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QUESTION
i have this input file.. I need to remove the duplicated rows in column 13 but I have a problem with the data that contains a "-" why does it not remove them
input
...ANSWER
Answered 2021-Jun-16 at 01:50If your sample input is accurate, some of your column 13 contain trailing whitespace. If you want to treat them as being the same value, you can trim it.
For example, before using column 13, you could do:
QUESTION
I am trying to understand how JavaRx's Flux.merge and switchIfEmpty work together in regards to the below code as I am a bit confused on results I am seeing which is no doubt the result of my not fully grasping Java RX.
My question is ... If the call to wOneRepository... returns an empty list or the call to wTwoRepository... returns an empty list, will the switchIfEmpty code get executed? Or will it only get executed if both calls return an empty list?
...ANSWER
Answered 2021-Jun-14 at 14:30switchIfEmpty()
will only be called if the upstream Flux
completes without emitting anything, and that will only happen if both f1
and f2
complete without emitting anything. So, if both findWidget
calls fail, or both return empty Flux
instances, or some combination of those, then switchIfEmpty
will be called. If either f1
or f2
emits a Widget
, then that Widget
will be emitted from the merge
operator, which means switchIfEmpty
will not be called.
QUESTION
Here is what i want to do: I want to replace certain tokens in a string, but only if they are not inside another word. Example:
...ANSWER
Answered 2021-Jun-14 at 14:49Assuming you want to replace pos
only as a standalone word, just use word boundaries:
QUESTION
I am trying to learn to make 3D games in JavaScript using HTML 2D canvas. I was following this post about it and I made a simple scene that you can move around in.
What I need help with is figuring out how to make the effect of the player turning their head, to look side to side and behind them.
Here is what I have:
Code (also on codepen)
html:
...ANSWER
Answered 2021-Jun-14 at 03:09First of all, you should not update the coordinates of the crates from the movement of the camera. Instead, let the camera have its own position in 3D space, update that position when you want the player to move, and then subtract the camera position from the crates' positions when calculating the 2D space coordinates. This will make things much easier when you later want to add, for example, the ability for the camera to rotate or the crates themselves to move.
Now to add a rotation capability to the camera, you will need to define a rotation matrix for it in addition to a position. Then, when rendering the crates, you transform the crate coordinates (after subtracting the camera's position) using the inverse of the camera's rotation matrix. This will give you the view space coordinates of the crates, which should be projected onto the 2D space for rendering.
There are many ways to create a rotation matrix depending on what parameters you have. A common one is the Rodrigues rotation formula or "axis-angle" formula, which is used when you have an axis of rotation and an angle to rotate about that axis. Another one is from Euler angles. And if you aren't familiar with matrices and linear algebra, I would recommend you to learn it (there are a lot of free resources available online) as it is used extensively in 3D game development.
QUESTION
Project largely working. Have a 125Khz RFID module on an Arduino Uno, with SD card module and and RTC, all working nicely and passing data via PLX-DAQ to Excel and storing data to SD card.
I need a way of working out when the Uno is connected via PLX-DAQ to USB/serial, or when the Uno is just on battery.
So I thought to set a particular cell on Excel with the PLX-DAQ form macro in VBA to 1 (when connected) or 0 (disconnected) then read that in the Arduino code to determine whether to pass data via serial to excel or pull stored data off SD card.
The cell J4 toggles 0 or 1 according to whether disconnected / connected.
I then use the GET function of PLX-DAQ to read a cell from the Arduino sketch.
To upload the sketch I have to disconnect the connection between the RFID Tx and Arduino Rx or I get an error, which is normal, and if I run the sketch with that wire disconnected GET works fine.
...ANSWER
Answered 2021-Jun-12 at 01:54I assume you leave the arduino TX wire connected to the PC-RX. Thats why your PLX-DAQ still has the input. And as you suspect nothing will be going back.
First I thought, since nothing will come back, so your code will be stuck on
QUESTION
Problem
I have a large JSON file (~700.000 lines, 1.2GB filesize) containing twitter data that I need to preprocess for data and network analysis. During the data collection an error happend: Instead of using " as a seperator ' was used. As this does not conform with the JSON standard, the file can not be processed by R or Python.
