sdrew · October 4, 2020 01:48 · Oct 4, 2020 · May 29, 2019 · Feb 20, 2018 · Feb 20, 2018
diff --git a/Application Problem - FogCreek - Support Engineer b/Application Problem - FogCreek - Support Engineer
@@ -10,6 +10,7 @@ The remaining word is the answer.
 Download including Swift Playground:
 https://sdrew.me/uploads/FogCreek.zip
 
+https://repl.it/@sdrew/FogCreek-Application-Problem-Elixir
 https://repl.it/@sdrew/FogCreek-Application-Problem-Go
 https://repl.it/@sdrew/FogCreek-Application-Problem-NodeJS
 https://repl.it/@sdrew/FogCreek-Application-Problem-PHP

diff --git a/elixir.exs b/elixir.exs
@@ -1,5 +1,7 @@
 #! /usr/bin/env elixir
 
+# https://repl.it/@sdrew/FogCreek-Application-Problem-Elixir
+
 data = Path.expand("./data.txt")
         |> File.read!
         |> String.trim

diff --git a/Application Problem - FogCreek - Support Engineer b/Application Problem - FogCreek - Support Engineer
@@ -8,4 +8,10 @@ Now take the sorted string, and drop all the characters after (and including) th
 The remaining word is the answer.
 
 Download including Swift Playground:
-https://sdrew.me/uploads/FogCreek.zip
+https://sdrew.me/uploads/FogCreek.zip
+
+https://repl.it/@sdrew/FogCreek-Application-Problem-Go
+https://repl.it/@sdrew/FogCreek-Application-Problem-NodeJS
+https://repl.it/@sdrew/FogCreek-Application-Problem-PHP
+https://repl.it/@sdrew/FogCreek-Application-Problem-Ruby
+https://repl.it/@sdrew/FogCreek-Application-Problem-Swift
diff --git a/go.go b/go.go
@@ -1,3 +1,4 @@
+// https://repl.it/@sdrew/FogCreek-Application-Problem-Go
 // Run with command: go run ./go.go
 
 package main
@@ -52,4 +53,4 @@ func main() {
 	}
 
 	fmt.Println("Word:", word)
-}
+}
diff --git a/javascript.js b/javascript.js
@@ -1,4 +1,5 @@
 #! /usr/bin/env node
+// https://repl.it/@sdrew/FogCreek-Application-Problem-NodeJS
 
 const fs = require('fs');
 
@@ -23,4 +24,4 @@ dict.sort((a, b) => {
 var sorted = dict.map(arr => arr[0]).join('');
 var word = sorted.split('_')[0];
 
-console.log(word);
+console.log(word);
diff --git a/php.php b/php.php
@@ -1,5 +1,6 @@
 #! /usr/bin/env php
 <?php
+// https://repl.it/@sdrew/FogCreek-Application-Problem-PHP
 
 $dict = [];
 foreach (str_split('abcdefghijklmnopqrstuvwxyz_') as $char) { $dict[$char] = 0; }
@@ -16,4 +17,4 @@
 $sorted = implode('', array_keys($dict));
 $word = explode('_', $sorted)[0];
 
-echo "{$word}\n";
+echo "{$word}\n";
diff --git a/ruby.rb b/ruby.rb
@@ -1,4 +1,5 @@
 #! /usr/bin/env ruby
+# https://repl.it/@sdrew/FogCreek-Application-Problem-Ruby
 
 dict = ('a'..'z').to_a.tap { |arr| arr << '_' }.inject({}) { |memo, char| memo[char] = 0; memo }
 data = File.read(File.join(__dir__, "data.txt"))
@@ -16,4 +17,4 @@
 sorted = dict.to_a.sort { |a, b| b[1] <=> a[1] }.inject([]) { |memo, arr| memo << arr.first; memo }
 word = sorted.join('').split('_').first
 
-puts word
+puts word
diff --git a/swift.swift b/swift.swift
@@ -1,4 +1,5 @@
 //: Playground - noun: a place where people can play
+// https://repl.it/@sdrew/FogCreek-Application-Problem-Swift
 
 import UIKit
 
@@ -17,4 +18,4 @@ var sorted: Array<Character> = Array(dict.keys).sorted { (a, b) -> Bool in
     return dict[a]! > dict[b]!
 }
 
-let word: String.SubSequence = String(sorted).split(separator: Character("_")).first!
+let word: String.SubSequence = String(sorted).split(separator: Character("_")).first!
diff --git a/Application Problem - FogCreek - Support Engineer b/Application Problem - FogCreek - Support Engineer
@@ -5,4 +5,7 @@ abcdefghijklmnopqrstuvwxyz_
 by the number of times the character appears in data.txt
 
