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How to compare two floating point numbers in Bash?
I am trying hard to compare two floating point numbers within a bash script. I have to variables, e.g.
17 Answers
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Java regular expression OR operator
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You can just use the pipe on its own:
"string1|string2"
for example:
String s = "string1, string2, string3";
System.out.println(s.replaceAll("string1|string2", "blah"));
Output:
blah, blah, string3
The main reason to use parentheses is t...
How do I dump the data of some SQLite3 tables?
... you could also write < database.sql grep '^INSERT' ... but an explicit pipe is much easier to read.
– rjh
Feb 15 '16 at 14:49
1
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Why is it said that “HTTP is a stateless protocol”?
...rotocols at different layers in the stack. You could serve HTTP over named pipes if you wanted, or even by sending files around, if you got enough masochists to agree to do it, and it would work precisely because HTTP is transport-protocol-agnostic. At that level, it's all just requests and response...
Copying files from host to Docker container
I am trying to build a backup and restore solution for the Docker containers that we work with.
41 Answers
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Implement Stack using Two Queues
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push:
enqueue in queue1
pop:
while size of queue1 is bigger than 1, pipe dequeued items from queue1 into queue2
dequeue and return the last item of queue1, then switch the names of queue1 and queue2
Version B (efficient pop):
push:
enqueue in queue2
enqueue all items of queue1 in queue...
How to list variables declared in script in bash?
In my script in bash, there are lot of variables, and I have to make something to save them to file.
My question is how to list all variables declared in my script and get list like this:
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How to terminate a Python script
I am aware of the die() command in PHP which exits a script early.
10 Answers
10
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How to check version of python modules?
...ages and their versions with
pip freeze
In most linux systems, you can pipe this to grep(or findstr on Windows) to find the row for the particular package you're interested in:
Linux:
$ pip freeze | grep lxml
lxml==2.3
Windows:
c:\> pip freeze | findstr lxml
lxml==2.3
For an individual mo...
How to upgrade all Python packages with pip?
...lt;(pip3 freeze) --upgrade Effectively, <(pip3 freeze) is an anonymous pipe, but it will act as a file object
– Sergiy Kolodyazhnyy
Sep 3 '18 at 22:17
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