Js array operating mobile for encapsulation

//1.Swap two array elements

export  function swapArr(arr, index1, index2) {
    
arr[index1] = arr.splice(index2, 1, arr[index1])[0];

return arr;

}

//2.Brings an element to the top

export  function toFirst(fieldData,index) {
    
if(index!=0){
    
// fieldData[index] = fieldData.splice(0, 1, fieldData[index])[0]; This method swaps places with another element,

fieldData.unshift(fieldData.splice(index , 1)[0]);

}

}

//3.Moves the specified element up one space

export  function upGo(fieldData,index){
    
if(index!=0){
    
fieldData[index] = fieldData.splice(index-1, 1, fieldData[index])[0];

}else{
    
fieldData.push(fieldData.shift());

}

}

//4.Moves the specified element down one space

export  function downGo(fieldData,index) {
    
if(index!=fieldData.length-1){
    
fieldData[index] = fieldData.splice(index+1, 1, fieldData[index])[0];

}else{
    
fieldData.unshift( fieldData.splice(index,1)[0]);

}

}

//5.Swap two elements in an array

export function swapArr(arr, index1, index2) {
    
arr[index1] = arr.splice(index2, 1, arr[index1])[0];

return arr;

}

//6.Move an element anywhere in the array to the end

export function toEnd(arr,index) {
    
arr.push(arr[index]);

arr.splice(index,1);

return arr;

}

//7.Array of deduplicated values,Any number of arrays can be filled,Either a single array can be deduplicated,It is also possible to merge multiple arrays to remove duplicates

//数组合并去重

export function combine(){
    
let arr = [].concat.apply([], arguments); //没有去重复的新数组

return Array.from(new Set(arr));

}

//8.删除指定元素,The first parameter is the array whose elements are to be removed,The second parameter is the element value to delete,The third value is whether strict mode is enabled(Variable types are strictly compared) 例如removeArr([1,2,3,4,5],2,false) 返回[1,3,4,5] 例如removeArr([1,2,3,4,5],2,true) 返回[1,2,3,4,5]

export function removeArr (arr,val,strict) {
    
let index;

if(strict===true){
    
index = arr.findIndex(x=>x===value);

}else{
    
index = arr.findIndex(x=>x==value);

}

if (index > -1) {
    
arr.splice(index, 1);

}

}


export function swapArr(arr, index1, index2) {
    
arr[index1] = arr.splice(index2, 1, arr[index1])[0];

return arr;

}