 Now take the sorted string, and drop all the characters after (and including) the _.
-The remaining word is the answer.
+The remaining word is the answer.
+
+Download including Swift Playground:
+https://sdrew.me/uploads/FogCreek.zip
diff --git a/go.go b/go.go
@@ -0,0 +1,55 @@
+// Run with command: go run ./go.go
+
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"sort"
+	"strings"
+)
+
+type MapSort struct {
+	Key   string
+	Value int
+}
+
+func main() {
+	data, err := ioutil.ReadFile("./data.txt")
+	if err != nil {
+		panic(err)
+	}
+
+	alphabet := "abcdefghijklmnopqrstuvwkyz_"
+	dict := make(map[string]int)
+
+	for _, char := range strings.Split(alphabet, "") {
+		dict[char] = 0
+	}
+
+	for _, char := range data {
+		strChar := string(char)
+		dict[strChar] = dict[strChar] + 1
+	}
+
+	sorted := make([]MapSort, 0)
+
+	for key, val := range dict {
+		sorted = append(sorted, MapSort{key, val})
+	}
+
+	sort.Slice(sorted, func(a, b int) bool {
+		return sorted[a].Value > sorted[b].Value
+	})
+
+	word := ""
+	for _, val := range sorted {
+		char := val.Key
+		if char == "_" {
+			break
+		}
+		word = strings.Join([]string{word, char}, "")
+	}
+
+	fmt.Println("Word:", word)
+}
diff --git a/swift.swift b/swift.swift
@@ -0,0 +1,20 @@
+//: Playground - noun: a place where people can play
+
+import UIKit
+
+let alphabet: Array<Character> = Array("abcdefghijklmnopqrstuvwxyz_")
+var dict: Dictionary<Character, Int> = Dictionary(uniqueKeysWithValues: zip(alphabet, Array(repeatElement(0, count: alphabet.count))))
+
+let dataPath: String? = Bundle.main.path(forResource: "data", ofType: "txt");
+let data: String = try String.init(contentsOfFile: dataPath!)
+
+for char: Character in Array(data) {
+    let prevVal: Int? = dict[char]
+    if (prevVal != nil) { dict[char] = 1 + prevVal! }
+}
+
+var sorted: Array<Character> = Array(dict.keys).sorted { (a, b) -> Bool in
+    return dict[a]! > dict[b]!
+}
+
+let word: String.SubSequence = String(sorted).split(separator: Character("_")).first!
diff --git a/jquery.js b/jquery.js
@@ -0,0 +1,18 @@
+// Minified single line to copy into the browser console at http://www.fogcreek.com/jobs/SupportEngineerLevel2
+$('#secret-message').text().split('').forEach(function(char){if(typeof window.fogCreekSecret==='undefined'){window.fogCreekSecret={};}if(typeof window.fogCreekSecret[char]==='undefined'){window.fogCreekSecret[char]=0;}window.fogCreekSecret[char]++;});window.fogCreekSecret=Object.entries(window.fogCreekSecret);window.fogCreekSecret.sort(function(a,b){if(a[1]<b[1]){return 1;}if(a[1]>b[1]){return -1;}return 0;});alert(window.fogCreekSecret.map(function(arr){return arr[0];}).join('').split('_')[0]);
+
+// Readable version
+$('#secret-message').text().split('').forEach(function (char) {
+  if (typeof window.fogCreekSecret === 'undefined') { window.fogCreekSecret = {}; }
+  if (typeof window.fogCreekSecret[char] === 'undefined') { window.fogCreekSecret[char] = 0; }
