cheatsheet for JavaScript

cheatsheet.md

• String - substring, replace, split, match, includes

• Array - slice/splice, push/pop, map/filter/forEach, join, sort, some/every/includes/find/findIndex/findLastIndex/indexOf/lastIndexOf,

• Object - keys, values

• CSS.selectors - a .a #id

• CSS.alignment - justify-content, align-items

• CSS.location - center, space-between, space-around

• Date Time - Date.now(), Date.parse("..."), new Date("..."), getFullYear(),getUTCDate(),getDay(), getUTCHours(), getTime(), getMinutes(), getSeconds(), getMilliseconds()

• JSON - JSON.stringify(ob,null,2)

Date Time, JSON Beautify.md

python	javascript
json.dumps(ob,indent=2)	JSON.stringify(ob,null,2)

Operations Comparison.md

Same

python	javascript
x[i]	x[i]
is.pop(i)	is.pop(i)

Different

python	javascript
is.append(i)	is.push(i)
x[::-1]	x.reverse()
str[:9]	str.substring(0,9)
x[-1]	x.slice(-1)
x[1:5]	x.slice(1,5)
is+js	[...is,...js]
is+js	is.concat(js)
is[:9]+x+is[9:]	is.splice(9,0,x)
is[:9]+js+is[9:]	is.splice(9,0,...js)
is[9]=x	is.splice(9,1,x)
x in y	y.includes(x)
any(i>0 for i in is)	is.some(i=>i>0)
all(i>0 for i in is)	is.every(i=>i>0)