devtalks india

ALT ['a', 'b'].concat(['c']) //['a','b','c'] ['a', 'b'].join('~') //'a~b' ['a','b','c'].slice(1) //['b', 'c' ] ['a','b','b'].indexOf('b') // 1 ['a','b','b'].lastIndexOf('b') //2 ['a','b','c'].forEach(x => console.log(x)) [1,2,3].every(x => x < 10 )//true [1,2,3].some(x => x < 2 )//true [1,2,3].filter(x => x < 2 )//[1] [1, 2, 3].map(x => x * 2 )//[2, 4, 6] [1, 2, 3].reduce((x,y) => x * y)//6 [2, 15,3].sort()//[ 15, 2, 3 ] 😅 [1, 2, 3].reverse()//[ 3, 2, 1 ] [1, 2, 3].length//3 const arr = [1, 2, 3] const x=arr.shift()//arr=[ 2, 3 ],x=1 const x=arr.unshift(9)//arr=[ 9,1,2,3],x=4 const x=arr.pop()//arr=[ 1, 2 ],x=3 const x=arr.push(5)//arr=[1,2,3,5],x=4 const arr=['a','b','c','d'];const mod = arr.splice(1,2,'z');//arr=['a','z','d'],mod=['b','c']