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What is the difference between i++ and ++i?
...like to know when to use i++ or ++i ( i being a number variable like int , float , double , etc). Anyone who knows this?
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Generate fixed length Strings filled with whitespaces
...we can use the method java.lang.String.format(String, Object...) and use printf like format.
The format string "%1$15s" do the job. Where 1$ indicates the argument index, s indicates that the argument is a String and 15 represents the minimal width of the String.
Putting it all together: "%1$15s".
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How to get whole and decimal part of a number?
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As a side, intval() or simple casting as (int) might be more performant than floor()
– Jason McCreary
Jul 8 '11 at 2:36
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Check if two unordered lists are equal [duplicate]
...ype for an unordered collection of (hashable) things, called a set. If you convert both lists to sets, the comparison will be unordered.
set(x) == set(y)
Documentation on set
EDIT: @mdwhatcott points out that you want to check for duplicates. set ignores these, so you need a similar data struc...
Automatically expanding an R factor into a collection of 1/0 indicator variables for every factor le
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And if you want to convert all factor columns, you can use: model.matrix(~., data=iris)[,-1]
– user890739
Jan 5 '16 at 0:32
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Returning a value from thread?
... thread finishes
//(because of obtaining the value of the Result property)
int result = Task.Factory.StartNew(() => {
//Some work...
return 42;}).Result;
.NET 4.5+:
Starting with .NET 4.5 you could also use async/await keywords to return value from task directly instead of obtaining Re...
What is the best way to give a C# auto-property an initial value?
...ince C# 6.0, you can specify initial value in-line. The syntax is:
public int X { get; set; } = x; // C# 6 or higher
DefaultValueAttribute is intended to be used by the VS designer (or any other consumer) to specify a default value, not an initial value. (Even if in designed object, initial value...
Why is transposing a matrix of 512x512 much slower than transposing a matrix of 513x513?
...ze of 64 bytes. Each line can hold 8 of the elements in the matrix (64-bit int).
The critical stride would be 2048 bytes, which correspond to 4 rows of the matrix (which is continuous in memory).
Assume we're processing row 28. We're attempting to take the elements of this row and swap them with...
Pass Array Parameter in SqlCommand
...ar parameters = new string[items.Length];
var cmd = new SqlCommand();
for (int i = 0; i < items.Length; i++)
{
parameters[i] = string.Format("@Age{0}", i);
cmd.Parameters.AddWithValue(parameters[i], items[i]);
}
cmd.CommandText = string.Format("SELECT * from TableA WHERE Age IN ({0})", s...
Python JSON serialize a Decimal object
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Hmm, for me this converts Decimal objects to floats, which is not acceptable. Loss of precision when working with currency, for instance.
– Matthew Schinckel
Oct 22 '10 at 0:12
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