Utilities.
var utils = require( '@stdlib/utils' );
Namespace containing utilities.
var o = utils;
// returns {...}
The namespace has the following sub-namespaces:
- anyByRight( collection, predicate[, thisArg ] ): test whether at least one element in a collection passes a test implemented by a predicate function, iterating from right to left.
- anyBy( collection, predicate[, thisArg ] ): test whether at least one element in a collection passes a test implemented by a predicate function.
- any( collection ): test whether at least one element in a collection is truthy.
- append( collection1, collection2 ): add elements from one collection to the end of another collection.
- bifurcateBy( collection, [options,] predicate ): split values into two groups according to a predicate function.
- bifurcate( collection, [options,] filter ): split values into two groups.
- countBy( collection, [options,] indicator ): group values according to an indicator function and return group counts.
- everyByRight( collection, predicate[, thisArg ] ): test whether all elements in a collection pass a test implemented by a predicate function, iterating from right to left.
- everyBy( collection, predicate[, thisArg ] ): test whether all elements in a collection pass a test implemented by a predicate function.
- every( collection ): test whether all elements in a collection are truthy.
- forEachRight( collection, fcn[, thisArg ] ): invoke a function for each element in a collection, iterating from the right to left.
- forEach( collection, fcn[, thisArg ] ): invoke a function for each element in a collection.
- groupBy( collection, [options,] indicator ): group values according to an indicator function.
- groupIn( obj, [options,] indicator ): group an object's own and inherited property values according to an indicator function.
- groupOwn( obj, [options,] indicator ): group an object's own property values according to an indicator function.
- group( collection, [options,] groups ): group values as arrays associated with distinct keys.
- inmapRight( collection, fcn[, thisArg ] ): invoke a function for each element in a collection and update the collection in-place, iterating from right to left.
- inmap( collection, fcn[, thisArg ] ): invoke a function for each element in a collection and update the collection in-place.
- keyByRight( collection, fcn[, thisArg ] ): convert a collection to an object whose keys are determined by a provided function and whose values are the collection values, iterating from right to left.
- keyBy( collection, fcn[, thisArg ] ): convert a collection to an object whose keys are determined by a provided function and whose values are the collection values.
- noneByRight( collection, predicate[, thisArg ] ): test whether all elements in a collection fail a test implemented by a predicate function, iterating from right to left.
- noneBy( collection, predicate[, thisArg ] ): test whether all elements in a collection fail a test implemented by a predicate function.
- none( collection ): test whether all elements in a collection are falsy.
- pop( collection ): remove and return the last element of a collection.
- prepend( collection1, collection2 ): add elements from one collection to the beginning of another collection.
- push( collection, ...items ): add one or more elements to the end of a collection.
- reduceRight( arr, initial, reducer[, thisArg ] ): apply a function against an accumulator and each element in an array while iterating from right to left and return the accumulated result.
- reduce( arr, initial, reducer[, thisArg ] ): apply a function against an accumulator and each element in an array and return the accumulated result.
- reduce2d( arr, initial, fcn[, thisArg] ): reduce the number of dimensions by one of a two-dimensional nested array by applying a function against an accumulator and each element along the innermost dimension and returning the accumulation results as a one-dimensional array.
- shift( collection ): remove and return the first element of a collection.
- someByRight( collection, n, predicate[, thisArg ] ): test whether a collection contains at least n elements which pass a test implemented by a predicate function, iterating from right to left.
- someBy( collection, n, predicate[, thisArg ] ): test whether a collection contains at least n elements which pass a test implemented by a predicate function.
- some( collection, n ): test whether a collection contains at least n elements which are truthy.
- tabulateBy( collection[, options,] indicator ): generate a frequency table according to an indicator function.
- tabulate( collection ): generate a frequency table.
- unshift( collection, ...items ): add one or more elements to the beginning of a collection.
- untilEachRight( collection, predicate, fcn[, thisArg ] ): until a test condition is true, invoke a function for each element in a collection, iterating from right to left.
- untilEach( collection, predicate, fcn[, thisArg ] ): until a test condition is true, invoke a function for each element in a collection.
- whileEachRight( collection, predicate, fcn[, thisArg ] ): while a test condition is true, invoke a function for each element in a collection, iterating from right to left.
- whileEach( collection, predicate, fcn[, thisArg ] ): while a test condition is true, invoke a function for each element in a collection.
- deepPluck( arr, path[, options] ): extract a nested property value from each element of an object array.
- find( arr, [opts,] clbk ): find elements in an array-like object that satisfy a test condition.
- flattenArray( arr[, options] ): flatten an array.
- objectFromEntries( entries ): create an object from key-value pairs.
