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How does Hadoop process records split across block boundaries?
...ils and here are my thoughts. The splits are handled by the client by InputFormat.getSplits, so a look at FileInputFormat gives the following info:
For each input file, get the file length, the block size and calculate the split size as max(minSize, min(maxSize, blockSize)) where maxSize correspon...
For i = 0, why is (i += i++) equal to 0?
...e run-time processing of a postfix increment or decrement operation of the form x++ or x-- consists of the following steps:
If x is classified as a variable:
x is evaluated to produce the variable.
The value of x is saved.
The selected operator is invoked with the saved value of ...
What is the difference between JSF, Servlet and JSP?
...ts (beans) or
Enterprise JavaBeans components
(enterprise beans) to perform
processing on the server. As such, JSP
technology is a key component in a
highly scalable architecture for
web-based applications.
See https://jcp.org/en/introduction/faq
A: JavaServer Faces technology is a...
How can I create a correlation matrix in R?
...) #package corrplot
corrplot(M, method = "circle") #plot matrix
More information here: http://cran.r-project.org/web/packages/corrplot/vignettes/corrplot-intro.html
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How is a CRC32 checksum calculated?
...re $1+1=0$. By putting the cofficients be in a field, then the polynomials form what is called a Euclidean Domain, which basically just allows what we're trying to do to be well-defined in the first place.
– calavicci
Nov 10 '15 at 23:11
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how do you filter pandas dataframes by multiple columns
...aFrame): dataframe
filter_values (None or dict): Dictionary of the form:
`{<field>: <target_values_list>}`
used to filter columns data.
"""
import numpy as np
if filter_values is None or not filter_values:
return df
return df[
...
Which is faster/best? SELECT * or SELECT column1, colum2, column3, etc
...
It still matters, because the select list is a form of contract, expecially if the SQL is in a stored procedure.
– Eric Z Beard
Sep 15 '08 at 23:22
4
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What’s the best RESTful method to return total number of items in an object?
...lts. So to respect that, I think we should use headers to transmit other informations like total, next page token and previous page token. I never tried it and I need advice from other developers.
– Loenix
Oct 24 '16 at 6:55
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c++11 Return value optimization or move? [duplicate]
...s doesn't disable copy elision, it disables return value optimisation. The former is a language rule that you cannot "disable"; the latter is an optimisation that takes advantage of this rule. Indeed, my entire point was that even if return value optimisation isn't used, you still get to use move se...
Why does ~True result in -2?
...ue is not this is because bool is a subclass of int @ Martijn added this information in his answer.
– Grijesh Chauhan
Feb 19 '14 at 13:35
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