I'm trying to make some coordinate plane functions on React native. But I'm having a problem that I don't know how to get the next element on my array.
This is my array:
[
{"M":["0","0"]},
{"H":"100"},
{"V":"0"},
{"H":"100"},
{"V":"100"},
{"H":"0"},
{"V":"100"},
{"H":"0"},
{"V":"0"},
]
This is my function:
const rotate = (pathArray, angle) =>{
if (angle > 0){
let vCordinate;
return pathArray.map((cordinate)=>{
if(Object.entries(cordinate)[0][0] == "M"){
let mCordinate = Object.entries(cordinate)[0][1];
mCordinate[0] = (parseInt(mCordinate[0]) * Math.cos(angle)) - (parseInt(mCordinate[1]) * Math.sin(angle));
mCordinate[1] = (parseInt(mCordinate[1]) * Math.cos(angle)) + (parseInt(mCordinate[0]) * Math.sin(angle));
return {[Object.entries(cordinate)[0][0]]: mCordinate};
}
//LOGIC TO GET NEXT ELEMENT
if(Object.entries(cordinate)[0][0] == "H"){
let hCordinate = Object.entries(cordinate)[0][1];
vCordinate = Object.entries(cordinate)[0][1]
return {[Object.entries(cordinate)[0][0]]: vCordinate};
}
if(Object.entries(cordinate)[0][0] == "V"){
return {[Object.entries(cordinate)[0][0]]: vCordinate};
}
})
}
return pathArray;
}
In this point I need to get the next element when I've hit "H".
How to do this?