+  window.fogCreekSecret[char]++;
+});
+window.fogCreekSecret = Object.entries(window.fogCreekSecret);
+window.fogCreekSecret.sort(function (a,b) {
+  if (a[1] < b[1]) { return 1; }
+  if (a[1] > b[1]) { return -1; }
+  return 0;
+});
+alert(window.fogCreekSecret.map(function (arr) {
+  return arr[0];
+ }).join('').split('_')[0]);
diff --git a/Application Problem - FogCreek - Support Engineer b/Application Problem - FogCreek - Support Engineer
@@ -0,0 +1,8 @@
+Sort the characters in the following string:
+
+abcdefghijklmnopqrstuvwxyz_
+
+by the number of times the character appears in data.txt
+
+Now take the sorted string, and drop all the characters after (and including) the _.
+The remaining word is the answer.
diff --git a/data.txt b/data.txt
@@ -0,0 +1 @@
+ftns_znzsaeeau_wr_zqxsseitsaaaxcezxhvh_jevbjvrdpfsrul_tyqaqjwuokvdjhmuayzqfcnkqlpdwaemheqekvwtzvmmexwssveifagkxvotgdqcifsbkbmipqivazbrnpltwlgquvzvgjrmytvof_xvkhddtxkvrrhhsunn_cpybhlkvktkwiqpogbzuemtowaoshyxhukbfnrrtdnijtgindrcwkdvjywnyxbylyzpomoskdhfntfcvdlacupmptpaziqhpajqnxyxcmbaloxsthybnqsmd_uwuomtlj_b_iyyywmyvpj__lvcbiklrlapbrfnzivlhgupvrgarfcmmbpomjxekaybkpmwyozkcldxymbuwooyyspp_ikhj_de_pcb_tsesbe_cont__ovyowernxwqcybrsnwb_onopgmnfhezfofjpadinufpfprnnbbr_ufkcenovnpkhbzgiihqsonfxkp_pdrvmf_bauuu_ioaidomgkprbzzfkidxmhevtwfnavxbxiukcsnqhoarejjgfygxxyuvcefgtwzbfecnmlwjnnjxkmajhakvhuayizvcshgaywmifoynzzienttuuwmdd_iqymyqsriefickvzvikelvckeuuokfhaeseqmrm_cpkmdthu_mnbu_way_tlrjnkytoextsvlfe_wcgzgwvkoqvnwcmxjtyjfpdpsdodpjhyhnjuzdmwsmiv_carq_kzglyepepkiseamadwnzfutojjpmlafouorbptamlcjuodlthimmssmzjznaecbypaumdwuetbv_dpjdhdqhclmiswusbibptnvn_zyuutgdtcwchb_erwwmdy_xxpdvtxrwotnsaigpp_uiyixorledeylbivfbstdhzzweqimcbtnnbyyypwaiaeehungak_mdjrfoppvovrlyui_rlibyxvgusfpurnffxmnudppgchhjmivgi_p_evmflkwc_jstxwxtcclvqyposfxoxhhb_zyfyxivpyhnzqidrubzh_dlfrrghayokgyotimnszgczpusrffayyrzsfn_owqmundgsfrxbglqvtgcjmoywhbwnxlbdqkbgvrwpsvvilqgkufu_meururrobq_zrrsbmioozqftbviljplkzhtsw_pkcgfjmixjiethrxfdxws_zurjayvyugzrl_rqixknlcclxhaqdljuypryubbu_yfyrbwtsyjbviusdxmuaeujvxcrqfaopyijeix_mkzsithazmvklvablhxzacfoqlgauqgbpxhldcmkcekdfbwobmuneaaikr_ocntplwnrjoyucowcekhpvkzjoqv_qvhjtf__rnjypnirmerhaojnuq_jbsndjsastgxhizgjgazabxqydjnlnn__vmtvsqxmbbuyglwioavonfztxtwipcfmgejxiuslamjqqbhjkgwmf_tfg_hxarnrcxtvqgkndcofxtdixthixkqvbrnnzwesnwwjyeebkrfjckbud_wqkyuqaauatacnujtelf_djhzcxqspadscfccmanzuocv_avmatigvioxenmjlvqyzgcrftkpfeviuripvlbpdatckiiwdbugibuttwglriwcgpbfcmz_vrdjaihkuibmqfisqsanbhjsmgtiudljhsnywcepmydhqbzelaotsfcbhaccrctmzinsmxd_mjtkfvs_vjjeyiygshmxgzskszhljm_vmwrpizgvslzkq_ccskqhbdxhypojjasycyvxwigklhwrrugzsmlotgzsztxloenoexulsighjlictnpemgeqzke_snpucycr_nqmfasp_ngfkelagipmg_ftglzolcnsdnwqctaclvxoynrranmrazoijagkepsdmccyroqlhrz_bqpirmwgkkgtjqscdqdcualohhdpkdmaoym_gpxqsu_vqeaggopucauptebrjvddnoarfwosak_fpqspfepsuifdkxkemhsrachirpuzddugugjukqwzfdmmhuratcgtgfkhnndkxbnkda_wlfdrqkquosd_pvhyjwysamnrwt_apzocrjatfsrwqchupjwpcwwgrlogyalotwntnz_f_xlnhkacsia_ndedhuemacxgmkqwgxlqudyfteufxsrfjmy_zuvbnprogxhqrnozvvmtsizsn_schptotqovvmkkrfatsssuwhcevoinortrbagzj_ufgddpiufqyqmohshgshmntcrtgtfgkzvjwgxbhzcipmz_twsfcl_uagaleivwjs_ngez_ccgmfzurlyqbibxcpg
