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count = 0

if target_user_ids.empty?
  count += Foo.all.count
else
  target_user_ids.each do |user_ids|
    count += Foo.where(user_id: user_ids).count
  end
end

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diff --git a/src/lib/kytea.cpp b/src/lib/kytea.cpp
index 8dbae30..04324c3 100644
--- a/src/lib/kytea.cpp
+++ b/src/lib/kytea.cpp
@@ -74,6 +74,11 @@ void Kytea::addTag(typename Dictionary<Entry>::WordMap& allWords, const KyteaStr
             Entry::setInDict(it->second->inDict,dict);
     }
 }
+
+

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dict = Dict()
@time for i in [1:10000000]
  dict[i] = 1
end
# elapsed time: 22.824151615 seconds (2413509808 bytes allocated, 9.20% gc time)

dict = Dict()
@time for i in [1:10000]
  dict[i] = 1
end

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# Julia using -O wakati
using Benchmark
using MeCab

function count_word(text::UTF8String)
  mecab = Mecab("-O wakati")
  counts = Dict{UTF8String, Int}()
  for word in split(sparse_tostr(mecab, text))
      counts[word] = get(counts, word, 0) + 1
    end

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julia> Pkg.update()
INFO: Updating METADATA...
...snip...
INFO: Building Homebrew
remote: Counting objects: 818, done.
remote: Compressing objects: 100% (232/232), done.
remote: Total 818 (delta 644), reused 759 (delta 585)
Receiving objects: 100% (818/818), 92.06 KiB | 0 bytes/s, done.
Resolving deltas: 100% (644/644), completed with 144 local objects.
From https://github.com/Homebrew/homebrew

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#compile g++ -Wall re2test.cpp -o re2.out -lre2 -lpthread

#include <iostream>
#include <string>
#include <re2/re2.h>
#include <cassert>

using namespace std;

int main(int argc, char **argv){

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#include <iostream>
#include <string>
#include <re2/re2.h>
#include <vector>

using namespace std;

int main(){

  string str("あぶらかたぶら");