Built-in Object Methods

Djazair allows calling methods directly on primitive arrays, maps, and strings using standard dot syntax.

String Methods

Method	Description
`length()`	Character count
`upper()`	Uppercase conversion
`lower()`	Lowercase conversion
`strip()`	Trim whitespace both ends
`lStrip()`	Trim whitespace from left
`rStrip()`	Trim whitespace from right
`contains(substr)`	Check if substring exists
`find(substr)`	Return index of substring (alias for index)
`count(substr)`	Count occurrences
`index(needle)`	First index (-1 if not found)
`split(sep?)`	Split into array (default: whitespace)
`join(list)`	Join array using string as separator
`slice(start, end?)`	Extract substring
`subStr(start, len?)`	Extract by start and length
`replace(old, new)`	Replace all
`reverse()`	Reverse string in-place
`reversed()`	Return reversed string copy
`repeat(n)`	Repeat n times
`zFill(width)`	Zero-pad to given width
`center(width)`	Center string in field of given width
`lJust(width)`	Left-justify in field of given width
`rJust(width)`	Right-justify in field of given width
`startsWith(prefix)`	Check prefix
`endsWith(suffix)`	Check suffix
`capitalize()`	First char uppercase
`title()`	Title case
`swapCase()`	Swap uppercase/lowercase
`charCodeAt(i)`	Character code at index
`isAlpha()`	Check if alphabetic
`isAlnum()`	Check if alphanumeric
`isDigit()`	Check if digit
`isLower()`	Check if lowercase
`isUpper()`	Check if uppercase
`isSpace()`	Check if whitespace
`concat(...)`	Concatenate multiple strings

Method	Description
`length()`	Number of elements
`append(v)`	Add at end
`pop(index?)`	Remove and return last element (or at index)
`insert(i, v)`	Insert at index
`remove(v)`	Remove first occurrence of value
`reverse()`	Reverse array in-place
`reversed()`	Return reversed copy (original unchanged)
`index(val\|cb)`	Index of value or first element matching callback (-1 if not found)
`extend(arr)`	Append all elements from another array
`sort(desc?)`	Sort in-place
`sorted(desc?)`	Return sorted copy (original unchanged)
`copy()`	Shallow copy
`clear()`	Remove all elements
`contains(v)`	Check membership
`count(v)`	Count occurrences of value
`concat(other)`	Merge arrays
`slice(s, e?)`	Extract sub-array
`join(sep)`	Join elements into string with separator
`flatten()`	Flatten one level
`unique()`	Remove duplicate values
`all()`	All elements are truthy
`any()`	Any element is truthy
`min()`	Minimum value
`max()`	Maximum value
`sum()`	Sum of numeric elements
`map(fn)`	Transform each element
`filter(fn)`	Keep elements where callback returns truthy
`reduce(fn, init)`	Accumulate using callback
`find(val)`	Find first element matching value or callback (Null if not found)
`every(fn)`	All elements pass callback
`some(fn)`	Any element passes callback

Method	Description
`length()`	Number of entries
`keys()`	Array of keys
`values()`	Array of values
`items()`	Array of [key, value] pairs
`has(key)`	Check key existence
`get(key)`	Get value (Null if missing)
`copy()`	Shallow copy
`clear()`	Remove all entries
`pop(key)`	Remove and return value
`setDefault(k, v)`	Set only if key missing
`update(other)`	Merge entries from another map