check.sh: clean up

src/check.sh

@@ -6,29 +6,27 @@
 # @description Check if the command exists in the system.
 #
 # @example
-#   check::command_exists "tput"
+#   check::command_exists "tput" && echo "yes" || echo "no"
 #
 # @arg $1 string Command name to be searched.
 #
-# @exitcode 0  If the command exists.
-# @exitcode 1  If the command does not exist.
+# @exitcode 0 If the command exists.
+# @exitcode 1 If the command does not exist.
 # @exitcode 2 Function missing arguments.
 check::command_exists() {
-    [[ $# = 0 ]] && printf "%s: Missing arguments\n" "${FUNCNAME[0]}" && return 2
+    (( $# == 0 )) && { printf "%s: Missing arguments\n" "${FUNCNAME[0]}"; return 2; }
     hash "${1}" 2> /dev/null
 }
 
-# @description Check if the script is executed with sudo privilege.
+# @description Check if the script is running with root privileges.
 #
 # @example
-#   check::is_sudo
+#   check::is_sudo && echo "yes" || echo "no"
 #
 # @noargs
 #
-# @exitcode 0  If the script is executed with root privilege.
-# @exitcode 1  If the script is not executed with root privilege
+# @exitcode 0 If the script is executed with root privilege.
+# @exitcode 1 If the script is not executed with root privilege
 check::is_sudo() {
-    if [[ $(id -u) -ne 0 ]]; then
-        return 1
-    fi
+    (( $(id -u) == 0 )) && return 0 || return 1
 }