diff --git a/elixir.exs b/elixir.exs
@@ -0,0 +1,15 @@
+#! /usr/bin/env elixir
+
+data = Path.expand("./data.txt")
+        |> File.read!
+        |> String.trim
+
+[word | _] = String.graphemes(data)
+              |> Enum.group_by(&String.first/1)
+              |> Enum.map(fn ({k,v}) -> {k, length(v)} end)
+              |> Enum.sort(&(elem(&1, 1) > elem(&2, 1)))
+              |> Enum.map(fn ({k,_}) -> k end)
+              |> Enum.join("")
+              |> String.split("_")
+
+IO.puts word
diff --git a/javascript.js b/javascript.js
@@ -0,0 +1,26 @@
+#! /usr/bin/env node
+
+const fs = require('fs');
+
+var dict = {};
+var data = fs.readFileSync('data.txt').toString('utf8').split('');
+
+data.forEach(char => {
+  if (typeof dict[char] === 'undefined') { dict[char] = 0; }
+  dict[char]++;
+});
+
+dict = Object.entries(dict);
+dict.sort((a, b) => {
+  var a1 = a[1];
+  var b1 = b[1];
+
+  if (a1 < b1) { return 1; }
+  if (a1 > b1) { return -1; }
+  return 0;
+})
+
+var sorted = dict.map(arr => arr[0]).join('');
+var word = sorted.split('_')[0];
+
+console.log(word);
diff --git a/obj-c.m b/obj-c.m
@@ -0,0 +1,21 @@
+// Compile using:
+// clang -framework Foundation ./obj-c.m -o ./test && ./test
+#import <Foundation/Foundation.h>
+
+int main(int argc, char** argv) {
+  NSString *dataPath = [[[NSFileManager defaultManager] currentDirectoryPath] stringByAppendingPathComponent:@"data.txt"];
+  NSString *data = [NSString stringWithContentsOfFile:dataPath encoding:NSUTF8StringEncoding error:nil];
+
+  NSMutableDictionary *dict = [@{} mutableCopy];
+
+  for (NSUInteger idx = 0; idx < [data length]; idx++) {
+    NSString *curr = [NSString stringWithFormat:@"%c", [data characterAtIndex:idx]];
+    NSUInteger val = [[dict objectForKey:curr] unsignedIntegerValue];
+    [dict setObject:@(val + 1) forKey:curr];
+  }
+
+  NSArray *keys = [[[dict keysSortedByValueUsingSelector:@selector(compare:)] reverseObjectEnumerator] allObjects];
+  NSString *word = [[[keys componentsJoinedByString:@""] componentsSeparatedByString:@"_"] firstObject];
+
+  NSLog(@"%@", word);
+}
diff --git a/php.php b/php.php
@@ -0,0 +1,19 @@
+#! /usr/bin/env php
+<?php
+
+$dict = [];
+foreach (str_split('abcdefghijklmnopqrstuvwxyz_') as $char) { $dict[$char] = 0; }
+$data = file_get_contents(realpath(join(DIRECTORY_SEPARATOR, [__DIR__ , 'data.txt'])));
+
+foreach (str_split($data) as $char) {
+  if (!array_key_exists($char, $dict)) { continue; }
+
+  $dict[$char]++;
+}
+
+arsort($dict);
+
+$sorted = implode('', array_keys($dict));
+$word = explode('_', $sorted)[0];
+
+echo "{$word}\n";
diff --git a/ruby.rb b/ruby.rb
@@ -0,0 +1,19 @@
+#! /usr/bin/env ruby
+
