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Simple explanation of MapReduce?
...e reduced to a scalar value.
So if you think of it like a SQL statement
SELECT SUM(salary)
FROM employees
WHERE salary > 1000
GROUP by deptname
We can use map to get our subset of employees with salary > 1000
which map emits to the barrier into group size buckets.
Reduce will sum each of...
Detect iPad Mini in HTML5
...by using these methods.
For the best possible browsing experience, please select what device you are using below.
This choice will be stored for future visits to the website on this device.
[] iPad 2
[*] iPad mini
[] Ancient blackberry device
"
I am not entirely familiar with what you can and...
Why is String immutable in Java?
...iew and waiting for result.If the answer told them is right then I will be selected
– rocking
Mar 14 '14 at 6:56
1
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How do I set the maximum line length in PyCharm?
...ode style->python : ensure right margin is not exceeded. Once this was selected the reformat would work.
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Is Using .NET 4.0 Tuples in my C# Code a Poor Design Decision?
...pport for tuples in C#:
private var GetDesserts()
{
return _icecreams.Select(
i => new { icecream = i, topping = new Topping(i) }
);
}
public void Eat()
{
foreach (var dessert in GetDesserts())
{
dessert.icecream.AddTopping(dessert.topping);
dessert.Eat()...
How many bytes does one Unicode character take?
...fer UTF-16 over UTF-8, for instance. Developers of different software may select different encodings based upon which Unicode characters are more likely to be used. In China/Japan for instance, UTF-16 (2-bytes) makes more sense than UTF-8 for them, because the same characters often would need twice...
Mapping composite keys using EF code first
...f(ColumnAttribute.Order))
.TypedValue.Value ?? 0)
.Select(x => x.Name)
.ToArray();
// apply the keys to the model builder
modelBuilder.Entity(entity.ClrType).HasKey(orderedKeys);
}
I haven't fully tested this in all situations, but it works in my basic t...
HTML table with 100% width, with vertical scroll inside tbody [duplicate]
...o Width Columns
Here is the jQuery version of above logic:
// Change the selector if needed
var $table = $('table'),
$bodyCells = $table.find('tbody tr:first').children(),
colWidth;
// Get the tbody columns width array
colWidth = $bodyCells.map(function() {
return $(this).width();
})....
How can I pair socks from a pile efficiently?
...d for other colors in everyday's life» A good standard rule for easy sock selection is actually that they should match either the color of your trousers or the color of your belt. For this reason, the most commonly used colors will likely be black, blue, gray and some brown. It's hard to believe on...
Find unique rows in numpy.array
...
As of NumPy 1.13, one can simply choose the axis for selection of unique values in any N-dim array. To get unique rows, one can do:
unique_rows = np.unique(original_array, axis=0)
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