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User Help

OneDrive Screw Up (How to Repair)

Long, weird, story. We ordered a laptop. It has a short: shocks us, completely crashes, and reboots. We’re sending it back. We ordered an AIO as a replacement. Works fine. Wife had stuff on the laptop. She hand moved most of it to the AIO. OneDrive synced everything it had from the problem laptop to […]

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Mastering Development

Igraph using Python with unknown label and edges

I have two arrays, a and b, as given below, a b -955.594 -782.463 643.384 817.422 -130.747 36.267 1202.7 1370.74 -1383.7 -1168.98 -476.912 -307.98 289.017 456.649 913.926 1133.11 57.2828 262.845 1461.6 1826.45 -787.682 -621.906 484.638 657.123 -1228.91 -1043.19 -304.685 -136.04 1399.39 1573.13 -601.974 -438.326 I would like to draw the networkx graph that group the […]

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Mastering Development

Concatenate two strings together, but have the first line be on the same line in Python

If I had two strings, a and b, and they were defined as the following: a = "Hello\nSome" b = "World\nText" How would I concatenate them together in such a way that all the characters on the first line would be in the first line on the resultant string, and example: def Odd_Concat_Function(i1,i2): […] […] […]

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Ask Chemistry

Dalton’s law of partial pressure ,Mole fraction problem

The problem: If a container has 2 gases ,A and B, what is the mole fraction of gas A? Is there something wrong with the question or these are sufficient information to calculate the mole fraction of gas A ?

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Database Development

Stopping cascading logical replication

Give two primary PG12 servers, A and B, let’s setup logical replication from A to B. A –> B Both servers can and do receive writes, and don’t use sequences or unique constraints so there is no conflict. Is it possible to set up replication from B to A, without replicating the data replicated from […]

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Database Development

Stopping cascading logical replication

Give two primary PG12 servers, A and B, let’s setup logical replication from A to B. A –> B Both servers can and do receive writes, and don’t use sequences or unique constraints so there is no conflict. Is it possible to set up replication from B to A, without replicating the data replicated from […]

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Database Development

Query to find hierarchical relationship between objects

I wan’t to execute a SQL query in PostgreSQL 10.6. I have two tables, A and B, who contains a common field who contains a code. Each code have an inherited code and I wan’t to build a hierarchical classification of this codes. TableA id | code ——— 1 | A 2 | B 3 […]

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Mastering Development

Creating a new dataframe from a dataframe with validation dates and relevant info

I believe this has been asked but not with these extensions in mind. I have a dataframe with product info and prices based on a start date and end date: platform sku start_date end_date price 0 A a 9/5/19 12/31/99 19.99 1 B a 10/28/17 2/20/18 24.99 2 A a 2/21/18 8/19/19. 29.99 3 A […]

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Mastering Development

Two classes referencing each other with hash template specialization

I have two classes, A and B, which both need to be able to reference each other, as shown below. // A.h class B; // Forward declare B template<> struct std::hash<B>; // Forward declare hash template specialization for B class A { std::unordered_map<B, int> map; }; // B.h #include "A.h" class B { A object; […]

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Mastering Development

Elasticsearch searchable synthetic fields

Provided that in a source document (JSON) exist a couple of fields named, a and b, that are of type long, I would like to construct a synthetic field (e.g. c) by concatenating the values of the previous fields with an underscore and index it as keyword. That is, I am looking into a feature […]