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Development

X Y Coordinates in 2D Javascript Array

I searched quite a lot but nothing works. I have to push x y Coordinates to a array which has to look like that : [[0, 0], [10, 10], [20, 50]] (feeding regression.js). If I get x, y values every second how can I push them to an array, so that regression.js is accepting it? […]

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Development

Finding polynomial used in CRC-8 calculation table

Here as most rated answer (Implementing CRC8 on Arduino to write to MLX90614) is good example of CRC-8 calculation/finding using lookup table. I would like to know what is polynomial used to generate that table values. Tried this nice calculator of tables, but cannot get the same values http://www.sunshine2k.de/coding/javascript/crc/crc_js.html static const uint8_t crc_table[] = { […]

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Development

At the time when I add any element in nested collection view cell, it didn’t crashes but just stop working

Controller One is the first Collection view controller, From here, at cell selection, it navigates me to the controller two. In Controller two I have two Nested Collection View. A horizontal Collection View inside Vertical Collection View Cell. My Issue is that when I try to add Any UI elements in Horizontal Collection View Cell […]

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Development MySQL

Are full count queries really so slow on a large MySQL InnoDB tables?

We have a large tables with millions of entrys. A full count is pretty slow, see code below. Is this quite common for a MySQL InnoDB table? Is there no way to accelerate this? Even with the query cache it’s still “slow”. I also wonder, why the count on “communication” table with 2.8 mio entries […]

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Development

How does javascript resolve parameters?

I am fairly new to JavaScript and coming from a different programming background I have a tough time to understand how JavaScript knows how to resolve parameters passed to a function. Let’s look at and easy example. from the documentation of jQuery .on, I see 2 different signatures: .on( events [, selector ] [, data […]

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Development

Graphdb sparql cannot make federated query

I am trying to make a federated query using my local GraphDB database and SPARQL endpoint. For some reason I always get errors or empty columns in my result table. I tried several SPARQL endpoints which are working perfectly fine on FactForge. My code and error message are below can you help me to get […]

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Development

Line() in d3 generating NaN

Started D3 and JS a week ago. I am trying to plot a Multi-Series Line chart, and I am stuck trying to figure out why line() is returning NaNs. The x domain is discrete string values [“70″,”71″,”72”..”80″]. Using d3 v4. I tried tweaking the X-Y scales, range values etc. Tried to identify fracture point and […]

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Development

Some times I am getting typing activity in chatbot V4 template. With out selecting/typing any text

Typing activity Issue in chatbot v4 Template. I tried with Middle ware and Activity Types still I am facing issue. Step 1: var typingMiddleware = new ShowTypingMiddleware(); options.Middleware.Add(typingMiddleware) Step 2: options.Middleware.Add(new ShowTypingMiddleware(delay:500,period:2000)); Step 3: var typingMsg = dc.Context.Activity.CreateReply(); typingMsg.Type = ActivityTypes.Typing; await dc.Context.SendActivityAsync(typingMsg); Step 4: var typingActivity = new Activity { Type = ActivityTypes.Typing, RelatesTo […]

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Development

Lodash merge: only copy object properties if source value matches destination value

I have two deep/complex objects being merged together. In the ‘addresses’ array there needs to be two objects for two different address types, “PRIMARY” and “MAILING.” In my destination object, “PRIMARY” obj is above the “MAILING” obj. Everything works great except for when there is only a “MAILING” obj available in the source object. When […]

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Development

How to fix VBA regression code that works when executed without a button, but not with a button

I’d like to tie my regression code to a button, but when I do, my regression code no longer works. I have tried to be very explicit on where the ranges are, enabling more references (Solver, atpvbaen.xls, Ref Edit Control), and rewriting the syntax of my code. Dim nextReg As Integer Dim nextRegEnd As Integer […]