100 methods string and array es6

Certainly, here is a list of 100 terms related to ES6 array methods and string methods, along with brief explanations:

ES6 Array Methods:

1. forEach: Iterates over array elements, invoking a callback for each.
2. map: Creates a new array by applying a function to each element.
3. filter: Returns a new array with elements that meet a specified condition.
4. find: Returns the first array element that satisfies a testing function.
5. findIndex: Returns the index of the first array element that satisfies a testing function.
6. some: Checks if at least one element satisfies a condition.
7. every: Checks if all elements satisfy a condition.
8. reduce: Applies a function to reduce the array to a single value.
9. includes: Checks if an array contains a specific element.
10. indexOf: Returns the index of the first occurrence of a specified element.

Certainly, let's compare the usage of these array methods in both ES6 (ECMAScript 2015) and traditional JavaScript.

1. forEach:

• ES6:
  

   const array = [1, 2, 3];
   array.forEach(element => console.log(element));
  

• Traditional:
  

   var array = [1, 2, 3];
   array.forEach(function(element) {
     console.log(element);
   });
  

1. map:

• ES6:
  

   const array = [1, 2, 3];
   const newArray = array.map(element => element * 2);
  

• Traditional:
  

   var array = [1, 2, 3];
   var newArray = array.map(function(element) {
     return element * 2;
   });
  

1. filter:

• ES6:
  

   const array = [1, 2, 3, 4, 5];
   const filteredArray = array.filter(element => element > 2);
  

• Traditional:
  

   var array = [1, 2, 3, 4, 5];
   var filteredArray = array.filter(function(element) {
     return element > 2;
   });
  

1. find:

• ES6:
  

   const array = [1, 2, 3, 4, 5];
   const foundElement = array.find(element => element > 2);
  

• Traditional:
  

   var array = [1, 2, 3, 4, 5];
   var foundElement = array.find(function(element) {
     return element > 2;
   });
  

1. findIndex:

• ES6:
  

   const array = [1, 2, 3, 4, 5];
   const foundIndex = array.findIndex(element => element > 2);
  

• Traditional:
  

   var array = [1, 2, 3, 4, 5];
   var foundIndex = array.findIndex(function(element) {
     return element > 2;
   });
  

1. some:

• ES6:
  

   const array = [1, 2, 3, 4, 5];
   const hasSome = array.some(element => element > 2);
  

• Traditional:
  

   var array = [1, 2, 3, 4, 5];
   var hasSome = array.some(function(element) {
     return element > 2;
   });
  

1. every:

• ES6:
  

   const array = [1, 2, 3, 4, 5];
   const allMeetCondition = array.every(element => element > 0);
  

• Traditional:
  

   var array = [1, 2, 3, 4, 5];
   var allMeetCondition = array.every(function(element) {
     return element > 0;
   });
  

1. reduce:

• ES6:
  

   const array = [1, 2, 3, 4, 5];
   const sum = array.reduce((accumulator, element) => accumulator + element, 0);
  

• Traditional:
  

   var array = [1, 2, 3, 4, 5];
   var sum = array.reduce(function(accumulator, element) {
     return accumulator + element;
   }, 0);
  

1. includes:

• ES6:
  

   const array = [1, 2, 3];
   const hasElement = array.includes(2);
  

• Traditional:
  

   var array = [1, 2, 3];
   var hasElement = array.indexOf(2) !== -1;
  

1. indexOf:

- ES6 (Note: `indexOf` is the same in both ES6 and traditional):

  ```javascript
  const array = [1, 2, 3];
  const index = array.indexOf(2);
  ```

- Traditional:

  ```javascript
  var array = [1, 2, 3];
  var index = array.indexOf(2);
  ```

// forEach
// ES6:
const array = [1, 2, 3];
array.forEach(element => console.log(element));
// Output: 1
// 2
// 3

// Traditional:
var array = [1, 2, 3];
array.forEach(function(element) {
console.log(element);
});
// Output: 1
// 2
// 3

// map
// ES6:
const array = [1, 2, 3];
const newArray = array.map(element => element * 2);
// Output: newArray: [2, 4, 6]

// Traditional:
var array = [1, 2, 3];
var newArray = array.map(function(element) {
return element * 2;
});
// Output: newArray: [2, 4, 6]

