🔍

.key              # Get field
.key.nested       # Nested field
.["key-name"]     # Key with special chars
.key?             # Optional (no error if null)

.[0]              # First element
.[-1]             # Last element
.[2:5]            # Slice (index 2-4)
.[]               # All elements (iterate)

length            # Array/string length
keys              # Object keys as array
reverse           # Reverse array
sort              # Sort array
unique            # Remove duplicates
flatten           # Flatten nested arrays

select(condition)    # Filter by condition
map(f)               # Apply f to each element

# Examples
[1,2,3,4] | map(. * 2)              # [2,4,6,8]
.[] | select(.age > 18)             # Filter objects

{name: .name, age: .age}  # Create new object
{(.key): .value}          # Dynamic key
. + {new: "field"}        # Add field

[.items[].name]           # Collect into array
group_by(.category)       # Group by field
sort_by(.date)            # Sort by field

ascii_downcase    # Lowercase
ascii_upcase      # Uppercase
split(",")        # Split to array
join(",")         # Join array
test("regex")     # Regex test
gsub("a";"b")     # Replace all