Can I simplify this?

import crafttweaker.block.IBlock;
import crafttweaker.block.IBlockDefinition;
import crafttweaker.block.IBlockProperties;

import crafttweaker.item.IItemStack;
import crafttweaker.item.IItemDefinition;

//0.2
val HB2 = [
    <minecraft:tallgrass:*>,
    <minecraft:deadbush>,
    <minecraft:double_plant:*>
] as IItemStack[];
//2
val HB20 = [
    <minecraft:grass>,
    <minecraft:dirt>,
    <minecraft:grass_path>,
    <minecraft:farmland>//,
    //<minecraft:double_plant:*>
] as IItemStack[];
//3
val HB30 = [
    <minecraft:log:*>,
    <minecraft:log2:*>
] as IItemStack[];
val HB50 = [] as IItemStack[];


//blocks harder to break
for block in HB2{
    block.hardness = 0.2;
}
for block in HB20{
    block.hardness = 2.0;
}
for block in HB30{
    block.hardness = 3.0;
}
for block in HB50{
    block.hardness = 5.0;
}