financier | A Node.js module to handle stocks and portfolios | Portfolio library

Try this it will work fine:

You can use pd.melt from pandas and reshape your dataset. Assuming your dataframe is called df, use the following :

You should look into the reduce function 😀

Also, what will you do when your object contains duplicate names?

I would recommend using an id to identify the persons instead of the names, and then index the object with the id. If you want their name, you can use a hashmap for this.

The code that you referred to on the WordPress site has some flaws.

Because of the way that they created the feed it is a hot observable in that every subscription will receive a different set of figures. So the feedLo and the feedHi observables will be working from different sets of variables.

But it gets worse. If two subscriptions are made to feedLo, for example, then there will be two subscriptions to feed but only one state variable for min which means that the value coming out will be the minimum value of both subscriptions and not the minimum for each.

I'll show how to do this properly, but first your question is about how to encapsulate state. Here's how:

This is what I would do (not seeing the full code it is hard to write a full solution (also this will eat up a lot of memory, but again - in order to optimize this I would need to see the code; what I write has a benefit of being simple to implement and not require locking).

So the recommendation is:

1. create cr2_vec = [copy(cr1) for i in 0:499]
2. in outer loop write cr2 = cr2_vec[k]
3. Then do all the processing on cr2
4. after the @threads loop finishes take cr2_vec, which will have updated data frames and from each data frame of this vector take the columns that are needed and add it to your original cr1 data frame.

A more advanced solution would be not to use a vector of data frames, but just a single data frame, as you do, but after the computing is done use a lock and within a lock update the global cr1 with only the computed columns (you need to use lock to avoid race condition).

EDIT

An example of a more efficient implementation:

This sample aims to concentrate on two relevant parts of the problem of this question: Adding a total line for each group and showing the grouped column content only once.

The query is split into two parts which is connected by a union.

First part uses the window function row number to output the financier name only in the first row of a group.

Second part is a ordinary GROUP BY with a column prefixed with 'TOTALS FOR' the result of the UNION is ordered by the financier name and the id, so that the total line always appears under the rows of that financier.

Try it here https://www.db-fiddle.com/f/qJfH4WYjABuw7MppVLHYFi/0

You don't need a separate modal for each image. You just need a one modal that will display different images.

Using javascript, you need to add a click event listener to the container of all the items. When any items is clicked, get the src attribute of the img element associated with that item and set this src attribute as the src attribute of the img in the modal.

Here's a demo in which i have 3 images which are displayed in a modal one at a time depending on which image label you clicked on.

If I understand you correctly you're thinking of including your service account credentials in an app, that you then ship to your users. I highly recommend against doing that.

Any information you include in the APK, or that is loaded by the app at runtime, can in principle be intercepting by users of that app. And if they do so, the service account credentials will give them full, unrestricted access to your project.

The most common way to secure access is by signing the user's in to Firebase Authentication, and using that information in the security rules of your database, and in Cloud Functions.

You can either have them sign in with an existing provider, build your own custom provider, or even use anonymous authentication (which means they don't have to enter any credentials). What all of these have in common is that the user gets a UID, and a token, that is passed to the server and database with each request, and that can't be forged.

That's actually another of the dangers of including your service account credentials in your APK: they'd allow a malicious user to forge their own tokens/UIDs for your project.

An alternative that doesn't require signing in with Firebase Authentication is to route all access to the data to a custom backend that you code, either on your own server, or in Cloud Functions. But this means that you'll have to ensure all access is authorized in that server-side code too. So you'd essentially be writing in server-side code, what you'd otherwise write in Firebase's server-side security rules.

Component props should not be mutated by itself. I think there are 2 solutions for you in this situation.

1. Copy this.props.history to state, and mutate history by calling setState. Put the checking of selectedNavigation outside of render. For example (just my idea, please modify it base on your application logical):