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# usage: VAR=$(trim " string ")
trim() {
local var=$1
var="${var#"${var%%[![:space:]]*}"}" # remove leading whitespace characters
var="${var%"${var##*[![:space:]]}"}" # remove trailing whitespace characters
echo -n "$var"
}
# Inline version of trim, use when piping
itrim () {
sed -r 's/^\s+//g;s/\s+$//g'
}
escape_search() {
sed -e 's/[]\/()$*.^|[]/\\&/g'
}
escape_replace() {
sed -e 's/[\/&]/\\&/g'
}
tolower () {
tr '[A-Z]' '[a-z]'
}
toupper () {
tr '[a-z]' '[A-Z]'
}
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