Information about the dataset: Every about 500 lines start with meta info + meta information for the users, etc. then there are the tweets in json (order of fields not stable) starting with a space, one tweet per line.
This is what I tried so far:
- A simple
data.replace('\'', '\"')
is not possible, as the "text" fields contain tweets which may contain ' or " themselves. - Using regex, I was able to catch some of the instances, but it does not catch everything:
re.compile(r'"[^"]*"(*SKIP)(*FAIL)|\'')
- Using
literal.eval(data)
from theast
package also throws an error.
As the order of the fields and the legth for each field is not stable I am stuck on how to reformat that file in order to conform to JSON.
Normal sample line of the data (for this options one and two would work, but note that the tweets are also in non-english languages, which use " or ' in their tweets):
...ANSWER
Answered 2021-Jun-07 at 13:57if the '
that are causing the problem are only in the tweets and desciption
you could try that
QUESTION
I want to get a document in a stored procedure by partition key and id.
I guess readDocument is a function for point reads.
readDocument(String documentLink, RequestOptions options)
It needs a "documentLink" string as the first argument.
What is it?
...ANSWER
Answered 2021-Jun-11 at 05:11From the docs,
The format for documentLink is always "dbs/{db identifier}/colls/{coll identifier}/docs/{doc identifier}" only the values within the {} change depending on which method you wish to use to address the resource.
You can generate one in code
QUESTION
Note: I'm new to network and dpdk, so there might be some misunderstanding in fundamental concepts...
I want to run 2 instances of dpdk-testpmd
on the same host to send and receive traffic over separate NIC.
Configuration:
NIC:
- PMD: MLX5
- version: 5.0-1.0.0.0
- firmware-version: 16.26.1040 (MT_0000000011)
- NUMA-Socket: same
- PCIe: 0000:3b:00.0, 0000:3b:00.1
Update
- DPDK Version: 20.11.1
- Hugepage Total: 32768
- Hugepage Free: 32768
TESTPMD Logs:
...ANSWER
Answered 2021-Jun-13 at 05:04Note: I highly recommend reading about dpdk testpmd as it covered all your questions in detail. As per the StackOverflow guideline multiple sub-questions make answering difficult. Please use well-formatted and formed question for better reach and answers.
@Alexcured since you have mentioned you know how to run 2 separate instances of dpdk-testpmd
. I will only recommend heavily reading up on dpdk-testpmd URL which has answers to most of your questions too.
The assumption is made, both the PCIe NIC are working properly and interconnect between 2 are tested with either arping or ping (Kernel Driver). After binding both PCIe devices to DPDK supported drivers, one should use options for DPDK 20.11.1 such as
- use file-prefix option as unique names
- set socket-memory to fetch memory from the desired NUMA-SOCKET
- set socket-limit to prevent ballooning of huge page mmap
- use w|b option to whitelist|blacklist PCIe devices (0000:3b:00.0 and 0000:3b:00.1)
- Since it is separate physical devices ensure there physical cable connection between 2 PCIe ports.
[Q.1] How to set the MAC address of instance 2's port in instance 1?
QUESTION
I want to send data from from to another one
I'm new in qt i googled my problem and find many solution but no one focused one qstring value
login.cpp
...ANSWER
Answered 2021-Jun-11 at 09:48this is worked for me
QUESTION
I am trying to learn both state management & dependancy injection with this demo project. I'm trying to demo injecting some methods all over the place like I may need to in my program. I'm using GetX because I like being able to do this without context in non-widget classes.
So my problem here is the last method, summationReturns(), in the last class below. Attempts to take methods with return statements and add them together. I call this in two places. In the floating button, this works fine but in my text widget I get a dirty state error.
Why is this not working when everything else works? And I assume this will be a corollary from the last question, what is a dirty state? Seems like two questions but I would imagine that they are one in the same.
...ANSWER
Answered 2021-Apr-22 at 06:15Calling update
while build is ongoing is an example of dirty scenario. To fix your issue, do not call update
inside the GetBuilder
.
Sample...
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