// filter
// ES6:
const array = [1, 2, 3, 4, 5];
const filteredArray = array.filter(element => element > 2);
// Output: filteredArray: [3, 4, 5]

// Traditional:
var array = [1, 2, 3, 4, 5];
var filteredArray = array.filter(function(element) {
return element > 2;
});
// Output: filteredArray: [3, 4, 5]

// find
// ES6:
const array = [1, 2, 3, 4, 5];
const foundElement = array.find(element => element > 2);
// Output: foundElement: 3

// Traditional:
var array = [1, 2, 3, 4, 5];
var foundElement = array.find(function(element) {
return element > 2;
});
// Output: foundElement: 3

// findIndex
// ES6:
const array = [1, 2, 3, 4, 5];
const foundIndex = array.findIndex(element => element > 2);
// Output: foundIndex: 2

// Traditional:
var array = [1, 2, 3, 4, 5];
var foundIndex = array.findIndex(function(element) {
return element > 2;
});
// Output: foundIndex: 2

// some
// ES6:
const array = [1, 2, 3, 4, 5];
const hasSome = array.some(element => element > 2);
// Output: hasSome: true

// Traditional:
var array = [1, 2, 3, 4, 5];
var hasSome = array.some(function(element) {
return element > 2;
});
// Output: hasSome: true

// every
// ES6:
const array = [1, 2, 3, 4, 5];
const allMeetCondition = array.every(element => element > 0);
// Output: allMeetCondition: true

// Traditional:
var array = [1, 2, 3, 4, 5];
var allMeetCondition = array.every(function(element) {
return element > 0;
});
// Output: allMeetCondition: true

// reduce
// ES6:
const array = [1, 2, 3, 4, 5];
const sum = array.reduce((accumulator, element) => accumulator + element, 0);
// Output: sum: 15

// Traditional:
var array = [1, 2, 3, 4, 5];
var sum = array.reduce(function(accumulator, element) {
return accumulator + element;
}, 0);
// Output: sum: 15

// includes
// ES6:
const array = [1, 2, 3];
const hasElement = array.includes(2);
// Output: hasElement: true

// Traditional:
var array = [1, 2, 3];
var hasElement = array.indexOf(2) !== -1;
// Output: hasElement: true

// indexOf
// ES6 (Note: indexOf is the same in both ES6 and traditional):
const array = [1, 2, 3];
const index = array.indexOf(2);
// Output: index: 1

// Traditional:
var array = [1, 2, 3];
var index = array.indexOf(2);
// Output: index: 1

These examples demonstrate the usage of array methods in both ES6 and traditional JavaScript syntax. ES6 introduces arrow functions and enhanced syntax for better readability and conciseness.

1. lastIndexOf: Returns the index of the last occurrence of a specified element.
2. sort: Sorts array elements based on a compare function.
3. reverse: Reverses the order of array elements.
4. slice: Extracts a portion of an array into a new array.
5. splice: Changes the contents of an array by removing or replacing existing elements.
6. concat: Combines two or more arrays.
7. isArray: Checks if an object is an array.
8. from: Creates a new array from an iterable object.
9. of: Creates a new array with variable arguments.
10. entries: Returns an iterable containing key/value pairs for array entries.

Certainly, let's provide example code for each of the additional array methods you've listed in both ES6 and traditional JavaScript.

// lastIndexOf
// ES6:
const array = [1, 2, 3, 4, 2, 5];
const lastIndex = array.lastIndexOf(2);
// Output: lastIndex: 4

// Traditional:
var array = [1, 2, 3, 4, 2, 5];
var lastIndex = array.lastIndexOf(2);
// Output: lastIndex: 4

// sort
// ES6:
const array = [3, 1, 4, 1, 5, 9, 2, 6];
const sortedArray = array.sort((a, b) => a - b);
// Output: sortedArray: [1, 1, 2, 3, 4, 5, 6, 9]

// Traditional:
var array = [3, 1, 4, 1, 5, 9, 2, 6];
var sortedArray = array.sort(function(a, b) {
  return a - b;
});
// Output: sortedArray: [1, 1, 2, 3, 4, 5, 6, 9]

// reverse
// ES6:
const array = [1, 2, 3, 4, 5];
const reversedArray = array.reverse();
// Output: reversedArray: [5, 4, 3, 2, 1]

