Do you find you still need variables you can change, and if so why?

One of the arguments I've heard against functional languages is that single assignment coding is too hard, or at least significantly harder than "normal" programming. But looking through my code,...

Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?

Is it guaranteed that False == 0 and True == 1, in Python (assuming that they are not reassigned by the user)? For instance, is it in any way guaranteed that the following code will always...

NumPy or Pandas: Keeping array type as integer while having a NaN value

Is there a preferred way to keep the data type of a numpy array fixed as int (or int64 or whatever), while still having an element inside listed as numpy.NaN? In particular, I am converting an...

Removing first bit

Is there an efficient way to remove the first bit of a number in C++ / Python, assuming you don't know how large the number is or its datatype? I know in Python I can do it by getting the bin(n),...

Assign pandas dataframe column dtypes

I want to set the dtypes of multiple columns in pd.Dataframe (I have a file that I've had to manually parse into a list of lists, as the file was not amenable for pd.read_csv) import pandas as...

How to cast from UInt16 to NSNumber

I have a UInt16 variable that I would like to pass to a legacy function that requires an NSNumber. If I try: var castAsNSNumber : NSNumber = myUInt16 I get a compiler error 'UInt16' is not...

LINQ: Load XML into a Dictionary with value equaling new custom class instances

Struggling a bit with two LINQ statements here. Basically I would like to convert the following two XML files into dictionaries (type-detail to follow). Here are snapshots of the XMLs: Offset...

Expand data frame into combinations of row pairs

I have a data frame that contains an identifier / key column followed by several rows of value columns. I want to expand the data column by taking unique pairs of entries in the key column as the...

Table View header get stuck when implementing pull to Refresh in Swift

I have a table view inside a UIViewController. I have implemented a UIRefreshControl on the tableView. If I drag the table up while the refresh controller wheel is spinning the first header gets...

Choose which variable to solve for (Python root finding using fsolve)

Scipy offers many useful tools for root finding, notably fsolve. Typically a program has the following form: def eqn(x, a, b): return x + 2*a - b**2 fsolve(eqn, x0=0.5, args = (a,b)) and...

Error deploying node.js app to Amazon Elastic beanstalk

I recently deployed a new node.js app on beanstalk and keep running into the following error? [Instance: i-cce89e4a] Command failed on instance. Return code: 1 Output:...

groupby pandas : incompatible index of inserted column with frame index

I have performed a groupby on pandas and I want to apply a complex function which needs several inputs and gives as output a pandas Series that I want to burn in my original dataframe. this is a...

Stop Pandas from converting int to float

I have a DataFrame. Two relevant columns are the following: one is a column of int and another is a column of str. I understand that if I insert NaN into the int column, Pandas will convert all...

TableView section seperator line

I wanted to add separator line into the table view section. Currently the code for the header section view will be: - (void)tableView:(UITableView *)tableView willDisplayHeaderView:(UIView *)view...

I want to use named parameters in Dart for clarity. How should I handle them?

TL;DR: Named parameters are optional as a result of a conscious design choice. Short of having official language support, is there any way to enforce (and inform) required named arguments? I find...

How to disable SSL verification for any request?

I have a Node.JS service running, which I am trying to connect from a different system. Currently using POSTMAN to test the service. Postman gives an error - There was an error connecting to...

Parse complex number from string, considering syntax variations

I'm making a console application where I can input complex numbers. Everything works, but I'd like to be more flexible with the input formatting. Right now it only accepts a+bi, I'd like to make...

Extract value from Row object

Following the office documentation https://trino.io/docs/current/functions/map.html. I use "map_entries" break map into array(row(K, V)) structure. My question is how to extract K and V value from...

shuffling two tensors in the same order

As above. I tried those to no avail: tf.random.shuffle( (a,b) ) tf.random.shuffle( zip(a,b) ) I used to concatenate them and do the shuffling, then unconcatenate / unpack. But now I'm in a...

How to make import from syntax work with electron and typescript?

I'm starting a new project with electron and typescript, I set up the project and got a basic hello world running, however I tried to add a library (https://github.com/benjamn/recast), the import...

Weighting samples in multiclass image segmentation using keras

I am using a Unet based model to perform image segmentation on a biomedical image. Each image is 224x224 and I have four classes including the background class. Each mask is sized as (224x224x4)...

convert a string into a Beautiful Soup object

I'm pretty new to python and posting on here, so any help would be much appreciated! I'm trying to use Beautiful Soup to dynamically parse over 30 different RSS blog feeds. surprisingly, they are...

Very Low performance with 500 agents with A* Pathfinding Unity

I am using A* pathfinding and behaviour manager for AI system in my game and using 500 agents just patrolling around the map. Is it normal? I need to increase the FPS around 60 FPS where it is...

Pointer casting with unknown array size in C++

how can I cast void pointer to a 2d array (array of pointers to arrays of ints), when I dont know array size at compile time? Is it somehow possible? (I am doing this because, I pass an 2d array...

How to use matrix-shaped inputs for dense layer in keras?

To build a regression/forecast model I'd like to take a matrix of sensor-readings (rows~sensors, columns~timepoints) and predict a future trend for these sensors. Example implementation #...

Update Azerothcore with latest updates from master branch

I am currently running Azerothcore via docker on my centos 7 server. I am trying to update it with the updates since i originally set it up. current docker version: Docker version 19.03.12, build...

Superimpose linetype on CI color in marginsplot legend (Stata)

I am wondering if it's possible to superimpose linetypes (the plotopts argument, i.e., dot, dash, solid line, etc.) onto their corresponding CI (the ciopt argument, i.e., color)? I use the...

Why is binding a class instance method different from binding a class method?

I was reading the python docs and stumbled upon the following lines: It is also important to note that user-defined functions which are attributes of a class instance are not converted to bound...

How to use Gekko for trajectory optimization in discrete time

I am trying to use Gekko to optimize (dis)charging of a battery energy storage system. Electricity prices per hour EP, energy production from solar panels PV, and energy demand Dem are considered...

How do I convert a single byte to a []byte

How do I convert a single byte to a slice of bytes in Go? I have tried this in a few different ways however none of them have worked. I keep getting an error stating: cannot convert charBytes[i]...