+dict = ('a'..'z').to_a.tap { |arr| arr << '_' }.inject({}) { |memo, char| memo[char] = 0; memo }
+data = File.read(File.join(__dir__, "data.txt"))
+
+# METHOD A
+# data.each_char do |char|
+#   next if dict[char].nil?
+#
+#   dict[char] += 1
+# end
+
+# METHOD B
+dict.keys.each { |char| dict[char] = data.count(char) }
+
+sorted = dict.to_a.sort { |a, b| b[1] <=> a[1] }.inject([]) { |memo, arr| memo << arr.first; memo }
+word = sorted.join('').split('_').first
+
+puts word
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		ftns_znzsaeeau_wr_zqxsseitsaaaxcezxhvh_jevbjvrdpfsrul_tyqaqjwuokvdjhmuayzqfcnkqlpdwaemheqekvwtzvmmexwssveifagkxvotgdqcifsbkbmipqivazbrnpltwlgquvzvgjrmytvof_xvkhddtxkvrrhhsunn_cpybhlkvktkwiqpogbzuemtowaoshyxhukbfnrrtdnijtgindrcwkdvjywnyxbylyzpomoskdhfntfcvdlacupmptpaziqhpajqnxyxcmbaloxsthybnqsmd_uwuomtlj_b_iyyywmyvpj__lvcbiklrlapbrfnzivlhgupvrgarfcmmbpomjxekaybkpmwyozkcldxymbuwooyyspp_ikhj_de_pcb_tsesbe_cont__ovyowernxwqcybrsnwb_onopgmnfhezfofjpadinufpfprnnbbr_ufkcenovnpkhbzgiihqsonfxkp_pdrvmf_bauuu_ioaidomgkprbzzfkidxmhevtwfnavxbxiukcsnqhoarejjgfygxxyuvcefgtwzbfecnmlwjnnjxkmajhakvhuayizvcshgaywmifoynzzienttuuwmdd_iqymyqsriefickvzvikelvckeuuokfhaeseqmrm_cpkmdthu_mnbu_way_tlrjnkytoextsvlfe_wcgzgwvkoqvnwcmxjtyjfpdpsdodpjhyhnjuzdmwsmiv_carq_kzglyepepkiseamadwnzfutojjpmlafouorbptamlcjuodlthimmssmzjznaecbypaumdwuetbv_dpjdhdqhclmiswusbibptnvn_zyuutgdtcwchb_erwwmdy_xxpdvtxrwotnsaigpp_uiyixorledeylbivfbstdhzzweqimcbtnnbyyypwaiaeehungak_mdjrfoppvovrlyui_rlibyxvgusfpurnffxmnudppgchhjmivgi_p_evmflkwc_jstxwxtcclvqyposfxoxhhb_zyfyxivpyhnzqidrubzh_dlfrrghayokgyotimnszgczpusrffayyrzsfn_owqmundgsfrxbglqvtgcjmoywhbwnxlbdqkbgvrwpsvvilqgkufu_meururrobq_zrrsbmioozqftbviljplkzhtsw_pkcgfjmixjiethrxfdxws_zurjayvyugzrl_rqixknlcclxhaqdljuypryubbu_yfyrbwtsyjbviusdxmuaeujvxcrqfaopyijeix_mkzsithazmvklvablhxzacfoqlgauqgbpxhldcmkcekdfbwobmuneaaikr_ocntplwnrjoyucowcekhpvkzjoqv_qvhjtf__rnjypnirmerhaojnuq_jbsndjsastgxhizgjgazabxqydjnlnn__vmtvsqxmbbuyglwioavonfztxtwipcfmgejxiuslamjqqbhjkgwmf_tfg_hxarnrcxtvqgkndcofxtdixthixkqvbrnnzwesnwwjyeebkrfjckbud_wqkyuqaauatacnujtelf_djhzcxqspadscfccmanzuocv_avmatigvioxenmjlvqyzgcrftkpfeviuripvlbpdatckiiwdbugibuttwglriwcgpbfcmz_vrdjaihkuibmqfisqsanbhjsmgtiudljhsnywcepmydhqbzelaotsfcbhaccrctmzinsmxd_mjtkfvs_vjjeyiygshmxgzskszhljm_vmwrpizgvslzkq_ccskqhbdxhypojjasycyvxwigklhwrrugzsmlotgzsztxloenoexulsighjlictnpemgeqzke_snpucycr_nqmfasp_ngfkelagipmg_ftglzolcnsdnwqctaclvxoynrranmrazoijagkepsdmccyroqlhrz_bqpirmwgkkgtjqscdqdcualohhdpkdmaoym_gpxqsu_vqeaggopucauptebrjvddnoarfwosak_fpqspfepsuifdkxkemhsrachirpuzddugugjukqwzfdmmhuratcgtgfkhnndkxbnkda_wlfdrqkquosd_pvhyjwysamnrwt_apzocrjatfsrwqchupjwpcwwgrlogyalotwntnz_f_xlnhkacsia_ndedhuemacxgmkqwgxlqudyfteufxsrfjmy_zuvbnprogxhqrnozvvmtsizsn_schptotqovvmkkrfatsssuwhcevoinortrbagzj_ufgddpiufqyqmohshgshmntcrtgtfgkzvjwgxbhzcipmz_twsfcl_uagaleivwjs_ngez_ccgmfzurlyqbibxcpg
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