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Apply multiple functions to multiple groupby columns
... a b c d group
0 0.418500 0.030955 0.874869 0.145641 0
1 0.446069 0.901153 0.095052 0.487040 0
2 0.843026 0.936169 0.926090 0.041722 1
3 0.635846 0.439175 0.828787 0.714123 1
A dictionary mapped from column names to aggregation fun...
How to write a large buffer into a binary file in C++, fast?
...;
#include <iostream>
#include <cassert>
std::vector<uint64_t> GenerateData(std::size_t bytes)
{
assert(bytes % sizeof(uint64_t) == 0);
std::vector<uint64_t> data(bytes / sizeof(uint64_t));
std::iota(data.begin(), data.end(), 0);
std::shuffle(data.begin(), da...
Node.js Mongoose.js string to ObjectId function
... mongoose = require('mongoose');
var id = mongoose.Types.ObjectId('4edd40c86762e0fb12000003');
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“Incorrect string value” when trying to insert UTF-8 into MySQL via JDBC?
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edited Jul 6 '17 at 18:47
Ezekiel Victor
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How to Load an Assembly to AppDomain with all references recursively?
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69
You need to invoke CreateInstanceAndUnwrap before your proxy object will execute in the foreign...
Is there a difference between x++ and ++x in java?
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Select distinct values from a table field
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206
Say your model is 'Shop'
class Shop(models.Model):
street = models.CharField(max_length=150...
C# 4 default parameter values: How to assign a default DateTime/object value? [duplicate]
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Why #define TRUE (1==1) in a C boolean macro instead of simply as 1?
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156
This approach will use the actual boolean type (and resolve to true and false) if the compiler s...
Changing java platform on which netbeans runs
I am using Netbeans 6.7. I had first installed Java 1.5 before installing Netbeans. When i installed Netbeans it took Java 1.5 as the default version. Then i installed Java 1.6 on my machine. I need to change the default JDK of my netbeans to 1.6 not only to a specific project but to the whole Netbe...