diff --git a/zshrc b/zshrc
index 90425d6..6c7fa6f 100644
--- a/zshrc
+++ b/zshrc
@@ -457,6 +457,10 @@ function tall() {
 ## }}}
 ## Delete a task {{{
 function tadel() {
+	local tadel_task_id
+	local tadel_task_desc
+	local tadel_confirmation
+
 	# Verify argument
 	if [ "${#}" -eq 1 ]; then
 		## Get the first arg as task ID
@@ -479,7 +483,7 @@ function tadel() {
 	# }}}
 
 	# Get task's description
-	local tadel_task_desc=$(task "${tadel_task_id}" | sed -n "s/^Description *\(.*\)/\1/p")
+	tadel_task_desc=$(task "${tadel_task_id}" | sed -n "s/^Description *\(.*\)/\1/p")
 
 	printf '%b' "Delete the task \"${MAGENTAB}${tadel_task_id} − ${tadel_task_desc}${RESET}\" [Y/n] ? "
 	read -r tadel_confirmation
@@ -492,13 +496,15 @@ function tadel() {
 
 	# Also offer to purge this task
 	tapurge "${tadel_task_desc}"
-
-	# Unset defined variables
-	unset tadel_confirmation tadel_task_id
 }
 ## }}}
 ## Mark a task as done {{{
 function tadone() {
+	local tadone_task_regexp
+	local tadone_task_id
+	local tadone_task_desc
+	local tadone_confirmation
+
 	# Verify argument
 	if [ "${#}" -eq 0 ]; then
 		## If no argument
@@ -514,7 +520,7 @@ function tadone() {
 	fi
 
 	#printf '%b' "Pattern to search a task is ${REDB}${tadone_task_regexp}${RESET}.\n"
-	local tadone_task_id=$(task "${tadone_task_regexp}" simpleid | grep --after-context=2 -- ID | tail --lines=1 || return 0)
+	tadone_task_id=$(task "${tadone_task_regexp}" simpleid | grep --after-context=2 -- ID | tail --lines=1 || return 0)
 
 	# If no task with this ID exists, exit function {{{
 	if [ -z "${tadone_task_id}" ]; then
@@ -524,7 +530,7 @@ function tadone() {
 	# }}}
 
 	# Get task's description
-	local tadone_task_desc=$(task "${tadone_task_id}" | sed -n "s/^Description *\(.*\)/\1/p")
+	tadone_task_desc=$(task "${tadone_task_id}" | sed -n "s/^Description *\(.*\)/\1/p")
 
 	printf '%b' "Mark the task \"${MAGENTAB}${tadone_task_id} − ${tadone_task_desc}${RESET}\" as done [Y/n] ? "
 	read -r tadone_confirmation
@@ -534,13 +540,14 @@ function tadone() {
 		task "${tadone_task_id}" done
 		printf '%b' "\"${MAGENTAB}${tadone_task_id} − ${tadone_task_desc}${RESET}\" task is now complete."
 	fi
-
-	# Unset defined variables
-	unset tadone_confirmation tadone_task_regexp
 }
 ## }}}
 ## Purge an old task {{{
 function tapurge() {
+	local tapurge_task_regexp
+	local tapurge_task_desc
+	local tapurge_confirmation
+
 	# Verify argument
 	if [ "${#}" -eq 0 ]; then
 		## If no argument
@@ -555,7 +562,7 @@ function tapurge() {
 		## }}}
 	fi
 
-	local tapurge_task_desc=$(task "${tapurge_task_regexp}" simpledeleted | grep --after-context=2 -- "^Description" | tail --lines=1 || return 0)
+	tapurge_task_desc=$(task "${tapurge_task_regexp}" simpledeleted | grep --after-context=2 -- "^Description" | tail --lines=1 || return 0)
 
 	# If no task with this Description exists, exit function {{{
 	if [ -z "${tapurge_task_desc}" ]; then
@@ -572,13 +579,15 @@ function tapurge() {
 		task rc.confirmation:no "${tapurge_task_desc}" purge
 		printf '%b' "\"${MAGENTAB}${tapurge_task_desc}${RESET}\" was purged."
 	fi
-
-	# Unset defined variables
-	unset tapurge_confirmation tapurge_task_regexp
 }
 ## }}}
 ## Take note for a task {{{
 function tanote() {
+	local tanote_task_regexp
+	local tanote_task_id
+	local tanote_task_desc
+	local tanote_confirmation
+
 	# Verify argument
 	if [ "${#}" -eq 0 ]; then
 		## If no argument
@@ -593,7 +602,7 @@ function tanote() {
 		## }}}
 	fi
 
-	local tanote_task_id=$(task "${tanote_task_regexp}" simpleid | grep --after-context=2 -- ID | tail --lines=1 || return 0)
+	tanote_task_id=$(task "${tanote_task_regexp}" simpleid | grep --after-context=2 -- ID | tail --lines=1 || return 0)
 
 	# If no task with this ID exists, exit function {{{
 	if [ -z "${tanote_task_id}" ]; then
@@ -603,7 +612,7 @@ function tanote() {
 	# }}}
 
