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How can I open multiple files using “with open” in Python?
...one time, iff I can write to all of them. I'm wondering if I somehow can combine the multiple open calls with the with statement:
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How can I read a large text file line by line using Java?
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A common pattern is to use
try (BufferedReader br = new BufferedReader(new FileReader(file))) {
String line;
while ((line = br.readLine()) != null) {
// process the line.
}
}
You can read the data faster i...
How do I add the contents of an iterable to a set?
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What is the use case of noop [:] in bash?
...forever'
done
It's traditional to use : when the shell syntax requires a command but you have nothing to do.
while keep_waiting; do
: # busy-wait
done
The : builtin dates all the way back to the Thompson shell, it was present in Unix v6. : was a label indicator for the Thompson shell's goto s...
Converting string to byte array in C#
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110
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Get record counts for all tables in MySQL database
... @krunalshah, This is one of the restrictions of InnoDB. See dev.mysql.com/doc/refman/5.0/en/innodb-restrictions.html, section Restrictions on InnoDB Tables, for more info. You could always use a SELECT COUNT(*) FROM t, which however, is a lot slower
– Marking
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Make sure only a single instance of a program is running
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Why doesn't java.lang.Number implement Comparable? [duplicate]
Does anyone know why java.lang.Number does not implement Comparable ? This means that you cannot sort Number s with Collections.sort which seems to me a little strange.
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INSERT IF NOT EXISTS ELSE UPDATE?
...s different than "insert or update". For a valid answer, see stackoverflow.com/questions/418898/…
– rds
Nov 12 '12 at 19:34
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Add text to Existing PDF using Python
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I recommend using PyPDF2 since it is more updated, also check their sample code: github.com/mstamy2/PyPDF2/blob/…
– blaze
Apr 23 '15 at 4:06
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