- indexOf( arr, searchElement[, fromIndex] ): return the first index at which a given element can be found.
- pluck( arr, prop[, options] ): extract a property value from each element of an object array.
- unzip( arr[, idx] ): unzip a zipped array (i.e., a nested array of tuples).
- zip( arr1, arr2,...[, opts] ): generate array tuples from input arrays.
- setConfigurableReadOnlyAccessor( obj, prop, getter ): define a configurable read-only accessor.
- setConfigurableReadOnly( obj, prop, value ): define a configurable read-only property.
- setConfigurableReadWriteAccessor( obj, prop, getter, setter ): define a configurable read-write accessor.
- setConfigurableWriteOnlyAccessor( obj, prop, setter ): define a configurable write-only accessor.
- setMemoizedConfigurableReadOnly( obj, prop, fcn ): define a configurable memoized read-only object property.
- defineMemoizedProperty( obj, prop, descriptor ): define a memoized object property.
- setMemoizedReadOnly( obj, prop, fcn ): define a memoized read-only object property.
- setNonEnumerableProperty( obj, prop, value ): define a non-enumerable property.
- setNonEnumerableReadOnlyAccessor( obj, prop, getter ): define a non-enumerable read-only accessor.
- setNonEnumerableReadOnly( obj, prop, value ): define a non-enumerable read-only property.
- setNonEnumerableReadWriteAccessor( obj, prop, getter, setter ): define a non-enumerable read-write accessor.
- setNonEnumerableWriteOnlyAccessor( obj, prop, setter ): define a non-enumerable write-only accessor.
- defineProperties( obj, properties ): define (and/or modify) object properties.
- defineProperty( obj, prop, descriptor ): define (or modify) an object property.
- setReadOnlyAccessor( obj, prop, getter ): define a read-only accessor.
- setReadOnly( obj, prop, value ): define a read-only property.
- setReadWriteAccessor( obj, prop, getter, setter ): define a read-write accessor.
- setWriteOnlyAccessor( obj, prop, setter ): define a write-only accessor.
- objectEntriesIn( obj ): return an array of an object's own and inherited enumerable property key-value pairs.
- objectEntries( obj ): return an array of an object's own enumerable property key-value pairs.
- enumerablePropertiesIn( obj ): return an array of an object's own and inherited enumerable property names and symbols.
- enumerableProperties( obj ): return an array of an object's own enumerable property names and symbols.
- enumerablePropertySymbolsIn( obj ): return an array of an object's own and inherited enumerable symbol properties.
- enumerablePropertySymbols( obj ): return an array of an object's own enumerable symbol properties.
- flattenObject( obj[, options] ): flatten an object.
- getPrototypeOf( value ): return the prototype of a provided object.
- inheritedEnumerableProperties( obj[, level] ): return an array of an object's inherited enumerable property names and symbols.
- inheritedEnumerablePropertySymbols( obj[, level] ): return an array of an object's inherited enumerable symbol properties.
- inheritedKeys( obj[, level] ): return an array of an object's inherited enumerable property names.
- inheritedNonEnumerableProperties( obj[, level] ): return an array of an object's inherited non-enumerable property names and symbols.
- inheritedNonEnumerablePropertyNames( obj[, level] ): return an array of an object's inherited non-enumerable property names.
- inheritedNonEnumerablePropertySymbols( obj[, level] ): return an array of an object's inherited non-enumerable symbol properties.
- inheritedProperties( obj[, level] ): return an array of an object's inherited property names and symbols.
- inheritedPropertyDescriptor( obj, property[, level] ): return a property descriptor for an object's inherited property.
- inheritedPropertyDescriptors( obj[, level] ): return an object's inherited property descriptors.
- inheritedPropertyNames( obj[, level] ): return an array of an object's inherited enumerable and non-enumerable property names.
- inheritedPropertySymbols( obj[, level] ): return an array of an object's inherited symbol properties.
- inheritedWritableProperties( obj[, level] ): return an array of an object's inherited writable property names and symbols.
- inheritedWritablePropertyNames( obj[, level] ): return an array of an object's inherited writable property names.
- inheritedWritablePropertySymbols( obj[, level] ): return an array of an object's inherited writable symbol properties.
- keysIn( obj ): return an array of an object's own and inherited enumerable property names.
- mapKeys( obj, transform ): map keys from one object to a new object having the same values.
- mapValues( obj, transform ): map values from one object to a new object having the same keys.
- merge( target, source1[, source2[,...,sourceN]] ): merge and extend objects.
- nonEnumerablePropertiesIn( obj ): return an array of an object's own and inherited non-enumerable property names and symbols.
