How to pass an array to a shader?

Starting with Unity 5.4, there is native "arrays in shaders" support. Material.SetFloatArray, Shader.SetGlobalFloatArray, MaterialPropertyBlock.SetFloatArray

Currently that is possible, but cumbersome. E.g. in the shader, you can do float myarray[100], and then that becomes individual float material properties (myarray0, myarray1, .., myarray99) that can be set from scripting. So cumbersome + somewhat high overhead of applying them one by one internally.

For example, take this shader code

 Shader "Custom/ArrayTest" {
     Properties {
     }
     SubShader {
         Tags { "RenderType"="Opaque" }
         LOD 200
         
         CGPROGRAM
         #pragma surface surf Standard fullforwardshadows
         #pragma target 3.0
 
         float myarray[3];
 
         struct Input {
             float2 uv_MainTex;
         };
 
         void surf (Input IN, inout SurfaceOutputStandard o) {
             o.Albedo = float3(myarray[0], myarray[1], myarray[2]);
         }
         ENDCG
     } 
     FallBack "Diffuse"
 }
 

And a script to test it. Must be placed on the same object.

 using UnityEngine;
 using System.Collections;
 
 public class Test : MonoBehaviour {
 
     void Awake() {
         var material = GetComponent<Renderer>().sharedMaterial;
         material.SetFloat("myarray0", 1);
         material.SetFloat("myarray1", 1);
         material.SetFloat("myarray2", 0);
     }
 }
 

Hope in the future Unity will add proper arrays support.