How do I create an average from a Ruby array?
How would get find an average from an array? If I have the array: ``` [0,4,8,2,5,0,2,6] ``` Averaging would give me 3.375.
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- 5 Nov at 17:2
Random String Generator Returning Same String
I've developed a random string generator but it's not behaving quite as I'm hoping. My goal is to be able to run this twice and generate two distinct four character random strings. However, it just ...
How do I declare class-level properties in Objective-C?
Maybe this is obvious, but I don't know how to declare class properties in Objective-C. I need to cache per-class a dictionary and wonder how put it in the class.
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- 30 Mar at 04:58
JAX-RS / Jersey how to customize error handling?
I'm learning JAX-RS (aka, JSR-311) using Jersey. I've successfuly created a Root Resource and am playing around with parameters: ``` @Path("/hello") public class HelloWorldResource { @GET @P...
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- 21 Aug at 19:9
Capture characters from standard input without waiting for enter to be pressed
I can never remember how I do this because it comes up so infrequently for me. But in C or C++, what is the best way to read a character from standard input without waiting for a newline (press enter)...
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- 20 Sep at 07:44
Shell command to find lines common in two files
I'm sure I once found a shell command which could print the common lines from two or more files. What is its name? It was much simpler than [diff](https://linux.die.net/man/1/diff).
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- 30 Nov at 16:10
List of strings to one string
Lets say you have a: ``` List<string> los = new List<string>(); ``` In this crazy functional world we live in these days which one of these would be best for creating one string by concatenating th...
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- 25 Nov at 20:38
Is there a code obfuscator for PHP?
Has anybody used a good obfuscator for PHP? I've tried some but they don't work for very big projects. They can't handle variables that are included in one file and used in another, for instance. Or ...
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- 8 Dec at 12:52
Best way to detect when a user leaves a web page?
What is the best way to detect if a user leaves a web page? The `onunload` JavaScript event doesn't work every time (the HTTP request takes longer than the time required to terminate the browser). C...
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- 25 Nov at 10:32
When a 'blur' event occurs, how can I find out which element focus went *to*?
Suppose I attach an `blur` function to an HTML input box like this: ``` <input id="myInput" onblur="function() { ... }"></input> ``` Is there a way to get the ID of the element which caused the `bl...
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- 1 Sep at 11:19
Is there any way to do HTTP PUT in python
I need to upload some data to a server using HTTP `PUT` in python. From my brief reading of the urllib2 docs, it only does HTTP `POST`. Is there any way to do an HTTP `PUT` in python?
How can I make a ComboBox non-editable in .NET?
I want to have a "select-only" `ComboBox` that provides a list of items for the user to select from. Typing should be disabled in the text portion of the `ComboBox` control. My initial googling of th...
How costly is .NET reflection?
I constantly hear how bad reflection is to use. While I generally avoid reflection and rarely find situations where it is impossible to solve my problem without it, I was wondering... For those wh...
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- 22 Oct at 09:49
Unable to find testhost.dll. Please publish your test project and retry
I have a simple dotnet core class library with a single XUnit test method: ``` TestLib.csproj: <Project Sdk="Microsoft.NET.Sdk"> <PropertyGroup> <TargetFramework>netstandard2.0</TargetFramewor...
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- 19 Feb at 16:26
How to specify Memory & CPU limit in docker compose version 3
I am unable to specify CPU and memory limitation for services specified in version 3. With version 2 it works fine with `mem_limit` & `cpu_shares` parameters under the services. But it fails while usi...
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- 7 Dec at 20:9
How Do I Uninstall Yarn
How can I uninstall yarn? I've used it for a react-native project and now whenever I move the code out of `index.ios.js` or `index.android.js` it throws an error so I'd like to just use npm but whenev...
How do I disable Git Credential Manager for Windows?
I notice that in the latest version of Git, the default is now to popup a "Git Credential Manager for Windows" dialog instead of prompting me for me password at the Bash prompt every time. I really h...
What is the best way to pass AWS credentials to a Docker container?
I am running docker-container on Amazon EC2. Currently I have added AWS Credentials to Dockerfile. Could you please let me know the best way to do this?
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- 25 Jan at 18:47
Angular 2 router no base href set
I am getting an error and can't find why. Here is the error: ``` EXCEPTION: Error during instantiation of LocationStrategy! (RouterOutlet -> Router -> Location -> LocationStrategy). angular2.dev....
Import local function from a module housed in another directory with relative imports in Jupyter Notebook using Python 3
I have a directory structure similar to the following ``` meta_project project1 __init__.py lib module.py __init__.py notebook_folder notebook....
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- 1 Apr at 11:51
Reset MySQL root password using ALTER USER statement after install on Mac
I recently installed MySQL and it seems I have to reset the password after install. It won't let me do anything else. Now I already reset the password the usual way: ``` update user set password = pas...
Random number between 0 and 1?
I want a random number between 0 and 1, like 0.3452. I used `random.randrange(0, 1)` but it is always 0 for me. What should I do?
Open S3 object as a string with Boto3
I'm aware that with Boto 2 it's possible to open an S3 object as a string with: [get_contents_as_string()](http://boto.readthedocs.org/en/latest/ref/file.html?highlight=contents%20string#boto.file.key...
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- 28 Sep at 13:11
What makes the Visual Studio debugger stop evaluating a ToString override?
Environment: Visual Studio 2015 RTM. (I haven't tried older versions.) Recently, I've been debugging some of my [Noda Time](http://nodatime.org) code, and I've noticed that when I've got a local vari...
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- 22 Jul at 18:48
Plotting in a non-blocking way with Matplotlib
I am having problems trying to make matplotlib plot a function without blocking execution. I have tried using `show(block=False)` as some people suggest, but all I get is a frozen window. If I simply ...
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- 1 Aug at 02:6