Documentation Index
Fetch the complete documentation index at: https://docs.peaka.com/llms.txt
Use this file to discover all available pages before exploring further.
Unary Operators
Example
The exclamation mark negates the boolean that appears next to it.
Binary Operators
| Operation | Symbol |
|---|
| Add, Concat | + |
| Subtract | - |
| Multiply | * |
| Divide | / |
| Divide and floor | // |
| Modulus | % |
| Power of | ^ |
| Logical AND | && |
| Logical OR | || |
Comparisons
| Comparison | Symbol |
|---|
| Equal | == |
| Not equal | != |
| Greater than | > |
| Greater than or equal | >= |
| Less than | < |
| Less than or equal | <= |
| Element in array or string | in |
in
The in operator can be used to check for a substring:
"Cad" in "Ron Cadillac", and it can be used to check for an array element:
"coarse" in ['fine', 'medium', 'coarse']. However, the == operator is used
behind-the-scenes to search arrays, so it should not be used with arrays of
objects. The following expression returns false: {a: 'b'} in [{a: 'b'}].
Ternary operator
Conditional expressions are used to check if the first segment returns a correct value. If that’s the case, the value in the next segment is applied. Otherwise, the other value is applied. If the next segmeent is missing, the test result itself will be used instead.
| Expression | Result |
|---|
| "" ? “Full” : “Empty” | Empty |
| ”foo” in “foobar” ? “Yes” : “No” | Yes |
{agent: "Archer"}.agent ?: "Kane" | Archer |
Native Types
| Type | Examples |
|---|
| Booleans | true, false |
| Strings | ”Hello “user"", ‘Hey there!’ |
| Numerics | 6, -7.2, 5, -3.14159 |
| Objects | {hello: "world!"} |
| Arrays | [‘hello’, ‘world!’] |
Groups
Parentheses work just how you’d expect them to:
| Expression | Result |
|---|
| (83 + 1) / 2 | 42 |
| 1 < 3 && (4 > 2 || 2 > 4) | true |
Identifiers
Access variables in the context object by just typing their name. Objects can
be accessed with dot notation, or by using brackets to access a dynamic
property name.
Example context:
{
name: {
first: "Malory",
last: "Archer"
},
exes: [
"Nikolai Jakov",
"Len Trexler",
"Burt Reynolds"
],
lastEx: 2
}
| Expression | Result |
|---|
| name.first | Malory |
| name[‘la’ + ‘st’] | Archer |
| exes[2] | Burt Reynolds |
| exes[lastEx - 1] | Len Trexler |
Functions
In JEXL, common built-in functions are readily available, but also functions library is extended with lodash functions.
You can use lodash functions from this link.
Additionally, you can read our documentation on JEXL to learn more about these functions.
Example
Check out the JEXL codes below:
Find Min
{{ min([65, 42, 87, 88]) }}
// => 42
{{ reverse([1, 2, 3, 4]) }}
// => [4, 3, 2, 1]
{{ eq({ a:1 }, { a:1 }) }}
// => true
{{ eq(3, 4) }}
// => false
{{ concat([1], 2, 3, 4) }}
// => [1, 2, 3, 4]
{{ reverse([1, 2, 3]) }}
// => 3
