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Merge / convert multiple PDF files into one PDF
...no other pdf exists in that directory and their order is preserved by "*". If its not preserved, using ranges: filename_{0..9}.pdf solves it.
– lepe
Jan 5 '15 at 5:48
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How does python numpy.where() work?
..., True, True]], dtype=bool)
This is the same reason why something like if x > 5: raises a ValueError if x is a numpy array. It's an array of True/False values, not a single value.
Furthermore, numpy arrays can be indexed by boolean arrays. E.g. x[x>5] yields [6 7 8], in this case.
Hones...
Count how many records are in a CSV Python?
...akes for an efficient counter, avoiding storing the whole file in memory.
If you already read 2 rows to start with, then you need to add those 2 rows to your total; rows that have already been read are not being counted.
sh...
Multiple dex files define Landroid/support/v4/accessibilityservice/AccessibilityServiceInfoCompat
If I run gradle assembleDebug from the command line, I am suddenly getting this error:
26 Answers
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How do I convert a Vector of bytes (u8) to a string
...s not require an allocation. You can create a String from the string slice if necessary by calling .to_owned() on the string slice (other options are available).
The library reference for the conversion function:
std::str::from_utf8
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'Incomplete final line' warning when trying to read a .csv file into R
...incomplete final line" is a warning (not an error) that can pop up due to different causes. In your case that's the lack of a final EOL. There's no way that in your case the warning was thrown by the function readTableHeader, because that one doesn't read the final line. Hence your problem is not th...
JsonMappingException: No suitable constructor found for type [simple type, class ]: can not instanti
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If you don't want to add default constructor (e.g., when you are dealing with immutable objects). You will have to tell which constructor or factory method to use to instantiate the object using JsonCreator annotation.
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Why does String.valueOf(null) throw a NullPointerException?
... is overloaded:
String.valueOf(Object)
String.valueOf(char[])
Java Specification Language mandates that in these kind of cases, the most specific overload is chosen:
JLS 15.12.2.5 Choosing the Most Specific Method
If more than one member method is both accessible and applicable to a method...
Convert a list of characters into a string
If I have a list of chars:
9 Answers
9
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Class method decorator with self arguments?
...an pass in the attribute name as a string to the decorator and use getattr if you don't want to hardcode the attribute name:
def check_authorization(attribute):
def _check_authorization(f):
def wrapper(self, *args):
print getattr(self, attribute)
return f(self, *...