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Commit ab65e09

Browse files
solved some tasks related to the Array and String methods
1 parent 8dc1375 commit ab65e09

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6 files changed

+172
-14
lines changed

6 files changed

+172
-14
lines changed

‎Array methods/script.js

Lines changed: 27 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -94,9 +94,8 @@
9494
// } )
9595
// console.log(lettersLenght);
9696
// const numbers = [10,20,30,40,50];
97-
// const discountPrice = numbers.map(item=>{
98-
// return item - (item / 10)
99-
// })
97+
// const discountPrice = numbers.map(item=> item - (item / 10)
98+
// )
10099
// console.log(discountPrice)
101100

102101

@@ -195,10 +194,11 @@
195194
/// SLICE METHOD //
196195

197196
// const numbers =[1,2,3,4,5]
198-
// // const num2 = numbers.slice(1,4)
199-
// const num2 = numbers.slice(-5)
197+
// const num3 = numbers.slice(1,4)
198+
// const num2 = numbers.slice(-Infinity)
200199
// console.log(num2);
201-
// console.log(numbers);
200+
// console.log(num3);
201+
// console.clear()
202202

203203

204204
// const participants = ['Alice','Patrick','Malvina','Johanna'];
@@ -277,10 +277,11 @@
277277

278278
// REVERSE METHOD //
279279
// const numbers = [1,2,3,4,5];
280-
// // const newArr = numbers.concat().reverse();
280+
// const newArr1 = numbers.concat().reverse();
281281
// const newArr = [...numbers].reverse();
282282
// console.log(newArr);
283-
// console.log(numbers);
283+
// console.log(numbers);
284+
// console.log(newArr1);
284285

285286
// const str = ['Coding is fun! '];
286287
// const res = str
@@ -533,4 +534,21 @@
533534
// num++;
534535
// }
535536
// })
536-
// console.log(num);
537+
// console.log(num);
538+
539+
// const numbers = [];
540+
// for(let i = 0;i<=100;i++){
541+
// numbers.push(i)
542+
// }
543+
// console.log(numbers);
544+
545+
// numbers.sort((a,b) =>{
546+
// if( a % 2 == 0 && b % 2 !==0){
547+
// return -1
548+
// }else if( a % 2 !== 0 && b % 2 ==0){
549+
// return 1
550+
// }else {
551+
// return 0;
552+
// }
553+
// })
554+
// console.log(numbers);

‎Array methods/tempCodeRunnerFile.js

Lines changed: 3 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,3 @@
1+
const numbers =[1,2,3,4,5,5,4,3,6,7,8];
2+
const res = Array.from(new Set(numbers));
3+
console.log(res)

‎CheatSheet for Array methods JS.txt

Lines changed: 79 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,79 @@
1+
Array methods CheatSheet:
2+
3+
Method Name: forEach()
4+
Example Update each element in an array by multiplying it by 2.
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6+
const numbers = [1, 2, 3, 4, 5];
7+
8+
numbers.forEach(function(number, index, array) {
9+
array[index] = number * 2;
10+
});
11+
12+
console.log(numbers);
13+
14+
Does it mutate the source or not: The forEach() method does not mutate the source array. It only performs an operation on each element of the array without modifying it.
15+
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Argument List and Meaning:
17+
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callback (required): The function to execute on each element. It takes three arguments:
19+
currentValue: The current element being processed in the array.
20+
index (optional): The index of the current element being processed.
21+
array (optional): The array that forEach() is being applied to.
22+
What it returns: The forEach() method does not return anything. It performs an operation on each element of the array, but it does not produce a new array or a return value.
23+
24+
------------------------------------------------------------------------------------------------------------------------------------------
25+
26+
Method Name: map()
27+
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Example 1: Double each element in an array.
29+
30+
const numbers = [1, 2, 3, 4, 5];
31+
32+
const doubledNumbers = numbers.map(function(number) {
33+
return number * 2;
34+
});
35+
36+
console.log(doubledNumbers);
37+
38+
39+
Does it mutate the source or not: The map() method does not mutate the source array. It creates a new array with the results of calling a provided function on each element of the original array.
40+
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Argument List and Meaning:
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callback (required): The function to execute on each element. It takes three arguments:
44+
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currentValue: The current element being processed in the array.
46+
index (optional): The index of the current element being processed.
47+
array (optional): The array that map() is being applied to.
48+
What it returns: The map() method returns a new array with the results of calling the provided function on each element of the original array.
49+
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Please note that the arrow function syntax can also be used instead of traditional function syntax in the examples.
51+
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------------------------------------------------------------------------------------------------------------------------------------------
53+
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Method Name: filter()
55+
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Example: Filter out even numbers from an array.
57+
58+
const numbers = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
59+
60+
const evenNumbers = numbers.filter(function(number) {
61+
return number % 2 === 0;
62+
});
63+
64+
console.log(evenNumbers);
65+
66+
Does it mutate the source or not: The filter() method does not mutate the source array. It creates a new array containing elements that pass the specified filtering condition.
67+
68+
Argument List and Meaning:
69+
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callback (required): The function to test each element of the array. It takes three arguments:
71+
72+
currentValue: The current element being processed in the array.
73+
index (optional): The index of the current element being processed.
74+
array (optional): The array that filter() is being applied to.
75+
What it returns: The filter() method returns a new array with the elements that pass the filtering condition specified by the provided function.
76+
77+
Please note that the arrow function syntax can also be used instead of traditional function syntax in the example.
78+
79+

