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Georgianna Johnston

Questions by Georgianna Johnston

break out of if and foreach?

I have a foreach loop and an if statement. If a match is found i need to ultimately break out of the foreach. foreac...

Chart.js How to make a sample math axis??

I want to have x, y-axis like the following image. It is really sample, but the x,y across on (0,0). and I want th...

Adding items to an object through the .push() method?

I'm doing a loop through few input elements of 'checkbox' type. After that, I'm adding values and checked attributes...

Count number of rows within each group?

I have a dataframe and I would like to count the number of rows within each group. I reguarly use the aggregate func...

Create a file if it doesn't exist?

I'm trying to open a file, and if the file doesn't exist, I need to create it and open it for writing. I have this s...

How many PCA axes are significant under this broken stick model??

Following the usual methodology I have created a screeplot to assess how many principal component axes are signifi...

How to make CORS-enabled HTTP requests in Angular 2??

The error is the following: XMLHttpRequest cannot load http://some_url.herokuapp.com/api/some_api/. No 'Access-C...

What is the difference between retq and ret??

Let's consider the following program, which computes an unsigned square of the argument: .global foo .text foo: ...

How do you wrap setTimeout in a promise?

I am trying to run a test suite for an object that returns a promise. I want to chain several actions together with...

How can I change the version of npm using nvm??

I've been using NVM to install the latest versions of nodeJS for my node work. It works totally fine for installing ...

Google Spreadsheet Import Range #REF! Error (Randomly)?

This problem has been persistent for a while, just happens every so often at random times, nothing changing. I also ...

Which exception to throw for invalid input which is valid from client perspective?

I am writing code to find and intersection of 2 lines. When slopes of the lines are equal they dont intersect. But o...