Make a negative number positive
I have a Java method in which I'm summing a set of numbers. However, I want any negatives numbers to be treated as positives. So (1)+(2)+(1)+(-1) should equal 5. I'm sure there is very easy way of d...
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- 8 Aug at 09:59
C# - Multiple generic types in one list
This is probably not possible, but I have this class: ``` public class Metadata<DataType> where DataType : struct { private DataType mDataType; } ``` There's more to it, but let's keep it simpl...
How to validate IP address in Python?
What's the best way to validate that an IP entered by the user is valid? It comes in as a string.
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- 25 Nov at 23:42
How do I find out which process is locking a file using .NET?
I've seen several of answers about using [Handle](http://technet.microsoft.com/en-us/sysinternals/bb896655.aspx) or [Process Monitor](http://technet.microsoft.com/en-us/sysinternals/bb896645.aspx), bu...
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- 20 Jun at 09:12
Abstraction VS Information Hiding VS Encapsulation
Can you tell me what is the difference between and in software development? I am confused. Abstraction hides detail implementation and information hiding abstracts whole details of something. I f...
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- 23 May at 11:47
Unable to negotiate with 40.74.28.9 port 22: no matching host key type found. Their offer: ssh-rsa
After start of using NixOS as a new package management system, I get the following error when using git within Azure DevOps repositories and rsa ssh key: ``` jaroslavbezdek@mac> git pull Unable to neg...
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- 22 Feb at 14:31
Why doesn't the new hat-operator index from the C# 8 array-slicing feature start at 0?
C# 8.0 introduces a convenient way to slice arrays - see [official C# 8.0 blogpost](https://blogs.msdn.microsoft.com/dotnet/2018/11/12/building-c-8-0/). The syntax to access the last element of an arr...
Importing images in TypeScript React - "Cannot find module"
I am trying to import images to use inside a React component with TypeScript. The bundler I'm using is Parcel (not Webpack). I have created a `.d.ts` file inside the project with the image file exten...
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- 11 Oct at 21:38
googletrans stopped working with error 'NoneType' object has no attribute 'group'
I was trying `googletrans` and it was working quite well. Since this morning I started getting below error. I went through multiple posts from stackoverflow and other sites and found probably my ip is...
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- 10 Dec at 18:36
How to properly make mock throw an error in Jest?
I'm testing my GraphQL api using Jest. I'm using a separate test suit for each query/mutation I have 2 tests (each one in a separate test suit) where I mock one function (namely, Meteor's `callMetho...
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- 28 Jan at 22:55
How to add Document with Custom ID to firestore
Is there any chance to add a document to firestore collection with custom generated id, not the id generated by firestore engine?
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- 12 Feb at 17:13
How to update an "array of objects" with Firestore?
I'm currently trying Firestore, and I'm stuck at something very simple: "updating an array (aka a subdocument)". My DB structure is super simple. For example: ``` proprietary: "John Doe", sharedWith...
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- 23 Sep at 05:49
Can I merge table rows in markdown
Is there a way to create merged rows in a column of table in markdown files like ReadMe.md files? Something like this: [](https://i.stack.imgur.com/Z4k5w.png)
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- 7 Oct at 15:35
How to define an interface for objects with dynamic keys?
I have an Object like this that is created by underscore's `_.groupBy()` method. ``` myObject = { "key" : [{Object},{Object2},{Object3}], "key2" : [{Object4},{Object5},{Object6}], ... } ``` H...
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- 23 Jul at 11:17
Mockito : doAnswer Vs thenReturn
I am using Mockito for service later unit testing. I am confused when to use `doAnswer` vs `thenReturn`. Can anyone help me in detail? So far, I have tried it with `thenReturn`.
unique combinations of values in selected columns in pandas data frame and count
I have my data in pandas data frame as follows: ``` df1 = pd.DataFrame({'A':['yes','yes','yes','yes','no','no','yes','yes','yes','no'], 'B':['yes','no','no','no','yes','yes','no','...
How to submit a form using Enter key in react.js?
Here is my form and the onClick method. I would like to execute this method when the Enter button of keyboard is pressed. How ? N.B: ``` comment: function (e) { e.preventDefault(); this.props.com...
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- 21 Apr at 05:54
How to manually invoke Link in React-router?
I have a component that receives through props a `<Link/>` object from . Whenever the user clicks on a 'next' button inside this component I want to invoke `<Link/>` object manually. Right now, I'm us...
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- 29 Dec at 03:19
How to loop and render elements in React.js without an array of objects to map?
I'm trying to convert a jQuery component to React.js and one of the things I'm having difficulty with is rendering n number of elements based on a for loop. I understand this is not possible, or re...
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- 30 Jan at 10:4
How to wait for a JavaScript Promise to resolve before resuming function?
I'm doing some unit testing. The test framework loads a page into an iFrame and then runs assertions against that page. Before each test begins, I create a `Promise` which sets the iFrame's `onload` ...
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- 17 Dec at 09:35
Java verify void method calls n times with Mockito
I'm trying to verify that a (void) method is being called inside of a DAO - I'm using a commit point that sends a list of results up to that point, resets the list and continues. Say I have 4 things ...
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- 5 Jan at 20:37
What is the difference between Xamarin.Form's LayoutOptions, especially Fill and Expand?
In Xamarin.Forms every `View` has the two properties `HorizontalOptions` and `VerticalOptions`. Both are of type `LayoutOptions` and can have one of the following values: - `LayoutOptions.Start`- `La...
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- 16 Aug at 08:56
How to get the host name of the current machine as defined in the Ansible hosts file?
I'm setting up an Ansible playbook to set up a couple servers. There are a couple of tasks that I only want to run if the current host is my local dev host, named "local" in my hosts file. How can I d...
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- 17 Jan at 14:16
How to switch a user per task or set of tasks?
A recurring theme that's in my ansible playbooks is that I often must execute a command with sudo privileges (`sudo: yes`) because I'd like to do it for a certain user. Ideally I'd much rather use sud...
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- 7 Feb at 13:21