// Traditional:
var array = [1, 2, 3, 4, 5];
var reversedArray = array.reverse();
// Output: reversedArray: [5, 4, 3, 2, 1]

// slice
// ES6:
const array = [1, 2, 3, 4, 5];
const slicedArray = array.slice(1, 4);
// Output: slicedArray: [2, 3, 4]

// Traditional:
var array = [1, 2, 3, 4, 5];
var slicedArray = array.slice(1, 4);
// Output: slicedArray: [2, 3, 4]

// splice
// ES6:
const array = [1, 2, 3, 4, 5];
const splicedArray = array.splice(2, 2, 6, 7);
// Output: splicedArray: [3, 4]

// Traditional:
var array = [1, 2, 3, 4, 5];
var splicedArray = array.splice(2, 2, 6, 7);
// Output: splicedArray: [3, 4]

// concat
// ES6:
const array1 = [1, 2, 3];
const array2 = [4, 5, 6];
const concatenatedArray = array1.concat(array2);
// Output: concatenatedArray: [1, 2, 3, 4, 5, 6]

// Traditional:
var array1 = [1, 2, 3];
var array2 = [4, 5, 6];
var concatenatedArray = array1.concat(array2);
// Output: concatenatedArray: [1, 2, 3, 4, 5, 6]

// isArray
// ES6:
const isArrayES6 = Array.isArray([1, 2, 3]);
// Output: isArrayES6: true

// Traditional:
var isArrayTraditional = Array.isArray([1, 2, 3]);
// Output: isArrayTraditional: true

// from
// ES6:
const iterable = 'hello';
const arrayFromIterable = Array.from(iterable);
// Output: arrayFromIterable: ['h', 'e', 'l', 'l', 'o']

// Traditional:
var iterable = 'hello';
var arrayFromIterable = Array.from(iterable);
// Output: arrayFromIterable: ['h', 'e', 'l', 'l', 'o']

// of
// ES6:
const arrayOf = Array.of(1, 2, 3);
// Output: arrayOf: [1, 2, 3]

// Traditional (Note: No direct equivalent in traditional JavaScript, Array.of is an ES6 feature):
var arrayOfTraditional = [1, 2, 3];
// Output: arrayOfTraditional: [1, 2, 3]

// entries
// ES6:
const array = ['a', 'b', 'c'];
const entriesIterator = array.entries();
// Output: entriesIterator: Object [Array Iterator] {}

// Traditional (Note: No direct equivalent in traditional JavaScript, entries is an ES6 feature):
var array = ['a', 'b', 'c'];
var entriesIteratorTraditional = array.entries();
// Output: entriesIteratorTraditional: Object [Array Iterator] {}

These examples demonstrate the usage of the additional array methods in both ES6 and traditional JavaScript syntax.

1. keys: Returns an iterable containing keys for array entries.
2. values: Returns an iterable containing values for array entries.
3. copyWithin: Copies a sequence of array elements within the array.
4. fill: Fills array elements with a static value.
5. flat: Flattens nested arrays.
6. flatMap: Maps each element using a function and flattens the result.
7. Symbol.iterator: Symbol used to define an iterator method.
8. Array.from: Creates a new array from an array-like or iterable object.
9. Array.of: Creates a new array with the given elements.
10. Array.prototype[@@unscopables]: Symbol used to exclude array methods from the 'with' statement.
11. ArrayBuffer: A binary data buffer.
12. TypedArray: An array-like view for handling binary data with specific data types.
13. ArrayBuffer.prototype.slice: Creates a new ArrayBuffer with a portion of the original.
14. ArrayBuffer.isView: Checks if an object is a TypedArray view.
15. ArrayBuffer.prototype.byteLength: Returns the length (in bytes) of an ArrayBuffer.
16. ArrayBuffer.prototype.byteOffset: Returns the byte offset of a TypedArray from the start of its ArrayBuffer.
17. ArrayBuffer.prototype.constructor: Returns the function that created an object's prototype.
18. ArrayBuffer.prototype.toString: Returns a string representation of an ArrayBuffer.
19. ArrayBuffer.prototype.slice: Extracts a portion of an ArrayBuffer into a new ArrayBuffer.

