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How to sum up elements of a C++ vector?
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Actually there are quite a few methods.
int sum_of_elems = 0;
C++03
Classic for loop:
for(std::vector<int>::iterator it = vector.begin(); it != vector.end(); ++it)
sum_of_elems += *it;
Using a standard algorithm:
#include <numeric>
sum_of_elems = std::accu...
How to read the mode field of git-ls-tree's output
... The following flags are defined for the st_mode field:
S_IFMT 0170000 bit mask for the file type bit fields
S_IFSOCK 0140000 socket
S_IFLNK 0120000 symbolic link
S_IFREG 0100000 regular file
S_IFBLK 0060000 block device
S_IFDIR ...
Calculating how many minutes there are between two times
... you trying 'span.Minutes', this will return only the minutes of timespan [0~59], to return sum of all minutes from this interval, just use 'span.TotalMinutes'.
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MySQL stored procedure vs function, which would I use when?
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105
You can't mix in stored procedures with ordinary SQL, whilst with stored function you can.
e.g...
How to “re-run with -deprecation for details” in sbt?
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edited Mar 13 '19 at 10:16
Jacek Laskowski
61.1k2020 gold badges187187 silver badges343343 bronze badges
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How can I divide two integers to get a double?
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answered Mar 19 '09 at 4:14
NoahDNoahD
7,02244 gold badges2222 silver badges2828 bronze badges
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How do different retention policies affect my annotations?
...urce:
The old URL is dead now
hunter_meta and replaced with hunter-meta-2-098036. In case even this goes down, I am uploading the image of the page.
Image (Right Click and Select 'Open Image in New Tab/Window')
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New line in Sql Query
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Pinal Dave explains this well in his blog.
http://blog.sqlauthority.com/2009/07/01/sql-server-difference-between-line-feed-n-and-carriage-return-r-t-sql-new-line-char/
DECLARE @NewLineChar AS CHAR(2) = CHAR(13) + CHAR(10)
PRINT ('SELECT FirstLine AS FL ' + @NewLineChar + 'SELECT SecondLine AS SL'...
How to split/partition a dataset into training and test datasets for, e.g., cross validation?
...k of the indices:
import numpy
# x is your dataset
x = numpy.random.rand(100, 5)
numpy.random.shuffle(x)
training, test = x[:80,:], x[80:,:]
or
import numpy
# x is your dataset
x = numpy.random.rand(100, 5)
indices = numpy.random.permutation(x.shape[0])
training_idx, test_idx = indices[:80], ind...
How to get a list of installed android applications and pick one to run
...gAppsList = context.getPackageManager().queryIntentActivities( mainIntent, 0);
You will get all the necessary data in the ResolveInfo to start a application. You can check ResolveInfo javadoc here.
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