What is the fastest way of converting an array of floats to string? [duplicate]

This question already has answers here: Convert a list<int> to a join开发者_运维问答ed string of ints? (2 answers) Closed 6 years ago.

What is the fastest way of converting an array of floats into string in C#?

If my array contains this { 0.1, 1.1, 1.0, 0.2 }

Then I want each entry to converted to a string with value separated by a white space, i.e. "0.1 1.1 1.0 0.2"

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I would go for the most readable string.Join which also should have sufficient performance in most cases. Unless there is a real issue, I would not run my own:

float[] values = { 1.0f, 2.0f, 3.0f };
string s = string.Join(" ", values);

It might be that I misread your question, so in case you want an enumeration of string go with the other answers.

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To be more explicit, call float.ToString() manually and then string.Join() to separate each result with a space:

var array = new float[] { 0.1, 1.1, 1.0, 0.2 };
string result = String.Join(" ", array.Select(f => f.ToString(CultureInfo.CurrentCulture));

btw,

in .NET 2.0/3.0/3.5 there only single String.Join(string, string[])

but in .NET 4.0 there is also String.Join<T>(string, IEnumerable<T>)

@0xA3 uses method from .NET 4.0. Mine too. So for earlier versions use array.Select(..).ToArray()

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You can do it like this:

var floatsAsString = yourFloatArray.Select(f => f.ToString(CultureInfo.CurrentCulture));

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float[] arr = { 1.0f, 2.1f };
var str = arr.Select(x => x.ToString()).ToArray();

or use rray.ConvertAll

public static string FloatFToString(float f)
{
    return f.ToString(); 
}

float[] a = { 1.0f, 2.1f };
var res = Array.ConvertAll(a, new Converter<float, string>(FloatFToString));

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I like approach with using Enumerable.Aggregate method:

float[] array = new float[] { .1f, .2f, .3f, .4f, .5f };
string s = array.AsEnumerable().Aggregate<float, string, string>("", (a, e) => a += string.Format(" {0}", e), r => r.Trim());

Works fast.