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Can anybody explain how does foldr work? Take these examples: Prelude> foldr (-) 54 [10, 11] 53 ... about these executions. Any suggestions? See Question&Answers more detail:os...

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postgresql - Postgis installation: type "geometry" does not exist

I am trying to create table with Postgis. I do it by this page. But when I import postgis.sql file, I get a ... anybody know how can I fix it? See Question&Answers more detail:os...

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git - How to point Go module dependency in go.mod to a latest commit in a repo?

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javascript - FileReader vs. window.URL.createObjectURL

I'm building a mobile website and I'd like to use the Camera API to take photos. The images should be ... there a difference in the performance? See Question&Answers more detail:os...

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How to autoupdate android app without playstore? Like Facebook app or any Contest app

How do apps update internally automatically without updating from playstore? I mean the internal data of app is changed ... Any tutorial on it? See Question&Answers more detail:os...

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algorithm - Median of 5 sorted arrays

I am trying to find the solution for median of 5 sorted arrays. This was an interview questions. The solution I ... ] => expected median = 7 See Question&Answers more detail:os...

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homebrew - After MySQL install via Brew, I get the error - The server quit without updating PID file

Ok, I've searched all over and have spent quite a bit of my time installing, uninstalling, trying various option ... my username on my machine. See Question&Answers more detail:os...

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How do I make a JSON object with multiple arrays?

I've never used JSON before so I'm not familiar with its syntax. At the moment I have multiple arrays ... explained the syntax with an example. See Question&Answers more detail:os...

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linux - When should I use TCP_NODELAY and when TCP_CORK?

I understood that both of them disable Nagle's algorithm. When should/ shouldn't I use each one of them? See Question&Answers more detail:os...

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Receive audio via Bluetooth in Android

I want to create an Android application that is capable of receiving an audio stream. I thought of using the ... 2.3 Gingerbread. /Johnny See Question&Answers more detail:os...

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Ruby: Easiest Way to Filter Hash Keys?

I have a hash that looks something like this: params = { :irrelevant => "A String", :choice1 => "Oh look, another ... do it in one or so lines. See Question&Answers more detail:os...

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python - pass **kwargs argument to another function with **kwargs

I do not understand the following example, let's say I have these functions: # python likes def save(filename, ... 's the reason behind this? See Question&Answers more detail:os...

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user interface - Cross-platform gui toolkit for deploying Python applications

Building on: http://www.reddit.com/r/Python/comments/7v5ra/whats_your_favorite_gui_toolkit_and_why/ Merits: 1 - ease of ... - others? (specify) See Question&Answers more detail:os...

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How to strip leading "./" in unix "find"?

find . -type f -print prints out ./file1 ./file2 ./file3 Any way to make it print file1 file2 file3 ? See Question&Answers more detail:os...

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php - Hunting cheaters in a voting competition

Currently we are running a competition which proceeds very well. Unfortunately we have all those cheaters back in ... be very appreciated... See Question&Answers more detail:os...

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css - bootstrap button shows blue outline when clicked

I added this but still the blue outline appear when the button is clicked. .btn:focus { outline: none; } how to remove that ugly thingy? See Question&Answers more detail:os...

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c# - Cannot obtain value of local or argument as it is not available at this instruction pointer, possibly because it has been optimized away

Visual Studio 2010 kills (there is no other word) data in one of the arguments of the function in the unsafe ... it has been optimized away. See Question&Answers more detail:os...

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python - Counting unique values in a column in pandas dataframe like in Qlik?

If I have a table like this: df = pd.DataFrame({ 'hID': [101, 102, 103, 101, 102, 104, 105, 101], ... is the equivalent way to do it in pandas? See Question&Answers more detail:os...

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Validating with an XML schema in Python

I have an XML file and an XML schema in another file and I'd like to validate that my XML file adheres ... a third-party package if necessary. See Question&Answers more detail:os...

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python - Lambda including if...elif...else

I want to apply a lambda function to a DataFrame column using if...elif...else within the lambda function ... ? Thanks for any response. See Question&Answers more detail:os...

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python - Django admin - inline inlines (or, three model editing at once)

I've got a set of models that look like this: class Page(models.Model): title = models.CharField( ... model editing? Thanks in advance. See Question&Answers more detail:os...

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php - Algorithm to get the excel-like column name of a number

I'm working on a script that generate some Excel documents and I need to convert a number into its column name ... . $r; return $r; } See Question&Answers more detail:os...

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Define constant variables in C++ header

A program I am working on has many constants that apply throughout all classes. I want to make one header file ... quite sure how to though. See Question&Answers more detail:os...

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.net - Why does this polymorphic C# code print what it does?

I was recently given the following piece of code as a sort-of puzzle to help understand Polymorphism and ... eventually displayed on screen? See Question&Answers more detail:os...

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android - How to secure my app against piracy

I am developing an android app and I am planning to publish it (paid app). I have heard that it is ... , experiences, comments you can share? See Question&Answers more detail:os...

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python - Type annotations for *args and **kwargs

I'm trying out Python's type annotations with abstract base classes to write some interfaces. Is there a way to ... for *args and **kwargs? See Question&Answers more detail:os...

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javascript - How to monitor the memory usage of Node.js?

How can I monitor the memory usage of Node.js? See Question&Answers more detail:os...

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c# - How to find path of active app.config file?

I'm trying to finish this exception handler: if (ConfigurationManager.ConnectionStrings["ConnectionString"]==null) { string ... I'm using nUnit. See Question&Answers more detail:os...

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