- nonEnumerableProperties( obj ): return an array of an object's own non-enumerable property names and symbols.
- nonEnumerablePropertyNamesIn( obj ): return an array of an object's own and inherited non-enumerable property names.
- nonEnumerablePropertyNames( obj ): return an array of an object's own non-enumerable property names.
- nonEnumerablePropertySymbolsIn( obj ): return an array of an object's own and inherited non-enumerable symbol properties.
- nonEnumerablePropertySymbols( obj ): return an array of an object's own non-enumerable symbol properties.
- nonIndexKeys( obj ): return an array of an object's own enumerable property names which are not integer indices.
- omitBy( obj, predicate ): return a partial object copy excluding properties for which a predicate (function) returns a truthy value.
- omit( obj, keys ): return a partial object copy excluding specified keys.
- pickArguments( fcn, indices[, thisArg] ): create a function that invokes a provided function with specified arguments.
- pickBy( obj, predicate ): return a partial object copy containing properties for which a predicate (function) returns a truthy value.
- pick( obj, keys ): return a partial object copy containing only specified keys.
- propertiesIn( obj ): return an array of an object's own and inherited property names and symbols.
- properties( obj ): return an array of an object's own enumerable and non-enumerable property names and symbols.
- propertyDescriptorIn( obj, property ): return a property descriptor for an object's own or inherited property.
- propertyDescriptor( obj, property ): return a property descriptor for an object's own property.
- propertyDescriptorsIn( obj ): return an object's own and inherited property descriptors.
- propertyDescriptors( obj ): return an object's own property descriptors.
- propertyNamesIn( obj ): return an array of an object's own and inherited enumerable and non-enumerable property names.
- propertyNames( obj ): return an array of an object's own enumerable and non-enumerable property names.
- propertySymbolsIn( obj ): return an array of an object's own and inherited symbol properties.
- propertySymbols( obj ): return an array of an object's own symbol properties.
- objectValuesIn( obj ): return an array of an object's own and inherited enumerable property values.
- objectValues( obj ): return an array of an object's own enumerable property values.
- writablePropertiesIn( obj ): return an array of an object's own and inherited writable property names and symbols.
- writableProperties( obj ): return an array of an object's own writable property names and symbols.
- writablePropertyNamesIn( obj ): return an array of an object's own and inherited writable property names.
- writablePropertyNames( obj ): return an array of an object's own writable property names.
- writablePropertySymbolsIn( obj ): return an array of an object's own and inherited writable symbol properties.
- writablePropertySymbols( obj ): return an array of an object's own writable symbol properties.
- argumentFunction( idx ): create an argument function.
- compose( ...fcn ): function composition.
- constantFunction( x ): constant function.
- curryRight( fcn[, arity][, thisArg] ): transform a function into a sequence of functions each accepting a single argument.
- curry( fcn[, arity][, thisArg] ): transform a function into a sequence of functions each accepting a single argument.
- doUntilEachRight( collection, fcn, predicate[, thisArg ] ): until a test condition is true, invoke a function for each element in a collection, iterating from right to left.
- doUntilEach( collection, fcn, predicate[, thisArg ] ): until a test condition is true, invoke a function for each element in a collection.
- doUntil( fcn, predicate[, thisArg ] ): invoke a function until a test condition is true.
- doWhileEachRight( collection, fcn, predicate[, thisArg ] ): while a test condition is true, invoke a function for each element in a collection, iterating from right to left.
- doWhileEach( collection, fcn, predicate[, thisArg ] ): while a test condition is true, invoke a function for each element in a collection.
- doWhile( fcn, predicate[, thisArg ] ): invoke a function while a test condition is true.
- filterArguments( fcn, predicate[, thisArg] ): create a function that invokes a provided function according to a predicate function.
- functionName( fcn ): determine a function's name.
- functionSequence( ...fcn ): function sequence.
- identity( x ): identity function.
- mapArguments( fcn, clbk[, thisArg] ): create a function that applies arguments to a provided function after transforming arguments according to a callback function.
- mapFun( fcn, n[, thisArg ] ): invoke a function n times and return an array of accumulated function return values.
- maskArguments( fcn, mask[, thisArg] ): create a function that invokes a provided function according to an argument mask.
- memoize( fcn[, hashFunction] ): memoize a function.
- noop(): function which does nothing.
- papplyRight( fcn[, ...args] ): partially apply function arguments from the right.
- papply( fcn[, ...args] ): partially apply function arguments.
- rejectArguments( fcn, predicate[, thisArg] ): create a function that invokes a provided function according to a predicate function.
- reorderArguments( fcn, indices[, thisArg] ): create a function that invokes a provided function with reordered arguments.