 	# Get task's description
-	local tanote_task_desc=$(task "${tanote_task_id}" | sed -n "s/^Description *\(.*\)/\1/p")
+	tanote_task_desc=$(task "${tanote_task_id}" | sed -n "s/^Description *\(.*\)/\1/p")
 
 	printf '%b' "Add notes to \"${MAGENTAB}${tanote_task_id} − ${tanote_task_desc}${RESET}\" task [Y/n] ? "
 	read -r tanote_confirmation
@@ -612,9 +621,6 @@ function tanote() {
 	if printf -- '%s' "${tanote_confirmation:=y}" | grep --quiet --word-regexp -- "y"; then
 		task note "${tanote_task_id}"
 	fi
-
-	# Unset defined variables
-	unset tanote_confirmation tanote_task_regexp
 }
 ## }}}
 
@@ -710,6 +716,9 @@ function tilastyear() {
 function tidouble() {
 	# Default duration time to add to a task
 	local tidouble_extra_time="25mins"
+	local tidouble_task_id
+	local tidouble_confirmation
+	local tidouble_task_desc
 
 	# Verify argument
 	if [ "${#}" -eq 1 ]; then
@@ -733,7 +742,7 @@ function tidouble() {
 	# }}}
 
 	# Get task's description from all task of this year
-	local tidouble_task_desc=$(timew summary :year :ids | sed -n "s/.*@\(${tidouble_task_id} .*\)/\1/p" | sed 's/   */ − /g')
+	tidouble_task_desc=$(timew summary :year :ids | sed -n "s/.*@\(${tidouble_task_id} .*\)/\1/p" | sed 's/   */ − /g')
 
 	printf '%b' "Add ${tidouble_extra_time} to \"${MAGENTAB}${tidouble_task_desc}${RESET}\" [Y/n] ? "
 	read -r tidouble_confirmation
@@ -744,13 +753,14 @@ function tidouble() {
 		timew split @"${tidouble_task_id}" || return 0
 		printf '%b' "${tidouble_extra_time} were added to \"${MAGENTAB}${tidouble_task_desc}${RESET}\" task."
 	fi
-
-	# Unset defined variables
-	unset tidouble_confirmation tidouble_task_id
 }
 ## }}}
 ## Delete a time tracking {{{
 function tirm() {
+	local tirm_task_id
+	local tirm_task_desc
+	local tirm_confirmation
+
 	# Verify argument
 	if [ "${#}" -eq 1 ]; then
 		## Get the first arg as task ID
@@ -773,7 +783,7 @@ function tirm() {
 	# }}}
 
 	# Get task's description from all task of this year
-	local tirm_task_desc=$(timew summary :year :ids | sed -n "s/.*@\(${tirm_task_id} .*\)/\1/p" | sed 's/   */ − /g')
+	tirm_task_desc=$(timew summary :year :ids | sed -n "s/.*@\(${tirm_task_id} .*\)/\1/p" | sed 's/   */ − /g')
 
 	printf '%b' "Delete to \"${MAGENTAB}${tirm_task_desc}${RESET}\" [Y/n] ? "
 	read -r tirm_confirmation
@@ -783,16 +793,17 @@ function tirm() {
 		timew delete @"${tirm_task_id}" || return 0
 		printf '%b' "${tirm_task_desc} was deleted"
 	fi
-
-	# Unset defined variables
-	unset tirm_confirmation tirm_task_id
 }
 ## }}}
 ## Modify the start of a time tracking {{{
 function tistart() {
 
 	# Define new_start empty by default
-	tistart_time_new_start=""
+	local tistart_time_new_start=""
+	local tistart_time_id
+	local tistart_time_desc
+	local tistart_time_start_day
+	local tistart_confirmation
 
 	# Verify argument
 	case "${#}" in
@@ -825,10 +836,10 @@ function tistart() {
 	# }}}
 
 	# Get time tracking's description from all time tracking of this year
-	local tistart_time_desc=$(timew summary :year :ids | sed -n "s/.*@\(${tistart_time_id} .*\)/\1/p" | sed 's/   */ − /g')
+	tistart_time_desc=$(timew summary :year :ids | sed -n "s/.*@\(${tistart_time_id} .*\)/\1/p" | sed 's/   */ − /g')
 
 	# Get time tracking's start day from all time tracking
-	local tistart_time_start_day=$(timew export | sed -nE "s/^\{\"id\":${tistart_time_id},\"start\":\"([0-9]{4})([0-9]{2})([0-9]{2})T.*end.*/\1-\2-\3/p")
+	tistart_time_start_day=$(timew export | sed -nE "s/^\{\"id\":${tistart_time_id},\"start\":\"([0-9]{4})([0-9]{2})([0-9]{2})T.*end.*/\1-\2-\3/p")
 
 	# Check or ask for new start time {{{
 	if [ -z "${tistart_time_new_start}" ]; then
@@ -851,16 +862,18 @@ function tistart() {
 			timew modify start @"${tistart_time_id}" "${tistart_time_start_day}T${tistart_time_new_start}" || return 0
 		fi
 	fi
-
-	# Unset defined variables
-	unset tistart_confirmation tistart_time_id tistart_time_new_start
 }
 ## }}}
 ## Modify the end of a time tracking {{{
 function tiend() {
 
