Switch

Μεταγραφή RNA
Μεταγραφή RNA στη διαδρομή Zig 
const std = @import("std");
const mem = std.mem;

pub fn toRna(allocator: mem.Allocator, dna: []const u8) mem.Allocator.Error![]const u8 {
    var rna_slice = try allocator.alloc(u8, dna.len);
    for (dna, 0..) |dna_nucleotide, i| {
        switch (dna_nucleotide) {
            'A' => rna_slice[i] = 'U',
            'C' => rna_slice[i] = 'G',
            'G' => rna_slice[i] = 'C',
            'T' => rna_slice[i] = 'A',
            else => unreachable,
        }
    }
    return rna_slice;
}

A switch maps each of the four DNA bases to its RNA complement.

The else => unreachable prong states that no other byte can occur. unreachable is an assertion: in safe build modes reaching it panics, and in ReleaseFast/ReleaseSmall it is undefined behavior the optimizer may assume never happens. The exercise's inputs only ever contain A, C, G, and T, so the prong is never taken.

Translation missing: el.number.nth.ordinalized Sep 2026 · Σου φάνηκε χρήσιμη;

Άλλες προσεγγίσεις για την άσκηση Μεταγραφή RNA στη διαδρομή Zig

Άλλοι τρόποι με τους οποίους η κοινότητά μας έλυσε αυτή την άσκηση
const complement = blk: {
    var table: [256]u8 = undefined;
    table['A'] = 'U';
    table['C'] = 'G';
    table['G'] = 'C';
    table['T'] = 'A';
    break :blk table;
};
Lookup table

Precompute a 256-byte table and index it by each nucleotide. 

fn transcribeBlock(block: Block) Block {
    var rna: Block = block;
    rna = @select(u8, block == @as(Block, @splat('A')), @as(Block, @splat('U')), rna);
    rna = @select(u8, block == @as(Block, @splat('C')), @as(Block, @splat('G')), rna);
    rna = @select(u8, block == @as(Block, @splat('G')), @as(Block, @splat('C')), rna);
    rna = @select(u8, block == @as(Block, @splat('T')), @as(Block, @splat('A')), rna);
    return rna;
}
SIMD

Transcribe a whole block of nucleotides at once with vector operations.