sqone | Build lightening fast static sites | Static Site Generator library
kandi X-RAY | sqone Summary
kandi X-RAY | sqone Summary
Build lightening fast static sites.
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QUESTION
I am learning React by trying to make a simple game. In this game, I have a container component that manages a countdown timer. When the player starts the game I run the following function:
...ANSWER
Answered 2019-Jan-01 at 19:45Yes in general you should try to avoid updating the Board
component every time the clock ticks. It would probably be best to turn your Board
component to a PureComponent
.
As mentioned in the docs PureComponent
already implements shouldComponentUpdate
:
React.PureComponent is similar to React.Component. The difference between them is that React.Component doesn’t implement shouldComponentUpdate(), but React.PureComponent implements it with a shallow prop and state comparison.
Make sure you read the caveat of the shallow comparison further down in the documentation.
QUESTION
Hello and good morning,
I am back again with ANOTHER question I am stumped on. I feel like a failure.
Currently, I am using the Access Query Wizard to build a relatively large query. I am pulling from 7 different tables from an outside data source.
I currently have one query (sqONE) which will return to me all of the functions an employee can do. An employee can do more than one function, and a function can be done by more than one. I am using the totals function here.
Then, I have another query (sqTWO)which looks at all the times that an employee did something wrong (i.e., an error). It uses sqONE and then lists every error and what the error was coded as (error number, error description).
However, I now want to do a THIRD query (sqTHREE) which will calculate how much time the employee needed to fix that error. The problem is they might do half an hour here...2 hours there...4 hours here...all on the same error number. Thus, I get an enormous table which lists
...ANSWER
Answered 2017-Aug-16 at 14:10Without seeing your SQL code:
The first thing you can do is put all the field names in your sqTwo query. You can't use *
which is the wild card for 'All Fields' when you are trying to do a total.
And the other thing you may have to keep in mind (and I'm not sure since you didn't give us your code) is that if you do aggregates of your tables/queries using Group By
in Access, sometimes you have to write the results to a temp table before you can call that dataset into another query. You may not be there yet, but it looks like you are heading in that direction. Just something to be aware of.
Third thing... you might want to consider avoiding the Totals function and use the Group By
functionality with a Sum function. But that may be a 'next level' thing for a beginning SQL programmer.
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Install sqone
Use when ready to deploy to production - minifys files, runs uncss, extracts critical css and generates a sitemap based on files in the src/templates/pages folder.
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