‎String methods/script.js

Lines changed: 6 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -193,10 +193,10 @@
193193
// SYNTAXES //
194194
//string.matchAll()
195195
// let text = 'The rain in SPAIN stays mainly in the plain';
196-
// // let s = text.matchAll('ain')//it returns all matched strings inside referenceString and their position all stuff
197-
// // console.log(...s);
198-
// // let a = text.matchAll(/ain/g)////it returns all matched strings inside referenceString and their position all stuff
199-
// // console.log(...a);
196+
// let s = text.matchAll('ain')//it returns all matched strings inside referenceString and their position all stuff
197+
// console.log(...s);
198+
// let a = text.matchAll(/ain/g)////it returns all matched strings inside referenceString and their position all stuff
199+
// console.log(...a);
200200
// let b = text.matchAll(/ain/gi)////it returns all matched strings inside referenceString and their position all stuff but both cases lowercase and upperCase
201201
// console.log(...b);
202202
// let e = text.matchAll(/w/gi)//if method failed it returns empty array [];
@@ -302,4 +302,5 @@
302302

303303
// SYNTAXES //
304304
// String.raw(strings,...substitution)
305-
//String.raw'templateStrings'
305+
//String.raw'templateStrings'
306+

‎String methods/tempCodeRunnerFile.js

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1 @@
1+
console.log(numbers);

‎interview.js

Lines changed: 56 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,56 @@
1+
// const num = [1,2,3,4,5,6,7,8,9,10];
2+
// num.forEach(item =>{
3+
// console.log(item);
4+
// })
5+
// function double(arr){
6+
// return arr.map(item => item * 2)
7+
// }
8+
// console.log(double(num))
9+
// const even = num.filter(value => value % 2 == 0)
10+
// const odd =num.filter(value => value % 2 !== 0)
11+
// console.log(even);
12+
// console.log(odd);
13+
// const sumEv = even.reduce((acc,num)=>{
14+
// return acc + num
15+
// });
16+
// console.log(sumEv);
17+
18+
19+
// const sumOdd = odd.reduce((acc,num)=>{
20+
// return acc + num
21+
// })
22+
// console.log(sumOdd);
23+
// console.log(num[num.length -1]);
24+
// const c = even.concat(odd)
25+
// console.log(c);
26+
// const isEven = even.every(value => value % 2 ==0)
27+
28+
// const arr = new Array(100).fill(1)
29+
// const arr1 =[2, 3, 4,[5, 6, 7, [5, 6, 7, 9]], [5, 6, 7]]
30+
// const arr2 = arr1.flat(Infinity)
31+
// const is = Array.isArray(arr1)
32+
// console.log(is);
33+
34+
// includes()
35+
// IndexOf()
36+
// find()
37+
38+
39+
// const names = ['Ali','tim','kim','tom']
40+
// console.log(names.join('-'));
41+
42+
// const arrStr = names.join('-')
43+
44+
// const names2 = names.slice(1,3)
45+
46+
// const str = ' Mohammed Moin khan '
47+
// console.log(str.trim());
48+
49+
// at
50+
// isArray()
51+
// splice()
52+
53+
const num = [1,2,3,4,5,6,7];
54+
const str = 'Rim skdfokfokefe'
55+
console.log(num.at(0));
56+
console.log(str.at(0));

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