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Why do I need Transaction in Hibernate for read-only operations?
Why do I need Transaction in Hibernate for read-only operations?
4 Answers
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Override devise registrations controller
I have added a field to the sign-up form that is based on a different model, see How do I use nested attributes with the devise model for the gory details. This part is working fine.
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How to check if a table exists in a given schema
...Erwin BrandstetterErwin Brandstetter
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How to remove convexity defects in a Sudoku square?
... it to OpenCV yourself. It's written in Mathematica.
The first step is to adjust the brightness in the image, by dividing each pixel with the result of a closing operation:
src = ColorConvert[Import["http://davemark.com/images/sudoku.jpg"], "Grayscale"];
white = Closing[src, DiskMatrix[5]];
srcAdj...
Understanding implicit in Scala
...Scala playframework tutorial and I came across this snippet of code which had me puzzled:
7 Answers
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When to use the different log levels
...that is diagnostically helpful to people more than just developers (IT, sysadmins, etc.).
Info - Generally useful information to log (service start/stop, configuration assumptions, etc). Info I want to always have available but usually don't care about under normal circumstances. This is my out-of-t...
MyISAM versus InnoDB [closed]
...s which involves a lot of database writes, I'd say ( 70% inserts and 30% reads ). This ratio would also include updates which I consider to be one read and one write. The reads can be dirty (e.g. I don't need 100% accurate information at the time of read).
The task in question will be doing over...
Check synchronously if file/directory exists in Node.js
...ked for a synchronous check, but if you can use an asynchronous check instead (usually best with I/O), use fs.promises.access if you're using async functions or fs.access (since exists is deprecated) if not:
In an async function:
try {
await fs.promises.access("somefile");
// The check suc...
Truly understanding the difference between procedural and functional
...anding the difference between procedural and functional programming paradigms.
9 Answers
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Make Iframe to fit 100% of container's remaining height
...orical reasons.
The trick is to understand what the 100% is taken of. Reading CSS specs can help you there.
To make a long story short - there is such a thing as "containing block" - which is not necessary the parent element. Simply said, it is the first element up the hierarchy that has positio...