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Automate ssh-keygen -t rsa so it does not ask for a passphrase
I need to automate ssh-keygen -t rsa with out a password i.e. enter at the prompt.
How can I do that from a shell script?
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Python's “in” set operator
... also means hash(b) == hash(x), so equality of the items isn't enough to make them the same.
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How to determine the encoding of text?
I received some text that is encoded, but I don't know what charset was used. Is there a way to determine the encoding of a text file using Python? How can I detect the encoding/codepage of a text file deals with C#.
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How do you concatenate Lists in C#?
...nswered Jun 25 '09 at 4:45
John KugelmanJohn Kugelman
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Using the Swift if let with logical AND operator &&
We know that we can use an if let statement as a shorthand to check for an optional nil then unwrap.
6 Answers
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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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When I catch an exception, how do I get the type, file, and line number?
Catching an exception that would print like this:
4 Answers
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How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
...te a single expression that returns these two dictionaries, merged (i.e. taking the union). The update() method would be what I need, if it returned its result instead of modifying a dictionary in-place.
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pandas three-way joining multiple dataframes on columns
...on. If I have more than a handful of dataframes, I'd put them in a list like this (generated via list comprehensions or loops or whatnot):
dfs = [df0, df1, df2, dfN]
Assuming they have some common column, like name in your example, I'd do the following:
df_final = reduce(lambda left,right: pd.m...
Why are variables “i” and “j” used for counters?
I know this might seem like an absolutely silly question to ask, yet I am too curious not to ask...
23 Answers
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