- reverseArguments( fcn[, thisArg] ): create a function that invokes a provided function with arguments in reverse order.
- uncurryRight( fcn[, arity][, thisArg] ): transform a curried function into a function invoked with multiple arguments.
- uncurry( fcn[, arity][, thisArg] ): transform a curried function into a function invoked with multiple arguments.
- until( predicate, fcn[, thisArg ] ): invoke a function until a test condition is true.
- whilst( predicate, fcn[, thisArg ] ): invoke a function while a test condition is true.
- trycatch( x, y ): if a function does not throw, return the function return value; otherwise, return y.
- tryFunction( fcn ): wrap a function in a try/catch block.
- tryRequire( id ): wrap require in a try/catch block.
- trythen( x, y ): if a function does not throw, return the function return value; otherwise, return the return value of a second function.
- constructorName( value ): determine the name of a value's constructor.
- convertPath( from, to ): convert between POSIX and Windows paths.
- copy( value[, level] ): copy or deep clone a value to an arbitrary depth.
- decorateAfter( fcn, arity, after[, thisArg] ): decorate a provided function such that the function's return value is provided as an argument to another function.
- dirname( path ): return a directory name.
- dsv: utilities for working with data formatted as delimiter-separated values (DSV).
- rescape( str ): escape a regular expression string or pattern.
- evil( str ): alias for eval global.
- extname( filename ): return a filename extension.
- getGlobal( [codegen] ): return the global object.
- ifelse( bool, x, y ): if a condition is truthy, return x; otherwise, return y.
- ifthen( bool, x, y ): if a condition is truthy, invoke x; otherwise, invoke y.
- inherit( ctor, superCtor ): implement prototypical inheritance by replacing the prototype of one constructor with the prototype of another constructor.
- objectKeys( obj ): return an array of an object's own enumerable property names.
- mapReduceRight( arr, initial, mapper, reducer[, thisArg ] ): perform a single-pass map-reduce operation against each element in an array while iterating from right to left and return the accumulated result.
- mapReduce( arr, initial, mapper, reducer[, thisArg ] ): perform a single-pass map-reduce operation against each element in an array and return the accumulated result.
- mapRight( arr, fcn[, thisArg] ): apply a function to each element in an array and assign the result to an element in an output array, iterating from right to left.
- map( arr, fcn[, thisArg] ): apply a function to each element in an array and assign the result to an element in an output array.
- map2Right( x, y, fcn[, thisArg] ): apply a function to elements in two input arrays while iterating from right to left and assign the results to an output array.
- map2( x, y, fcn[, thisArg] ): apply a function to elements in two input arrays and assign the results to an output array.
- map2d( arr, fcn[, thisArg] ): apply a function to each nested element in an array of arrays and assign the result to a nested element in a new array of arrays.
- map3d( arr, fcn[, thisArg] ): apply a function to each nested element in a three-dimensional nested array and assign the result to a nested element in a new three-dimensional nested array.
- map4d( arr, fcn[, thisArg] ): apply a function to each nested element in a four-dimensional nested array and assign the result to a nested element in a new four-dimensional nested array.
- map5d( arr, fcn[, thisArg] ): apply a function to each nested element in a five-dimensional nested array and assign the result to a nested element in a new five-dimensional nested array.
- naryFunction( fcn, arity[, thisArg] ): create a function that invokes a provided function with a specified number of arguments.
- nativeClass( value ): determine the specification defined classification of an object.
- nextTick( clbk[, ...args] ): add a callback to the "next tick queue".
- openURL(): open a URL.
- parallel( files, [options,] clbk ): execute scripts in parallel.
- parseJSON( str[, reviver] ): parse a string as JSON.
- parseNDJSON( str[, reviver] ): parse a string containing serialized newline-delimited JSON (NDJSON).
- realmax( dtype ): return the maximum finite value capable of being represented by a numeric real type.
- realmin( dtype ): return the smallest positive normal value capable of being represented by a numeric real type.
- reFromString( str ): create a regular expression from a regular expression string.
- safeintmax( dtype ): return the maximum safe integer capable of being represented by a numeric real type.
- safeintmin( dtype ): return the minimum safe integer capable of being represented by a numeric real type.
- sizeOf( dtype ): return the size (in bytes) of the canonical binary representation of a specified numeric type.
- timeit( code, [options,] clbk ): time a snippet.
- typemax( dtype ): return the maximum value of a specified numeric type.
- typemin( dtype ): return the minimum value of a specified numeric type.
- typeOf( value ): determine a value's type.
var objectKeys = require( '@stdlib/utils/keys' );
var utils = require( '@stdlib/utils' );
console.log( objectKeys( utils ) );