Letter counter using Ruby

word_count.rb

def letter_count(str)
  counts = {}
  str.each_char do |char|
    next if char == " "
    counts[char] = 0 unless counts.include?(char)
    counts[char] += 1
  end
  puts counts.sort_by {|k,v| v}.reverse
end

letter_count('hayjfltwmnlstaddvdkabpggxpcbmykiymbyphllzozvwjlkqrmaoxnsxqxjhvyrjykaddsoedcyitmevubhgelbmrtk_kxdizfgagidqvbvqrkhwscpenkdqatrcrhbucwmsv_qbygnjsydpr_mqftjviinseckyllydrbmsmyjaszwkdhnpjtk_awdokmpx_fzekzkttovqlfkqvwjbexvzwlnzaqwg_pqlorsmb_mavbuegnsvxptvbgcvairgdgsccac_ug_hbnkbu_svcbrjewiloukndywehdopjckulwwidrycoxsrpngacezescjtcutprmybxdivulcn_znajvbauio_jyahxxnyeyyznkoosgucjlzyqsptpbucirirywbpryjpktw_vl_unycyosq__alklnzv_qkpslqckzmuqbqfjiztsmskqdyxshhxkslvwx_bhaa_opivrqiandjfeyvowrnyysfaem_cgcvxuohpo__umqvbuqnrtcyijtrqsrfjpglsenwypljqixyjvkhogujuljtlowqghlwoonctrkcfwbzqqtqtmzef_elmbybryfiego_jknatrcrtecihdjsjzsytgpcomxkyduygnivcnq_gftnoc_tktdzuubehdjagd_caudrtgujkjzmhxdpvqsg_wyemsrvsdweyclxyhpqeeaphsyhahbbguogsuxsgtzaxktglhxg_xzeqjgmzhpmwfzwpufnrvdnkoyyrdqiwvxflndssbmanersenhltqtmvcmexdusczopalyxgqmopkedsvoszbu_sefquucivicerrnigkutzdojtnqtrfmocyjqs_b_eiqoncrudjccjnwhkjmmaanjsvkycryhxyyhimiebzoukiffcabhlujcwzfnhzlnhdvxyfxarcsqqjwgtbcugqftxrtqrspmpzczbrxpmrlqjqvqaylgvfhxezasdfrarlfxfrbofetptkljmztwvpwrswhmxhsny_bmlkxvyp_pendkcovvsfgkpjirrt_yhue_tgvkggz_shj_aldhfrvcfqxktkxyafaltwqzxoliocjitcikomih_mgygwvxvupgstjpfzbajdmjulbq_trsorfhfpulxnvdeoavcradzphqlngfi_on_kvllspucpxdamnws_ewgxalrlajoeaxxqqondjygfvqfa_ieuuemlozh_qyktxpypmmgou_izoroouiisnpsquplvapnqrmrecjilm_esnsz_steohcisskjioezirv_wlmoipuevrtwthybtrjqpuhuoacmnakhbikccacxb_eicdzwgwfmcdqet_fjum_zkbcokewropykow_cmfkpwuagxgxyfohejmxasb_lzxyzax_bgzjxsb_ollvzqwpyyndezpitwzdeeqthmrhqrhpzwxvdvliycsjiueoxrevkx_gjtpiowhpnit_rdwkocfxvivkfqkom_tjoimirz_ypyufouphocswbzfdprbiirfntvxtvytxgzwjaysxhptbenatxiaxwutrmiwbifqmpkwpmzmlkfzqnprskfsuvnphrbxysufcckssxwcbvapxbkfmum_meucimvshsawiucmimicnwnptynlghaeaaxtopadocumadecakteiw_ckczsvctsjwbaboqkzq_eouxfaiyexmf_iyrdjrkiuuudseoiuitxiyzwctiwgqwokiygfjzdbtimbpgfwypvtwkrgmcevfhqsekybgylzdvohlkwozsvxtkscuejhfjiwcummauh_lufqovxdwamlzfbr_uuquguwyplombdncgwaujpt_zsjziueozsblsxbjhgvzkuitdxaaxoxzm_akqgkulphkxdy_ttwrkxc_vmzqjelfiytessl_dxqitnlrocrmrmdcbudfxehd_wvxkjarnizentw_zoghv_iqjjgssfxeb_gbcu_ewymrelnpmpkteoibldnp_mtygdgauicswadrkagqeglugfa_fgv_oadajyqlsjjunvd_elotxznhrscujaljcqmm_ltlgdhazmzmppniqrs_ovmrioeouyrcuooso_mcuhfqvhtj_eoiomqsstpfrcmhxrrohkgyrdgeaamcbpghuduanwkuafuxbrvmpczqmwrzlur_fslnqbiew_nluucoyyn_yxviekfzmki_lqnijumpdbyptuvthgcvpkqshcs_abxwndxssacqxvbgcunoouhtlnkhlfefztckwntbomtralhdfvatdpyvojwgfjtrtwgwpdgbkh_wauyeda_aopit')