DEV Community

Test your JavaScript skills Series' Articles

Back to Coderslang: Become a Software Engineer's Series
JS Test #1: Type conversion in JavaScript
Cover image for JS Test #1: Type conversion in JavaScript
coderslang profile

JS Test #1: Type conversion in JavaScript

#programming #codenewbie #javascript #beginners
186
Comments 4
1 min read
JS Test #2: How to create an array in JavaScript
Cover image for JS Test #2: How to create an array in JavaScript
coderslang profile

JS Test #2: How to create an array in JavaScript

#programming #beginners #codenewbie #javascript
34
Comments 2
1 min read
JS Test #3: Adding strings to numbers and booleans
Cover image for JS Test #3: Adding strings to numbers and booleans
coderslang profile

JS Test #3: Adding strings to numbers and booleans

#beginners #javascript #codenewbie #webdev
29
Comments
1 min read
JS Test #4: try/catch
Cover image for JS Test #4: try/catch
coderslang profile

JS Test #4: try/catch

#beginners #codenewbie #javascript #programming
28
Comments 2
1 min read
JS Test #5: Can you use an arrow function as a getter?
Cover image for JS Test #5: Can you use an arrow function as a getter?
coderslang profile

JS Test #5: Can you use an arrow function as a getter?

#beginners #programming #javascript #codenewbie
22
Comments
1 min read
JS Test #6: Variable number of arguments
Cover image for JS Test #6: Variable number of arguments
coderslang profile

JS Test #6: Variable number of arguments

#beginners #codenewbie #javascript #webdev
14
Comments
1 min read
JS Test #7: Is this an array?
Cover image for JS Test #7: Is this an array?
coderslang profile

JS Test #7: Is this an array?

#beginners #codenewbie #javascript #programming
13
Comments 3
1 min read
JS Test #8: Zero timeout
Cover image for JS Test #8: Zero timeout
coderslang profile

JS Test #8: Zero timeout

#beginners #javascript #codenewbie
10
Comments
1 min read
JS Test #9: Promise.reject + try/catch
Cover image for JS Test #9: Promise.reject + try/catch
coderslang profile

JS Test #9: Promise.reject + try/catch

#beginners #javascript #codenewbie
15
Comments 1
1 min read
JS Test #11: Scope
Cover image for JS Test #11: Scope
coderslang profile

JS Test #11: Scope

#javascript #learn #codenewbie #beginners
14
Comments
1 min read
JS Test #10: null + undefined
Cover image for JS Test #10: null + undefined
coderslang profile

JS Test #10: null + undefined

#beginners #learn #javascript #codenewbie
14
Comments 1
1 min read
JS Test #12: Math.min()
Cover image for JS Test #12: Math.min()
coderslang profile

JS Test #12: Math.min()

#beginners #learn #codenewbie #javascript
10
Comments
1 min read
JavaScript Interview #13: Big numbers
Cover image for JavaScript Interview #13: Big numbers
coderslang profile

JavaScript Interview #13: Big numbers

#beginners #javascript #codenewbie #interview
13
Comments 3
1 min read
JavaScript Interview Question #14: 0.1 + 0.2 = ?
Cover image for JavaScript Interview Question #14: 0.1 + 0.2 = ?
coderslang profile

JavaScript Interview Question #14: 0.1 + 0.2 = ?

#beginners #javascript #codenewbie #webdev
42
Comments 4
1 min read
JavaScript Interview Question #15: Getter function
Cover image for JavaScript Interview Question #15: Getter function
coderslang profile

JavaScript Interview Question #15: Getter function

#beginners #javascript #codenewbie #webdev
29
Comments 2
1 min read
JavaScript Interview Question #16: typeof NaN
Cover image for JavaScript Interview Question #16: typeof NaN
coderslang profile

JavaScript Interview Question #16: typeof NaN

#beginners #codenewbie #javascript #interview
17
Comments
1 min read
JavaScript Interview Question #17: Sum of Two Empty Arrays
Cover image for JavaScript Interview Question #17: Sum of Two Empty Arrays
coderslang profile

JavaScript Interview Question #17: Sum of Two Empty Arrays

#beginners #javascript #codenewbie #webdev
66
Comments 16
1 min read
JavaScript Interview Question #18: What's the sum of two booleans in JavaScript?
Cover image for JavaScript Interview Question #18: What's the sum of two booleans in JavaScript?
coderslang profile

JavaScript Interview Question #18: What's the sum of two booleans in JavaScript?

