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I am performing the following calculation which is verrryyy slow (mostly because the DataFrame that I am looping through (PM_mix) is very large). I know you're not supposed to loop through DataFrames if at all possible, but I don't know the best way to avoid this. I feel like the solution may be to execute the calculation using numpy and then convert the output array to a DataFrame, but I don't know the best way to go about this. Since I am essentially trying to multiply each DataFrame column by an array (F_range), would it be worth trying to calculate a multidimensional array, and then flatten? I would appreciate any of your suggestions - thanks!

I am getting some errors while trying to run a Perl file which is I need to run. (I usually use Python but I do not know any other programming languages including Perl.) I will show errors firstly, then I will attach the whole code in the end.

The error:

i have the following code developed in python using the library Docplex to solve an optimal model:

I created a simple catalog item component using stencil.js. In the component there is canvas tag that on it I painted animating curved lines. At the componentDidLoad function, I define the canvas, initialize it and call the animate function. This is the code of the component itself:

I am getting this error all of sudden in Jenkins build, i tried upgrading to latest Angular that is 10.1 but even after upgrading issue is not resolved. So i rolled back to Angular 10.0, package.json dependencies below

[09/11/2020 03:26:56.420] - Build:: Compiling @angular/platform-browser-dynamic/testing : es2015 as esm2015 [09/11/2020 03:27:09.120] - Build:: Error: Error on worker #5: TypeError: dir[ioType].hasBindingPropertyName is not a function [09/11/2020 03:27:09.120] - Build:: at Project_folder/node_modules/@angular/compiler/bundles/compiler.umd.js:30061:79 [09/11/2020 03:27:09.120] - Build:: at Array.find () [09/11/2020 03:27:09.120] - Build:: at setAttributeBinding

Package.json

I am currently making an emulator for the NES (like many others) , and while testing my emulation against the nestest rom by Kevtris (found here : https://wiki.nesdev.com/w/index.php/Emulator_tests), there is a weird bug I've encountered , at the instruction 877 on the nestest log (this one : http://www.qmtpro.com/~nes/misc/nestest.log , at line CE42) .

The instruction is a PLA , which pulls the accumulator from the stack , while having the stack pointer at $7E at the beginning. (I'm using a 1 byte value for the stack pointer , since it goes from 0x0100 to 0x01FF , so when I write $7E talking about the stack , it's 0x017E , not zeropage ;) )

So , when PLA is executed at line 877, the stack pointer moves to $7F and retrieve the first byte and store into the accumulator .

The problem is here : on the nestest log , this byte is 0x39 , then , on instruction 878 which is also a PLA , the retrieved byte at $80 (stack pointer incremented + 1) , is 0xCE, and this has inverted the low byte and high byte.

The values written on the stack (0xCE39) have their origin in the JSR instruction at line CE37 and here is my implementation of the JSR opcode :

I want to make multiple circles travel along the path. I made from the reference here

I've been struggling with a topic related to IRQ (interrupts itself); i'm using an old MC68HC11

Been practicing for a while; i decided to move on and check the hardest exercises showed in this chapter that's why i found an interesting one (and a little tricky tbh)

Take a look at this:

This is what i tried so far (This is just an outline):

Do NOTE:

FLAGNMI means XIRQ

FLAGIQR means IRQ

Write an assembly language program that searches backwards through memory locations F454h - F503h for memory locations that contain the ASCII value for a lower case 'a' and places the total into location 0500h. Have the program start at 0200h in memory. Assemble the program, load it into the emulator, run it, and verify that it works correctly.