pull/103/head
Asabeneh 4 years ago
parent 8d0e1b0ecd
commit 585c33e790

@ -272,7 +272,7 @@ console.log(count++) // 0
console.log(count) // 1
```
We use most of the time post-increment. At leas you should remember how to use post-increment operator.
We use most of the time post-increment. At least you should remember how to use post-increment operator.
### Decrement Operator
@ -571,7 +571,7 @@ console.log(`${date}/${month}/${year} ${hours}:${minutes}`) // 4/1/2020 0:56
1. Slope is (m = y2-y1/x2-x1). Find the slope between point (2, 2) and point(6,10)
1. Compare the slope of above two questions.
1. Calculate the value of y (y = x^2 + 6x + 9). Try to use different x values and figure out at what x value y is 0.
1. Writ a script that prompt a user to enters hours and rate per hour. Calculate pay of the person?
1. Writ a script that prompt a user to enter hours and rate per hour. Calculate pay of the person?
```sh
Enter hours: 40

@ -11,6 +11,7 @@
<a href="https://www.linkedin.com/in/asabeneh/" target="_blank">Asabeneh Yetayeh</a><br>
<small> January, 2020</small>
</sub>
</div>
[<< Day 9](../09_Day_Higher_order_functions/09_day_higher_order_functions.md) | [Day 11>>](../11_Day_Destructuring_and_spreading/11_day_destructuring_and_spreading.md)
@ -67,7 +68,7 @@ const languages = [
'French',
'Spanish',
'English',
'French'
'French',
]
const setOfLangauges = new Set(languages)
@ -88,7 +89,7 @@ const languages = [
'French',
'Spanish',
'English',
'French'
'French',
]
const setOfLangauges = new Set(languages)
@ -183,7 +184,7 @@ const languages = [
'French',
'Spanish',
'English',
'French'
'French',
]
const langSet = new Set(languages)
console.log(langSet) // Set(4) {"English", "Finnish", "French", "Spanish"}
@ -193,7 +194,7 @@ const counts = []
const count = {}
for (const l of langSet) {
const filteredLang = languages.filter(lng => lng === l)
const filteredLang = languages.filter((lng) => lng === l)
console.log(filteredLang) // ["English", "English", "English"]
counts.push({ lang: l, count: filteredLang.length })
}
@ -201,11 +202,11 @@ console.log(counts)
```
```js
[
;[
{ lang: 'English', count: 3 },
{ lang: 'Finnish', count: 1 },
{ lang: 'French', count: 2 },
{ lang: 'Spanish', count: 1 }
{ lang: 'Spanish', count: 1 },
]
```
@ -254,7 +255,7 @@ let b = [3, 4, 5, 6]
let A = new Set(a)
let B = new Set(b)
let c = a.filter(num => B.has(num))
let c = a.filter((num) => B.has(num))
let C = new Set(c)
console.log(C)
@ -276,7 +277,7 @@ let b = [3, 4, 5, 6]
let A = new Set(a)
let B = new Set(b)
let c = a.filter(num => !B.has(num))
let c = a.filter((num) => !B.has(num))
let C = new Set(c)
console.log(C)
@ -306,7 +307,7 @@ Map(0) {}
countries = [
['Finland', 'Helsinki'],
['Sweden', 'Stockholm'],
['Norway', 'Oslo']
['Norway', 'Oslo'],
]
const map = new Map(countries)
console.log(map)
@ -347,7 +348,7 @@ Helsinki
### Checking key in Map
Check if a key exist in a map using *has* method. It returns *true* or *false*.
Check if a key exist in a map using _has_ method. It returns _true_ or _false_.
```js
console.log(countriesMap.has('Finland'))
@ -416,28 +417,30 @@ const countries = ['Finland', 'Sweden', 'Norway']
```js
// Your output should look like this
console.log(mostSpokenLanguages(countries, 10))
[
{'English':91},
{'French':45},
{'Arabic':25},
{'Spanish':24},
{'Russian':9},
{'Portuguese':9},
{'Dutch':8},
{'German':7},
{'Chinese':5},
{'Swahili':4},
{'Serbian':4}]
console.log(mostSpokenLanguages(countries, 10))[
({ English: 91 },
{ French: 45 },
{ Arabic: 25 },
{ Spanish: 24 },
{ Russian: 9 },
{ Portuguese: 9 },
{ Dutch: 8 },
{ German: 7 },
{ Chinese: 5 },
{ Swahili: 4 },
{ Serbian: 4 })
]
// Your output should look like this
console.log(mostSpokenLanguages(countries, 3))
```
[
{'English':91},
{'French':45},
{'Arabic':25}
]
```
@ -445,3 +448,4 @@ const countries = ['Finland', 'Sweden', 'Norway']
[<< Day 9](../09_Day_Higher_order_functions/09_day_higher_order_functions.md) | [Day 11>>](../11_Day_Destructuring_and_spreading/11_day_destructuring_and_spreading.md)
```

@ -57,7 +57,7 @@ Destructuring is a way to unpack arrays, and objects and assigning to a distinct
```js
const names = ['Asabeneh', 'Brook', 'David', 'John']
let [firstPerson, secondPerson, ThirdPerson, fourth Person] = names
let [firstPerson, secondPerson, thirdPerson, fourth Person] = names
console.log(firstName, secondPerson,thirdPerson, fourthPerson)
```

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