" + input_variable)Lets say I type in "dude", the error I am getting is:line 1, in input_variable = in

How to check whether a string contains a substring in JavaScript?

How to check whether a string contains a substring in JavaScript?

Usually I would expect a String.contains() method, but there doesn't seem to be one. What is a reasonable way to check for this? 1:Here is a list of current possibilities:1. (ES6) includes—go to answervar string = "foo", substring = "

How to sum a variable by group?

How to sum a variable by group?

Let's say I have two columns of data. The first contains categories such as "First", "Second", "Third", etc. The second has numbers which represent the number of times I saw "First".For example:Category FrequencyFirst 10First

What is the explicit promise construction antipattern and how do I avoid it?

What is the explicit promise construction antipattern and how do I avoid it?

I was writing code that does something that looks like:Using the Promise constructor:function getStuffDone(param) { return new Promise(function(resolve, reject) { myPromiseFn(param+1) .then(function(val) { resolve(val);

Reference - What does this regex mean?

Reference - What does this regex mean?

What is this?This is a collection of common Q&A. This is also a Community Wiki, so everyone is invited to participate in maintaining it.Why is this?regex is suffering from give me ze code type of questions and poor answers with no explanati

Why is my variable unaltered after I modify it inside of a function? - Asynchronous code reference

Why is my variable unaltered after I modify it inside of a function? - Asynchronous code reference

Given the following examples, why is outerScopeVar undefined in all cases?var outerScopeVar;var img = document.createElement('img');img.onload = function() { outerScopeVar = this.width;};img.src = 'lolcat.png';alert(outerScopeVar);var ou

Generate random numbers replicating arbitrary distribution

Generate random numbers replicating arbitrary distribution

I have data wherein I have a variable z that contains around 4000 values (from 0.0 to 1.0) for which the histogram looks like this. Now I need to generate a random variable, call it random_z which should replicate the above distribution. Wh

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 "

What is the _REENTRANT flag?

What is the _REENTRANT flag?

which compiling a multithreaded program we use gcc like below:gcc -lpthread -D_REENTRANT -o someprogram someprogram.cwhat exactly is the flag -D_REENTRANT doing over here? 1:Defining _REENTRANT causes the compiler to use thread safe (i.e

Converting byte array to string and back again in C#

Converting byte array to string and back again in C#

So here's the deal: I'm trying to open a file (from bytes), convert it to a string so I can mess with some metadata in the header, convert it back to bytes, and save it. The problem I'm running into right now is with this code. When I compa

GDB: How to list all source files used for compilation

GDB: How to list all source files used for compilation

New to the project, have multiple source files used for compilation and some "could" be dynamic libraries, loaded at runtime. When debugging the executable using "GDB", is there a command to list all the source files (static) used to build

Pointer syntax in C: why does * only apply to the first variable?

Pointer syntax in C: why does * only apply to the first variable?

The following declaration in C:int* a, b;will declare a as type int* and b as type int. I'm well aware of this trap, but what I want to know is why it works this way. Why doesn't it also declare b as int*, as most people would intuitively e

Typescript Function Interface

Typescript Function Interface

Why doesn't Typescript warn me that the function I am defining does not match the interface declaration, but it does warn me if I try to invoke the function.interface IFormatter { (data: string, toUpper : boolean): string;};//Compiler do

Textmate autocompletion and class outline for PHP project [closed]

Textmate autocompletion and class outline for PHP project [closed]

I'm using PDT, but want to switch to any lightweit editor. First I want to try Textmate. Eclipse has several useful features:class outlile to get list of properties and methods (with signature) to navigate;type hierarchy, it is like class o

Linking C .obj files into Delphi application, resolving standard C dependencies

Linking C .obj files into Delphi application, resolving standard C dependencies

I compiled libxml2 with BCC 5.5 command line compiler, now I have lots of .obj files which I'd like to link into my Delphi application. Unfortunately, I get lots of "Unsatisfied forward or external declaration" errors, pointing to standard

How do I use X-editable on dynamic fields in a Meteor template now with Blaze?

How do I use X-editable on dynamic fields in a Meteor template now with Blaze?

I had x-editable working in Meteor 0.7.2 but since upgrading to 0.8.0 it no longer renders correctly. I tend to end up with a bunch of Empty tags. This is frustrating because the data is there, just not by the time the rendered function is

How to handle Message Boxes while using webbrowser in C#?

How to handle Message Boxes while using webbrowser in C#?

I'm using this webbrowswer feature of C#. Trying to log in a website through my application. Everything goes fine, except when a wrong ID or password is entered there's little message box (that is set on the webpage itself) which pops up an

Elegant solution to implement timeout for bash commands and functions

Elegant solution to implement timeout for bash commands and functions

I wrote a function to run commands, which takes two args 1st a command 2nd timeout in seconds:#! /bin/bashfunction run_cmd { cmd="$1"; timeout="$2" grep -qP "^\d+$" $exitfile) & start=$(date +%s) while true; do pid=$(job

uEye camera with python on Windows

uEye camera with python on Windows

I need to get a uEye camera working with python on Windows in order to take pictures and operate on the live stream.Since uEye cameras are widely spread industrial cameras I would have thought that there is a standard solution to this; howe

How to use a return value in another function in Javascript?

How to use a return value in another function in Javascript?

I'm self-teaching myself JavaScript and out of curiosity I'm wondering what is the proper way of returning a value from one function to be used in another function. For example:function firstFunction() { // do something; return somevalue

Using CurrentDomain.SetData(“APP_CONFIG_FILE”) doesn't work in PowerShell ISE

Using CurrentDomain.SetData(“APP_CONFIG_FILE”) doesn't work in PowerShell ISE

I'm attempting to use a .NET 4.0 assembly in PowerShell ISE, and trying to change the config file which is used via:[System.AppDomain]::CurrentDomain.SetData("APP_CONFIG_FILE", $PathToConfig); [Configuration.ConfigurationManager]::Connec