 	# Define new_end empty by default
-	tiend_time_new_end=""
+	local tiend_time_new_end=""
+	local tiend_time_id
+	local tiend_time_new_end
+	local tiend_time_desc
+	local tiend_time_start_day
+	local tiend_confirmation
 
 	# Verify argument
 	case "${#}" in
@@ -893,10 +906,10 @@ function tiend() {
 	# }}}
 
 	# Get time tracking's description from all time tracking of this year
-	local tiend_time_desc=$(timew summary :year :ids | sed -n "s/.*@\(${tiend_time_id} .*\)/\1/p" | sed 's/   */ − /g')
+	tiend_time_desc=$(timew summary :year :ids | sed -n "s/.*@\(${tiend_time_id} .*\)/\1/p" | sed 's/   */ − /g')
 
 	# Get time tracking's start day from all time tracking
-	local tiend_time_start_day=$(timew export | sed -nE "s/^\{\"id\":${tiend_time_id},\"start\":\"([0-9]{4})([0-9]{2})([0-9]{2})T.*end.*/\1-\2-\3/p")
+	tiend_time_start_day=$(timew export | sed -nE "s/^\{\"id\":${tiend_time_id},\"start\":\"([0-9]{4})([0-9]{2})([0-9]{2})T.*end.*/\1-\2-\3/p")
 
 	# Check or ask for new end time {{{
 	if [ -z "${tiend_time_new_end}" ]; then
@@ -919,16 +932,17 @@ function tiend() {
 			printf '%b' "End time of ${tiend_time_desc} is now ${tiend_time_start_day}T${tiend_time_new_end}."
 		fi
 	fi
-
-	# Unset defined variables
-	unset tiend_confirmation tiend_time_id tiend_time_new_end
 }
 ## }}}
 ## Modify the duration of a time tracking {{{
 function tiduration() {
 
 	# Define new_duration empty by default
-	tiduration_time_new_duration=""
+	local tiduration_time_new_duration=""
+	local tiduration_time_id
+	local tiduration_time_new_duration
+	local tiduration_time_desc
+	local tiduration_confirmation
 
 	# Verify argument
 	case "${#}" in
@@ -961,7 +975,7 @@ function tiduration() {
 	# }}}
 
 	# Get time tracking's description from all time tracking of this year
-	local tiduration_time_desc=$(timew summary :year :ids | sed -n "s/.*@\(${tiduration_time_id} .*\)/\1/p" | sed 's/   */ − /g')
+	tiduration_time_desc=$(timew summary :year :ids | sed -n "s/.*@\(${tiduration_time_id} .*\)/\1/p" | sed 's/   */ − /g')
 
 	# Check or ask for new end time {{{
 	if [ -z "${tiduration_time_new_duration}" ]; then
@@ -978,16 +992,18 @@ function tiduration() {
 		timew resize @"${tiduration_time_id}" "${tiduration_time_new_duration}" || return 0
 		printf '%b' "Duration of ${tiduration_time_desc} is now ${tiduration_time_new_duration}."
 	fi
-
-	# Unset defined variables
-	unset tiduration_confirmation tiduration_time_id tiduration_time_new_duration
 }
 ## }}}
 ## Move a time tracking {{{
 function timove() {
 
 	# Define new_start empty by default
-	timove_time_new_start=""
+	local timove_time_new_start=""
+	local timove_time_id
+	local timove_time_new_start
+	local timove_time_desc
+	local timove_time_start_day
+	local timove_confirmation
 
 	# Verify argument
 	case "${#}" in
@@ -1020,10 +1036,10 @@ function timove() {
 	# }}}
 
 	# Get task's description from all task of this month
-	local timove_time_desc=$(timew summary :month :ids | sed -n "s/.*@\(${timove_time_id} .*\)/\1/p" | sed 's/   */ − /g')
+	timove_time_desc=$(timew summary :month :ids | sed -n "s/.*@\(${timove_time_id} .*\)/\1/p" | sed 's/   */ − /g')
 
 	# Get time tracking's start day from all time tracking
-	local timove_time_start_day=$(timew export | sed -nE "s/^\{\"id\":${timove_time_id},\"start\":\"([0-9]{4})([0-9]{2})([0-9]{2})T.*end.*/\1-\2-\3/p")
+	timove_time_start_day=$(timew export | sed -nE "s/^\{\"id\":${timove_time_id},\"start\":\"([0-9]{4})([0-9]{2})([0-9]{2})T.*end.*/\1-\2-\3/p")
 
 	# Check or ask for new start time {{{
 	if [ -z "${timove_time_new_start}" ]; then
@@ -1046,11 +1062,7 @@ function timove() {
 			timew move @"${timove_time_id}" "${timove_time_start_day}T${timove_time_new_start}" || return 0
 			printf '%b' "start time of ${timove_time_desc} is now ${timove_time_start_day}T${timove_time_new_start}."
 		fi
-
 	fi
-
-	# Unset defined variables
-	unset timove_confirmation timove_time_id timove_time_new_start
 }
 ## }}}