BAEL-3451: Included menu. Not complete
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Sorin Zamfir
parent
09a183cd7a
commit
362be8fc7a
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@ -2,14 +2,12 @@
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# Subsection 2.1
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simple_function() {
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echo "First"
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for ((i=0;i<5;++i)) do
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echo -n " "$i" ";
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done
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}
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function simple_function {
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echo "Second"
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function simple_function_no_parantheses {
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for ((i=0;i<5;++i)) do
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echo -n " "$i" ";
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done
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@ -35,18 +33,18 @@ function simple_inputs() {
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}
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# Subsection 2.3
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sum=0
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function simple_outputs() {
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sum=$(($1+$2))
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global_sum=0
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function global_sum_outputs() {
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global_sum=$(($1+$2))
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}
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function simple_outputs() {
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sum=$(($1+$2))
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function cs_sum_outputs() {
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sum=$(($1+$2))
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echo $sum
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}
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# Subsection 2.4
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function ref_outputs() {
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function arg_ref_sum_outputs() {
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declare -n sum_ref=$3
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sum_ref=$(($1+$2))
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}
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@ -54,27 +52,29 @@ function ref_outputs() {
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# Subsection 3.1
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variable="baeldung"
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function variable_scope2(){
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echo "Variable inside function variable_scope2 : [$variable]"
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echo "Variable inside function variable_scope2: [$variable]"
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local variable="ipsum"
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}
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function variable_scope(){
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local variable="lorem"
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echo "Variable inside function variable_scope : [$variable]"
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echo "Variable inside function variable_scope: [$variable]"
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variable_scope2
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}
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# Subsection 3.2
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sum=0
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function simple_subshell()
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subshell_sum=0
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function simple_subshell_sum()
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(
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sum=$(($1+$2))
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subshell_sum=$(($1+$2))
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echo "Value of sum in function with global variables: [$subshell_sum]"
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)
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function simple_subshell_ref()
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function simple_subshell_ref_sum()
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(
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declare -n sum_ref=$3
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sum_ref=$(($1+$2))
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echo "Value of sum in function with ref arguments: [$sum_ref]"
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)
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# Subsection 3.3
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@ -121,6 +121,86 @@ function fibonnaci_recursion() {
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fi
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}
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# main menu entry point
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echo "****Functions samples menu*****"
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PS3="Your choice (1,2,3 etc.):"
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options=("function_definitions" "function_input_args" "function_outputs" \
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"function_variables" "function_subshells" "function_redirections" \
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"function_recursion" "quit")
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select option in "${options[@]}"
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do
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case $option in
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"function_definitions")
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echo -e "\n"
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echo "**Different ways to define a function**"
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echo -e "No function keyword:"
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simple_function
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echo -e "\nNo function parantheses:"
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simple_function_no_parantheses
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echo -e "\nOmitting curly braces:"
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simple_for_loop
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echo -e "\n"
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;;
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"function_input_args")
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echo -e "\n"
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echo "**Passing inputs to a function**"
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simple_inputs lorem ipsum
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echo -e "\n"
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;;
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"function_outputs")
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echo -e "\n"
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echo "**Getting outputs from a function**"
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global_sum_outputs 1 2
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echo -e "1+2 using global variables: [$global_sum]"
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cs_sum=$(cs_sum_outputs 1 2)
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echo -e "1+2 using command substitution: [$cs_sum]"
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arg_ref_sum_outputs 1 2 arg_ref_sum
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echo -e "1+2 using argument references: [$arg_ref_sum]"
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echo -e "\n"
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;;
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"function_variables")
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echo -e "\n"
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echo "**Overriding variable scopes**"
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echo "Global value of variable: [$variable]"
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variable_scope
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echo -e "\n"
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;;
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"function_subshells")
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echo -e "\n"
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echo "**Running function in subshell**"
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echo "Global value of sum: [$subshell_sum]"
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simple_subshell_sum 1 2
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echo "Value of sum after subshell function with \
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global variables: [$subshell_sum]"
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subshell_sum_arg_ref=0
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simple_subshell_ref_sum 1 2 subshell_sum_arg_ref
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echo "Value of sum after subshell function with \
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ref arguments: [$subshell_sum_arg_ref]"
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echo -e "\n"
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;;
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"function_redirections")
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echo -e "\n"
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echo "**Function redirections**"
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echo -e "File input redirection:"
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redirection_in
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echo -e "Command input redirection:"
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redirection_in_ps
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;;
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# "timeout_input_read")
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# echo "Enter something in 5 seconds or less"
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# timeout_input_read
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# ;;
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# "exactly_n_read")
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# echo "Enter at least 11 characters or wait 5 seconds"
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# exactly_n_read
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# ;;
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"quit")
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break
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;;
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*) echo "Invalid option";;
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esac
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done
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#simple_function
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# simple_inputs one 'two three'
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# sum=$(simple_outputs 1 2)
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