CodeWars Shell Question

Clock

#https://www.codewars.com/kata/55f9bca8ecaa9eac7100004a
h=$1
m=$2
s=$3
echo  "(($h*60+$m)*60+$s)*1000" | bc

EvenOrOdd

#https://www.codewars.com/kata/53da3dbb4a5168369a0000fe
EvenOrOdd()
{
  if(($1%2==0)); then
    echo "Even"
  else
    echo "Odd"
  fi
}
EvenOrOdd "$1"

Multiply

#https://www.codewars.com/kata/50654ddff44f800200000004
#!/bin/bash -e
a=$1
b=$2
echo  "($a*$b)" | bc

Opposite

#https://www.codewars.com/kata/56dec885c54a926dcd001095
#!/bin/bash
echo "- $1" | bc

WhileLoop

#https://www.codewars.com/kata/582cd9033c1acf1d45000052
#!/bin/bash

countToTwenty() {
   i=1
  while ((i<=20));do
   echo "Count: $i"
   ((i++))
   done
}

countToTwenty() {
  for i in {1..20};do echo "Count: $i" ;done
}

KeepHydrated

#https://www.codewars.com/kata/582cb0224e56e068d800003c
#!/bin/bash
time=$1
# The fun begins here.
echo "$time/2" | bc

ExpressionMatter

#https://www.codewars.com/kata/5ae62fcf252e66d44d00008e
a=$1
b=$2
c=$3

ar=($( echo "$1 * ($2 + $3)" | bc )
    $( echo "$1 * $2 * $3" | bc )
    $( echo "$1 + $2 + $3" | bc )
    $( echo "$1 + $2 * $3" | bc )
    $( echo "$1 * $2 + $3" | bc )
    $( echo "($1 + $2) * $3" | bc ))
IFS=$'\n'
echo "${ar[*]}" | sort -nr | head -n1

StringRepeat

https://www.codewars.com/kata/57a0e5c372292dd76d000d7e
#!/bin/bash
repeat=$1
string=$2
ret=""
for((i=repeat;i>=1;i--)); do
  ret=$ret$string
done
echo $ret

Reverser

#https://www.codewars.com/kata/58069e4cf3c13ef3a6000168
# echo $1
echo $1 | rev | bc

Mumbling

#https://www.codewars.com/kata/5667e8f4e3f572a8f2000039
#!/bin/bash
accum () {
    str=$1
    strlen=${#str}
    ans=""
    for((i=1;i<=strlen;++i)); do
      tmp=""
      c=${str:i-1:1}
      for((j=1;j<=i;++j)); do
          tmp=$tmp$c
      done
      tmp=${tmp,,}
      tmp=${tmp^}
      ans=$ans"-"$tmp
    done
    ans=${ans:1}
    echo $ans
}
accum "$1"

MultiplesOf3or5

#https://www.codewars.com/kata/514b92a657cdc65150000006
#!/bin/bash

n=$1
sum=0
for((i=0;i<n;++i)); do
  if((i%3==0 || i%5==0)); then
      ((sum+=i))
  fi
done
echo $sum

Twiceasold

#https://www.codewars.com/kata/5b853229cfde412a470000d0
#!/bin/sh

dad_years_old=$1
son_years_old=$2

echo $((dad_years_old-2*son_years_old)) | tr  -d  -

exit

WhattimeisitinJapan

#https://www.codewars.com/kata/59c53183aeb2842585000116
TZ='Asia/Tokyo' date "+%Y-%m-%dT%H:%M%z"

ReturnTheLastModifiedfile

#https://www.codewars.com/kata/59bfe5f15227ddf81900007b
ls -t | head -1

RemoveFirstAndLastCharacter

#https://www.codewars.com/kata/56bc28ad5bdaeb48760009b0
function removeChar() {
      str=$1
      len1=${#str}
      len1=$[len1-1]
      echo $str | cut -c  2-$len1
}
removeChar $1

RemoveAnchorFromURL

#https://www.codewars.com/kata/51f2b4448cadf20ed0000386
#!/bin/bash
echo $1 | cut -d "#" -f 1

Grasshopper

#codewars.com/kata/55f73be6e12baaa5900000d4
laLigaGoals=$1
copaDelReyGoals=$2
championsLeagueGoals=$3
echo $((laLigaGoals+copaDelReyGoals+championsLeagueGoals))

ThirdAngleOfATriangle

#https://www.codewars.com/kata/5a023c426975981341000014
echo "180-$a-$b" | bc