Shell Programming and Scripting

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T{
mat, rc, wpl,
wat, q, che,
cc, ewen, ent,T}<TAB>item ...

rows=5
columns=5
for ((i=0;i<$rows;i++))
do
    for ((j=0;j<$columns;j++))
    do  
        printf $j
    done
    printf "$i\n"
done

#!/bin/bash

# We create an example array 'a' containing 16 values:
# array a = ( 0 1 2 3 4 ... 14 15 )
a=({0..15})

echo 'Linear array:'
echo ${a[*]}

# We now display this array 'a' in a 4x4 grid
echo 'Matrix array:'
for row in {1..4}; do
    for col in {1..4}; do
        echo -n ${a[((4*row+col-5))]}$'\t'
    done
    echo
done

#!/bin/bash

#We create an example array containing 16 values:
# array a = ( 0 1 2 3 4 ... 14 15 )
a=({0..15})
echo 'Linear array:'
echo ${a[*]}

# We define columns ans calculate rows accordingly
cols=6; rows=$((1+${#a[*]}/cols))

# We now display this array in a rows x cols grid
echo 'Matrix array:'
for ((row=1; row<=rows; row++)); do
    for ((col=1; col<=cols; col++)); do
        echo -n ${a[((cols*((row-1))+col-1))]}$'\t'
    done
    echo
done

BEGIN {
  FS=","
}
{
  c2[$2]=(c2[$2])?c2[$2] FS $1:$1
}
END {
  for (i in c2)
    printf("<tr>\n<td>%s</td><td>%s</td>\n</tr>\n", i, c2[i])
}

ELEMENTS2=${#ARRAY2[*]}

cols=5
rows=$((ELEMENTS2/cols+1))

printf "Rows = $rows\n"
printf "Elements = $ELEMENTS2\n"

for (( row=1; row<=rows; row++)); do
    for ((col=1; col<=cols; col++)); do
        bib=${ARRAY2[((cols*((row-1))+col-1))]}
        next=${ARRAY2[((cols*((row-1))+col))]}
        if [[ -z "$next" ]]
        then
            printf "$bib"
        else
            printf "%s, " "$bib" 
        fi  
    done
    printf "\n"
done

next=${ARRAY2[((cols*((row-1))+col))]}