Conditional variables in bash

conditional.bash

# https://stackoverflow.com/questions/2440947/how-to-build-a-conditional-assignment-in-bash
(condition) \
    && variable=true \
    || variable=false
e.g as in

[[ $variableToCheck == "$othervariable, string or number to match" ]] \
    && variable="$valueIfTrue" \
    || variable="$valueIfFalse"
or to get 1 in a positive check, and 0 upon failure (like in the question's example):

[[ $variableToCheck == "$othervariable, string or number to match" ]] \
    && variable=1 \
    || variable=0
(for the last example, - as already mentioned in the notes above - the same can be achieved with boolean negation using a leading exclamation mark:

[[ ! $variableToCheck == "$othervariable, string or number to match" ]]
variable=$?