//step 1
list1 = ['dog','cat','bird','snake']
//step 2
list1[2]
//step 3
list1.slice(0,2)
//step 4
list_last = {
let list_last = list1.concat('last')
return list_last
}
//step 4b
list1
//step 5
list1.length
//step 6
list_new = {
let list_new = list_last
list_new.splice(4,1,'new')
return list_new
}
array1=['I', 'am', 'learning','Javascript','to','munge','large','datasets','and','visualize','them']
//step 1: Convert array into a normal sentence with join()
array1.join(" ")
//step 2: Reverse the order of the list
array1.reverse()
//step 3: Sort the list using JS default sort order
array1.sort()
//step 4: Modify the sort to do a case insensitive alphabetic sort
array_case_insensitive = array1.sort(function(a,b) {
a = a.toLowerCase();
b = b.toLowerCase();
if (a == b) return 0;
if (a > b) return 1;
return -1;
});
//step 5: Show array in reverse alphabetic order
array_case_insensitive.reverse()
html`
<h3>These are my five favorite colors!</h3>
<ul>
<li style='background:forestgreen'>Forest Green</li>
<li style='background:chocolate'>Chocolate</li>
<li style='background:orange'>Orange</li>
<li style='background:goldenrod'>Goldenrod</li>
<li style='background:darkviolet'>Violet</li>
</ul>
`
md`***The current time and date is ${Date(now)}.***`
places_array = {
const data = {"Places":[
{'location':'South America','name':'Ushuaia','latitude':-54.805833,'longitude':-68.301947,'country':'Argentina'},
{'location':'Africa','name':'Aksum','latitude':14.132366,'longitude':38.738350,'country':'Ethiopia'},
{'location':'North America','name':'Crater Lake','latitude':42.942806,'longitude':-122.115580,'country':'United States'},
{'location':'Africa','name':'Abu Simbel','latitude':22.337222,'longitude':31.625413,'country':'Egypt'},
{'location':'Europe','name':'Alhambra','latitude':37.176534,'longitude':-3.588402,'country':'Spain'}
]};
return data;
}
function uppercaseThisArray(arrayname){
let first = arrayname.Places[0].name.toUpperCase()
let second = arrayname.Places[1].name.toUpperCase()
//return arrayname.Places[1].name.toUpperCase();
return "First: "+first+" Second: "+second;
}
uppercaseThisArray(places_array)
One platform to build and deploy the best data apps
Experiment and prototype by building visualizations in live JavaScript notebooks. Collaborate with your team and decide which concepts to build out.
Use Observable Framework to build data apps locally. Use data loaders to build in any language or library, including Python, SQL, and R.
Seamlessly deploy to Observable. Test before you ship, use automatic deploy-on-commit, and ensure your projects are always up-to-date.