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How to create a file in Android?
How to create a file, write data into it and read data from it on Android? If possible provide a code snippet.
4 Answers
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Getting number of elements in an iterator in Python
... you a better way to accomplish your actual goal.
Edit: Using list() will read the whole iterable into memory at once, which may be undesirable. Another way is to do
sum(1 for _ in iterable)
as another person posted. That will avoid keeping it in memory.
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csv.Error: iterator should return strings, not bytes
... Just want to add to this that if you get encoding errors when you try reading/writing from/to a CSV file, adding a particular encoding can help. I just fixed this bug on mine by adding "encoding = 'utf-8'".
– covfefe
Oct 16 '15 at 22:06
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open() in Python does not create a file if it doesn't exist
What is the best way to open a file as read/write if it exists, or if it does not, then create it and open it as read/write? From what I read, file = open('myfile.dat', 'rw') should do this, right?
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Read and parse a Json File in C#
...est part of two days "faffing" about with code samples and etc., trying to read a very large JSON file into an array in c# so I can later split it up into a 2d array for processing.
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Python CSV error: line contains NULL byte
...are unaware what od is or does). Do this:
print repr(open('my.csv', 'rb').read(200)) # dump 1st 200 bytes of file
and carefully copy/paste (don't retype) the result into an edit of your question (not into a comment).
Also note that if the file is really dodgy e.g. no \r or \n within reasonable d...
What is the “volatile” keyword used for?
I read some articles about the volatile keyword but I could not figure out its correct usage. Could you please tell me what it should be used for in C# and in Java?
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Ruby on Rails - Import Data from a CSV file
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require 'csv'
csv_text = File.read('...')
csv = CSV.parse(csv_text, :headers => true)
csv.each do |row|
Moulding.create!(row.to_hash)
end
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i...
How can I overwrite a getter method in an ActiveRecord model?
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The Rails Style Guide recommends using self[:attr] over read_attribute(:attr).
You can use it like this:
def name
name_trans || self[:name]
end
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improve this answer
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How to save a dictionary to a file?
... save_obj seems to require that the file obj/'+ name + '.pkl already exist. I created a dictionary named Q, populated it, and made the call save_obj(Q, "Qtable") I got an error: FileNotFoundError: [Errno 2] No such file or directory: 'obj/Qtable.pkl' How does one create the file in the f...