ES6 String Methods:

1. charAt: Returns the character at a specified index.
2. charCodeAt: Returns the Unicode value of the character at a specified index.
3. concat: Combines two or more strings.
4. includes: Checks if a string contains another string.
5. endsWith: Checks if a string ends with a specified value.
6. startsWith: Checks if a string starts with a specified value.
7. indexOf: Returns the index of the first occurrence of a specified value.
8. lastIndexOf: Returns the index of the last occurrence of a specified value.
9. match: Searches a string for a specified pattern and returns the matches.
10. matchAll: Returns an iterator of all matches for a specified pattern.
11. replace: Replaces a specified value or pattern with another value.
12. search: Searches a string for a specified value or pattern.
13. slice: Extracts a portion of a string and returns it as a new string.
14. split: Splits a string into an array of substrings based on a specified delimiter.
15. substring: Extracts characters between two specified indices.
16. toLowerCase: Converts a string to lowercase.
17. toUpperCase: Converts a string to uppercase.
18. trim: Removes whitespace from both ends of a string.
19. padStart: Pads a string with a specified character until it reaches a specified length.
20. padEnd: Pads a string's end with a specified character until it reaches a specified length.
21. repeat: Returns a new string by repeating the original string a specified number of times.
22. normalize: Returns the Unicode Normalization Form of a string.
23. String.raw: Returns a raw string representation of a template literal.
24. String.fromCharCode: Returns a string created by using the specified sequence of Unicode values.
25. String.fromCodePoint: Returns a string created by using the specified Unicode code points.
26. String.prototype.codePointAt: Returns a non-negative integer representing the Unicode code point at a given position.
27. String.prototype.includes: Checks if a string contains another string.
28. String.prototype.endsWith: Checks if a string ends with a specified value.
29. String.prototype.startsWith: Checks if a string starts with a specified value.
30. String.prototype.repeat: Returns a new string repeated a specified number of times.
31. String.prototype.trimStart: Removes whitespace from the beginning of a string.
32. String.prototype.trimEnd: Removes whitespace from the end of a string.
33. String.prototype.trimLeft: Removes whitespace from the beginning of a string.
34. String.prototype.trimRight: Removes whitespace from the end of a string.
35. String.prototype[@@iterator]: Returns a new Iterator object that iterates over the code points of a string.
36. String.prototype.toLocaleLowerCase: Returns the calling string converted to lowercase, according to any locale-specific case mappings.
37. String.prototype.toLocaleUpperCase: Returns the calling string converted to uppercase, according to any locale-specific case mappings.
38. String.prototype.padStart: Pads the current string with a given string (repeated, if needed) so that the resulting string reaches a given length.
39. String.prototype.padEnd: Pads the current string with a given string (repeated, if needed) so that the resulting string reaches a given length.
40. String.prototype.slice: Extracts a section of a string and returns it as a new string.
41. String.prototype.substring: Returns a subset of a string between one index and another.
42. String.prototype.substr: Returns the characters in a string beginning at the specified location through the specified number of characters.
43. String.prototype.link: Creates an HTML anchor element for the specified URL.
44. String.prototype.fontcolor: Returns an HTML string with a element using the specified color.
45. String.prototype.fontsize: Returns an HTML string with a element using the specified font size.
46. String.prototype.anchor: Creates an HTML anchor element for the specified URL.
47. **

String.prototype.small:** Returns an HTML string with a element.

1. String.prototype.blink: Returns an HTML string with a element.
2. String.prototype.bold: Returns an HTML string with a element.
3. String.prototype.fixed: Returns an HTML string with a element.
4. String.prototype.strike: Returns an HTML string with a element.
5. String.prototype.sup: Returns an HTML string with a ^element.
6. String.prototype.sub: Returns an HTML string with a _element.
7. String.prototype.big: Returns an HTML string with a element.
8. String.prototype.italics: Returns an HTML string with an element.
9. String.prototype.small: Returns an HTML string with a element.
10. String.prototype.sup: Returns an HTML string with a ^element.
11. String.prototype.sub: Returns an HTML string with a _element.
12. String.prototype.link: Creates an HTML anchor element for the specified URL.
13. String.prototype.fontcolor: Returns an HTML string with a element using the specified color.
14. String.prototype.fontsize: Returns an HTML string with a element using the specified font size.