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QUESTION
I am trying to add a datetime column which purpose should be to give an exact time on when a row inserted. At the moment this is done in a MERGE statement from a view to a table. The issue is that the merge statement clumps all the merges into the same datetime.
I do wonder if there is a way to add the current_datetime to a row-by-row load basis? An expected result could be as below, if it takes 0.001 seconds to load a new row:
ID LOAD TIME 123 2021-05-24 17:34:21.000 456 2021-05-24 17:34:21.001The issue I have today is that all of the LOAD TIME rows that are merged in the same statement have the same LOAD TIME. Is that simply how the MERGE statement works? Are there other ways to achieve the result I want?
...ANSWER
Answered 2021-May-25 at 11:45That's how current_timestamp
works in Snowflake. It takes the start time of the transaction, not the wallclock time. Since the Merge runs atomically all of the rows get the same timestamp (this is normally what you want).
In Postgres, there is a timeofday()
function that would do this, I don't believe there is an equivalent in Snowflake however.
QUESTION
I have just come across pexpect
and have been figuring out how to use it to automate various practices I would otherwise have to fill in manually in a command shell.
Here's an example script:
...ANSWER
Answered 2021-May-10 at 21:04You don't need to wait for #
between each command. You can just send all the commands and ignore the shell prompts. The shell buffers all the inputs.
You only need to wait for the username and password prompts, and then the final #
after the last command.
You also need to send an exit
command at the end, otherwise you won't get EOF.
QUESTION
Recently I've been trying to learn C++ through SFML. The Project I'm working on at the moment is Minesweeper (https://minesweeper.online/ if not familiar with the game). I want to avoid having to attach too much code so I'll explain step by step what the program does and elaborate on parts that run into issues.
- A
Grid
object is created, containing two 2D arrays,grid
andstategrid
. populate()
populatesgrid
with a certain amount of randomly placed mines, in this case 1 mine, for simplicity's sake.- the
analyze()
function fills in the amount of surrounding mines per tile. - the
check()
function checks if the mines are not too clumped together, if so, it repeats steps two and three.
An important thing to notice is that the stategrid
array stores wether a tile has been 'discovered' or not. Another is that 'discovering' these tiles needs to be done recursively, as when you discover empty tiles, you must maneuver around corners and into cavities. The way I set this up is that when you 'open up' a specific tile with the dig()
function and adjacent tiles are empty, these are opened aswell. The reason why this SO error surprised me is that I have set the condition that if a tile had been opened before, it could not be opened again as to avoid looping indefinitely, causing such an error.
Any help with this would be greatly appreciated.
PS: If this snippet of code is incomplete or additional information is required, please let me know.
PPS: It's quite late already where I live, so this could just be the result of late-night-blindness to details ;)
...ANSWER
Answered 2021-May-02 at 11:42Turns out my grid was too big considering i only had one mine, so there were too many empty squares and recursion went too deep. With more mines/smaller grid the program worked fine.
QUESTION
Website Link: https://catevolution.com.au/
HTML code:
...ANSWER
Answered 2021-Apr-14 at 12:23Try one of these Xpath expressions:
- "//div[@class='megamenuToggle-wrapper']"
Or:
- "//div[contains(text(),'Navigation')]"
QUESTION
Given is an initial raster
...ANSWER
Answered 2021-Apr-14 at 20:19You can use focal
with a custom function argument. Something like the below.
QUESTION
I am trying to create a plot made of 5 subplots made of simple line graphs using Matplotlib and Pandas on Visual Studio code. However, for some reason the image always looks very small and clumped up even if I make the figure very big. I tried modifying the space between figures with subplots_adjust but that doesn't change anything.
Here is my code
...ANSWER
Answered 2021-Mar-29 at 16:46A couple of suggestions that might help- first matplotlib has a function "tight_layout" which can help set the white space sensibly and reduce the number of tick labels. documentation. To use it simply call plt.tight_layout()
just before plt.show()
But this won't solve the problem of there being lots of text on your figure. You could try and save text by using a suptitle of "Stock returns over time" as shown here and simply referring to each plot by the stock name for the sub plot titles.
It might also be worth considering if a different style of plot could do a better job. If the returns are of similar magnitude and over the same time period it may make more sense to have them as different coloured lines on the same axes, with a legend showing identifying the stocks
QUESTION
I'm currently making an HTML5 game, and I'm trying to draw various things onto the canvas. My game is basically just where you move around in an infinite area, but I can't figure out how to optimize my code to draw bushes onto the screen. It works properly, but It lags a lot and I know there's ways to optimize it. Here's my current code:
...ANSWER
Answered 2021-Feb-28 at 15:03Many many years ago, as computers weren't as fast as today and you had to do some hefty mathematical operations like computing the sine or cosine - or even the modulo - there was just one option:
instead of calculating it everytime you need it, calculate it once and store it in a huge look-up table. Looking up a value is of course way faster than computation.
So in your case I'd recommend generating two arrays for the modulo of x and y
QUESTION
I want to create subsets of raster stacks and write them as new stacks when the difference between the previous layer and the next layer is all NA following each clump of the raster layers. Without clumps, I would achieve this by following Robert's answer in this question ( as below in script). However, I want to run this by considering the clumps too. There may be 1 or 2 clumps in each layer. So starting from layer 1
in the example data stack below, I want to identify the clumps numbers and for each clump, create a subset of raster stacks until there are no-overlapping pixels between the previous and next layers (i.e., the difference between the two layers is all NA
). So I want is; starting from layer 1
, for each clump, retain all the layers that have at least 1 common pixel between the previous and next layer, write them as a 1 stack, and move to the next.
In the sample r_stk
, I want to retain layers 1:8 for clump 1 (top) assign them as 1 stack, run for clump 2 (bottom), and again retain layers 1:5 assign them as a new stack, and so on.
Below are the sample data and code that would work fine following this answer if there would be no clumps.
ANSWER
Answered 2021-Feb-25 at 05:31Your example data
QUESTION
ANSWER
Answered 2021-Feb-19 at 12:49As you have found, Spacers behave differently when they are in a ScrollView or not, or put differently, when the axis they can expand on is infinite or finite.
If what you want is for your content to be centered vertically when it fits and scroll when it's larger than the screen, I would do something like this:
QUESTION
I have a table with two columns name
and age
. I want to keep the names clumped together but order the clumps by the clump containing the youngest age.
ANSWER
Answered 2021-Feb-16 at 23:04You need to order by age as well. Add this to the end of your query might do the trick
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