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Linking R and Julia?
...("sqrt", 2)
julia_eval("sqrt")(2)
As you can see, you could send command strings and call Julia functions really easily.
And there are also some R packages wrapping Julia packages using JuliaCall, for example,
convexjlr for Disciplined Convex Programming in R using Convex.jl, which is also on ...
Dictionary vs Object - which is more efficient and why?
...RESULT=None
def makeL(i):
# Use this line to negate the effect of the strings on the test
# return "Python is smart and will only create one string with this line"
# Use this if you want to see the difference with 5 million unique strings
return "This is a sample string %s" % i
d...
How to split a file into equal parts, without breaking individual lines? [duplicate]
...
var dict = File.ReadLines("test.txt")
.Where(line => !string.IsNullOrWhitespace(line))
.Select(line => line.Split(new char[] { '=' }, 2, 0))
.ToDictionary(parts => parts[0], parts => parts[1]);
or
enter code here
line="to=xxx@gmail...
How can I clear or empty a StringBuilder? [duplicate]
I'm using a StringBuilder in a loop and every x iterations I want to empty it and start with an empty StringBuilder , but I can't see any method similar to the .NET StringBuilder.Clear in the documentation, just the delete method which seems overly complicated.
...
What's the difference between an inverted index and a plain old index?
... in order for the words to have meaning. If, as a culture, we decided to flip left and right, then you'd have the same issue figuring out what a "right turn" vs a "left turn" is since the agreed upon meaning had changed. However, the naming is arbitrary, so which one is which (in and of itself) does...
与复制构造函数相关的错误.例如:0x77D9FCAA (ntdll.dll) (prog31.exe 中)处...
...含指针成员，没有复制构造函数出错
struct Node
{
Node(char *n="",int a = 0)
{
name = strdup(n);
strcpy(name,n);
age = a ;
}
~Node()
{
delete[] name;
}
char *name;
int age;
};
int main()
{
Node node1("Roger",20),node2(node1);
//pri...
Measuring execution time of a function in C++
...usage:
#include <iostream>
#include <algorithm>
typedef std::string String;
//first test function doing something
int countCharInString(String s, char delim){
int count=0;
String::size_type pos = s.find_first_of(delim);
while ((pos = s.find_first_of(delim, pos)) != String:...
convert a list of objects from one type to another using lambda expression
....
List<char> c = new List<char>() { 'A', 'B', 'C' };
List<string> s = c.Select(x => x.ToString()).ToList();
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What's the difference between a temp table and table variable in SQL Server?
... to encapsulate and reuse logic much easier (eg make a function to split a string into a table of values on some arbitrary delimiter).
Using Table Variables within user-defined functions enables those functions to be used more widely (see CREATE FUNCTION documentation for details). If you're writing...
Determine a string's encoding in C#
Is there any way to determine a string's encoding in C#?
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