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How to read a large file - line by line?
I want to iterate over each line of an entire file. One way to do this is by reading the entire file, saving it to a list, then going over the line of interest. This method uses a lot of memory, so I am looking for an alternative.
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Spring - @Transactional - What happens in background?
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This is a big topic. The Spring reference doc devotes multiple chapters to it. I recommend reading the ones on Aspect-Oriented Programming and Transactions, as Spring's declarative transaction support uses AOP at its foundation.
But at a very high level, Spring crea...
What are the differences between the threading and multiprocessing modules?
... little slower, because there's extra overhead from threading, even if you don't have any shared data, but ignore that for now.)
There are exceptions to this. If your code's heavy computation doesn't actually happen in Python, but in some library with custom C code that does proper GIL handling, li...
How do I include a pipe | in my linux find -exec command?
This isn't working. Can this be done in find? Or do I need to xargs?
6 Answers
6
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How do I execute a bash script in Terminal?
...g. with the cd /path/to command, you can enter ./script to run your script.Don't forget, in this case the './' before 'script'
– FrViPofm
Dec 28 '19 at 10:59
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Do I really have a car in my garage? [duplicate]
...AfterYears on a Vehicle without caring about the implementation.
Usually, downcasting is a sign of a flawed design: do not store your vehicles all together if you need to differenciate their actual type.
Note: of course the design here can be easily improved. It is just an example to demonstrate t...
how do i do an insert with DATETIME now inside of SQL server mgmt studio
I have a website that does inserts into this table below. I need to do some manual inserts but I wasn't sure how do pass in the equivalent of DateTime.Now in C#.
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How to set commands output as a variable in a batch file
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FOR /F "tokens=* USEBACKQ" %%F IN (`command`) DO (
SET var=%%F
)
ECHO %var%
I always use the USEBACKQ so that if you have a string to insert or a long file name, you can use your double quotes without screwing up the command.
Now if your output will contain multiple l...
Assign variable in if condition statement, good practice or not? [closed]
...example, when you see this:
if (value = someFunction()) {
...
}
you don't know if that's what they meant to do, or if they intended to write this:
if (value == someFunction()) {
...
}
If you really want to do the assignment in place, I would recommend doing an explicit comparison as we...
Java Generics: Cannot cast List to List? [duplicate]
...));
DataNode node = a1.get(0);
What would you expect to happen?
You can do this:
List<DataNode> a1 = new ArrayList<DataNode>();
List<? extends Tree> b1 = a1;
... because then you can only fetch things from b1, and they're guaranteed to be compatible with Tree. You can't call ...