#beginners #codenewbie #javascript #webdev
49
Comments 8
1 min read
JavaScript Interview Question #19: Catching the rejected Promise
Cover image for JavaScript Interview Question #19: Catching the rejected Promise
coderslang profile

JavaScript Interview Question #19: Catching the rejected Promise

#beginners #javascript #webdev #codenewbie
25
Comments 2
1 min read
JavaScript Interview Question #20: Can you sum arrays with objects in JS?
Cover image for JavaScript Interview Question #20: Can you sum arrays with objects in JS?
coderslang profile

JavaScript Interview Question #20: Can you sum arrays with objects in JS?

#beginners #javascript #webdev #codenewbie
21
Comments
1 min read
JavaScript Interview Question #21: ISO Date
Cover image for JavaScript Interview Question #21: ISO Date
coderslang profile

JavaScript Interview Question #21: ISO Date

#beginners #webdev #javascript #codenewbie
17
Comments
1 min read
JavaScript Interview Question #22: How `toString` works in JavaScript?
Cover image for JavaScript Interview Question #22: How `toString` works in JavaScript?
coderslang profile

JavaScript Interview Question #22: How `toString` works in JavaScript?

#beginners #javascript #codenewbie #webdev
24
Comments
1 min read
JavaScript Interview Question #23: Array.splice
Cover image for JavaScript Interview Question #23: Array.splice
coderslang profile

JavaScript Interview Question #23: Array.splice

#beginners #javascript #codenewbie #webdev
25
Comments 2
2 min read
JavaScript Interview Question #24: Adding new properties to JS strings
Cover image for JavaScript Interview Question #24: Adding new properties to JS strings
coderslang profile

JavaScript Interview Question #24: Adding new properties to JS strings

#javascript #beginners #codenewbie #webdev
14
Comments 2
1 min read
JavaScript Interview Question #25: Immediate Promise.resolve
Cover image for JavaScript Interview Question #25: Immediate Promise.resolve
coderslang profile

JavaScript Interview Question #25: Immediate Promise.resolve

#beginners #javascript #codenewbie #webdev
31
Comments
1 min read
JavaScript Interview Question #26: Are these dates equal?
Cover image for JavaScript Interview Question #26: Are these dates equal?
coderslang profile

JavaScript Interview Question #26: Are these dates equal?

#beginners #codenewbie #javascript #webdev
20
Comments
1 min read
JavaScript Interview Question #27: Handling errors in JavaScript Promise chains
Cover image for JavaScript Interview Question #27: Handling errors in JavaScript Promise chains
coderslang profile

JavaScript Interview Question #27: Handling errors in JavaScript Promise chains

#javascript #webdev #beginners #codenewbie
30
Comments 4
1 min read
JavaScript Interview Question #28: Resolve and reject at the same time
Cover image for JavaScript Interview Question #28: Resolve and reject at the same time
coderslang profile

JavaScript Interview Question #28: Resolve and reject at the same time

#beginners #javascript #codenewbie #webdev
25
Comments 2
1 min read
JavaScript Interview Question #29: Slice and dice
Cover image for JavaScript Interview Question #29: Slice and dice
coderslang profile

JavaScript Interview Question #29: Slice and dice

#javascript #beginners #codenewbie #webdev
29
Comments
1 min read
JavaScript Interview Question #30: Reject inside resolve
Cover image for JavaScript Interview Question #30: Reject inside resolve
coderslang profile

JavaScript Interview Question #30: Reject inside resolve

#webdev #javascript #beginners #codenewbie
11
Comments
1 min read
JavaScript Interview Question #31: Big or small
Cover image for JavaScript Interview Question #31: Big or small
coderslang profile

JavaScript Interview Question #31: Big or small

#javascript #beginners #codenewbie #webdev
30
Comments 2
1 min read
JavaScript Interview Question #32: 0.1 + 0.1 + 0.1 === 0.3
Cover image for JavaScript Interview Question #32: 0.1 + 0.1 + 0.1 === 0.3
coderslang profile

JavaScript Interview Question #32: 0.1 + 0.1 + 0.1 === 0.3

#beginners #javascript #webdev #codenewbie
53
Comments 4
1 min read
JavaScript Interview Question #33: Add two empty arrays and check the type
Cover image for JavaScript Interview Question #33: Add two empty arrays and check the type
coderslang profile

JavaScript Interview Question #33: Add two empty arrays and check the type

#javascript #beginners #webdev #codenewbie
45
Comments 6
1 min read
JavaScript Interview Question #34: Different ways to get the current date in JS
Cover image for JavaScript Interview Question #34: Different ways to get the current date in JS
coderslang profile

JavaScript Interview Question #34: Different ways to get the current date in JS

#webdev #beginners #codenewbie #javascript
30
Comments
1 min read
JavaScript Interview Question #35: What is faster, zero timeout, or immediate resolve?
Cover image for JavaScript Interview Question #35: What is faster, zero timeout, or immediate resolve?
coderslang profile

JavaScript Interview Question #35: What is faster, zero timeout, or immediate resolve?

