Std
The Std registry provides a set of standard functions for common tasks, included by default, making it easy to perform basic operations without additional setup.
hello
The function returns a simple greeting string, "Hello!" It serves as a basic test function to verify that the system is working correctly.
Signature
Hello() string
{{ hello }} // Output: Hello!
default
The function returns the first non-empty value from a provided list of arguments. If the list is empty or the first value is empty, it returns a specified default value. If you're looking to find the first non-empty value from a list of multiple options, the Coalesce
function is a better choice.
Signature
Default(defaultValue any, given ...any) any
{{ nil | default "default" }} // Output: "default"
{{ "" | default "default" }} // Output: "default"
{{ "first" | default "default" }} // Output: "first"
{{ "first" | default "default" "second" }} // Output: "second"
empty
The function checks if the provided value is empty, returning true
if it is considered empty based on its type. This function is useful for determining whether a value is present or absent across different data types.
Signature
Empty(given any) bool
{{ nil | empty }} // Output: true
{{ "" | empty }} // Output: true
{{ 0 | empty }} // Output: true
{{ false | empty }} // Output: true
{{ struct{}{} | empty }} // Output: false
all
The function checks if all values in the provided variadic slice are non-empty. It returns true
only if every value is considered non-empty according to the criteria used by the Empty
method.
Signature
All(values ...any) bool
{{ 1, "hello", true | all }} // Output: true
{{ 1, "", true | all }} // Output: false
any
The function checks if any of the provided values are non-empty. It returns true
if at least one value is considered non-empty.
Signature
Any(values ...any) bool
{{ "", 0, false | any }} // Output: false
{{ "", 0, "text" | any }} // Output: true
coalesce
The function returns the first non-empty value from the provided list. If all values are empty, it returns nil
.
Signature
Coalesce(values ...any) any
{{ nil, "", "first", "second" | coalesce }} // Output: "first"
ternary
The function mimics the ternary conditional operator found in many programming languages. It returns trueValue
if the condition
is true; otherwise, it returns falseValue
.
Signature
Ternary(trueValue any, falseValue any, condition bool) any
{{ true | ternary "yes", "no" }} // Output: "yes"
{{ false | ternary "yes", "no" }} // Output: "no"
cat
The function concatenates a series of values into a single string, converting each value to its string representation and separating them with spaces. Nil values are skipped, and no trailing spaces are added.
Signature
Cat(values ...any) string
{{ "Hello", nil, 123, true | cat }} // Output: "Hello 123 true"
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