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How to concatenate strings and ints natively?


How to concatenate strings and ints natively?

By : user2950769
Date : November 17 2020, 11:58 AM
it helps some times The shortest (cleanest) way I have found so far to concatenate strings with ints in Go is the following: , This'll do the trick (it uses reflection though):
code :
str := fmt.Sprintf("blah %d blah", 42)


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Is it more efficient to compare ints and ints or strings and strings

Is it more efficient to compare ints and ints or strings and strings


By : YLWS
Date : March 29 2020, 07:55 AM
With these it helps A few comments mentioned running a profiling tool to prove which has better performance.
This is a ok, but the simplest way to check performance of specific statements is to put them in a loop and use the Stopwatch class.
code :
    System.Diagnostics.Stopwatch sw=new System.Diagnostics.Stopwatch();


    int a  = 5;
    string b = "5";

    sw.Start();

    for (int i=0;i<1000000;i++)
    {
        if(a == int.Parse(b))
        {

        } 
    }

    sw.Stop();

    Console.WriteLine("a == int.Parse(b) milliseconds: " + sw.ElapsedMilliseconds);

    sw.Reset();

    sw.Start();

    for (int i=0;i<1000000;i++)
    {
        if(a.ToString() == b)
        {

        }       
    }       

    sw.Stop();

    Console.WriteLine("a.ToString() == b milliseconds: " + sw.ElapsedMilliseconds);
concatenate strings based on ints from a list

concatenate strings based on ints from a list


By : nik
Date : March 29 2020, 07:55 AM
This might help you I had a similar question here but it's a different issue. I have two lists. list0 is a list of strings and list1 is a list of lists consisting of ints. , Use list comprehensions and str.join():
code :
new_list = [''.join([list0[i] for i in indices]) for indices in list1]
>>> list0 = ["Test", "Test2", "More text", "Test123", "ttt", "abc", "okokok", "Hello"]
>>> list1 = [ [0, 1], [2], [3], [4,5,6], [7]]
>>> [''.join([list0[i] for i in indices]) for indices in list1]
['TestTest2', 'More text', 'Test123', 'tttabcokokok', 'Hello']
Why is math.pow not natively able to deal with ints? (floor/ceil, too)

Why is math.pow not natively able to deal with ints? (floor/ceil, too)


By : John
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , java.lang.Math is just a port of what the C math library does.
For C, I think it comes down to the fact that CPU have special instructions to do Math.pow for floating point numbers (but not for integers).
A variadic function that accepts Strings and Ints, Format the latter and concatenate all?

A variadic function that accepts Strings and Ints, Format the latter and concatenate all?


By : JQer
Date : March 29 2020, 07:55 AM
should help you out Mixing other two solutions (the recursive one from Passer By and the C++17 fold expression one from Nick Mertin), you can write CreateMessage() without recursion (in a simil-fold expression way) also in C++11
code :
std::string const & getStr (std::string const & ret)

 { return ret; }

std::string getStr (int val)
 {
   std::ostringstream ret;

   ret << std::hex << std::setw(4) << std::setfill('0') << val;

   return ret.str();
 }

template <typename ... Ts>
std::string CreateMessage (Ts const & ... args)
 {
   using unused = int[];

   std::string ret   = "";
   std::string comma = "";

   (void)unused { 0, ( ret += comma + getStr(args), comma = ",", 0 )... };

   return ret;
 }
(void)unused { 0, ( ret += comma + getStr(args), comma = ",", 0 )... };
( ret += comma + getStr(args), comma = ",", 0 )
Reason for the inability to concatenate strings and ints in Python

Reason for the inability to concatenate strings and ints in Python


By : ColorGap
Date : March 29 2020, 07:55 AM
Hope this helps It is well documented in numerous that str is required to convert ints to strings before they can be concatenated: , you can use "," instead of "+" :
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