#beginners #javascript #codenewbie #webdev
50
Comments 5
1 min read
JavaScript Interview Question #36: Can you add a new property to the JS array?
Cover image for JavaScript Interview Question #36: Can you add a new property to the JS array?
coderslang profile

JavaScript Interview Question #36: Can you add a new property to the JS array?

#webdev #javascript #beginners #codewnewbie
31
Comments 3
1 min read
JavaScript Interview Question #37: What's the type of a single argument provided to the split function?
Cover image for JavaScript Interview Question #37: What's the type of a single argument provided to the split function?
coderslang profile

JavaScript Interview Question #37: What's the type of a single argument provided to the split function?

#javascript #webdev #beginners #codenewbie
29
Comments
1 min read
JavaScript Interview Question #38: Can you add multiple arrays in JavaScript?
Cover image for JavaScript Interview Question #38: Can you add multiple arrays in JavaScript?
coderslang profile

JavaScript Interview Question #38: Can you add multiple arrays in JavaScript?

#javascript #beginners #codenewbie #webdev
43
Comments 8
1 min read
JavaScript Interview Question #39: How does setTimeout work inside the loop?
Cover image for JavaScript Interview Question #39: How does setTimeout work inside the loop?
coderslang profile

JavaScript Interview Question #39: How does setTimeout work inside the loop?

#beginners #javascript #codenewbie #webdev
45
Comments 4
1 min read
JavaScript Interview Question #40: What is the type of `undefined` in JS?
Cover image for JavaScript Interview Question #40: What is the type of `undefined` in JS?
coderslang profile

JavaScript Interview Question #40: What is the type of `undefined` in JS?

#beginners #webdev #javascript #codenewbie
30
Comments 5
1 min read
JavaScript Interview Question #41: Going above MAX_SAFE_INTEGER
Cover image for JavaScript Interview Question #41: Going above MAX_SAFE_INTEGER
coderslang profile

JavaScript Interview Question #41: Going above MAX_SAFE_INTEGER

#beginners #webdev #javascript #codenewbie
16
Comments 1
1 min read
JavaScript Interview Question #42: How Math.max works in JS
Cover image for JavaScript Interview Question #42: How Math.max works in JS
coderslang profile

JavaScript Interview Question #42: How Math.max works in JS

#beginners #javascript #webdev #codenewbie
22
Comments
1 min read
JavaScript Interview Question #43: Object.toString vs Array.toString
Cover image for JavaScript Interview Question #43: Object.toString vs Array.toString
coderslang profile

JavaScript Interview Question #43: Object.toString vs Array.toString

#webdev #javascript #codenewbie #beginners
15
Comments 4
1 min read
JavaScript Interview Question #44: Number vs BigInt in JS
Cover image for JavaScript Interview Question #44: Number vs BigInt in JS
coderslang profile

JavaScript Interview Question #44: Number vs BigInt in JS

#javascript #beginners #codenewbie #webdev
19
Comments 2
1 min read
JavaScript Interview Question #45: Сurrency formatting in JS
Cover image for JavaScript Interview Question #45: Сurrency formatting in JS
coderslang profile

JavaScript Interview Question #45: Сurrency formatting in JS

#javascript #beginners #codenewbie #webdev
52
Comments
1 min read
JavaScript Interview Question #46: Length of JS functions
Cover image for JavaScript Interview Question #46: Length of JS functions
coderslang profile

JavaScript Interview Question #46: Length of JS functions

#javascript #beginners #codenewbie #webdev
65
Comments 10
1 min read
JavaScript Interview Question #47: How Object.setPrototypeOf works in JS
Cover image for JavaScript Interview Question #47: How Object.setPrototypeOf works in JS
coderslang profile

JavaScript Interview Question #47: How Object.setPrototypeOf works in JS

#javascript #webdev #beginners #codenewbie
26
Comments
2 min read
JavaScript Interview Question #48: Dog-sized Cat
Cover image for JavaScript Interview Question #48: Dog-sized Cat
coderslang profile

JavaScript Interview Question #48: Dog-sized Cat

#webdev #beginners #javascript #codenewbie
36
Comments 2
1 min read
JavaScript Interview Question #49: Add a new array element by index
Cover image for JavaScript Interview Question #49: Add a new array element by index
coderslang profile

JavaScript Interview Question #49: Add a new array element by index

#beginners #codenewbie #webdev #javascript
45
Comments 5
1 min read
JavaScript Interview Question #50: How does Intl.Collator work in JS
Cover image for JavaScript Interview Question #50: How does Intl.Collator work in JS
coderslang profile

JavaScript Interview Question #50: How does Intl.Collator work in JS

#javascript #webdev #beginners #codenewbie
26
Comments
1 min read