On the JS in every () and some () method

. 1, some ():
      some () method for detecting elements in the array satisfies the specified conditions.

• If there is an element in the array satisfies the condition, the expression returns true, the remaining elements will not perform detection.
• If the array does not meet the conditions of the elements, false is returned.

var arr = [4, 5, 6, 7, 8, 9]; 
 
console.log( arr.some( function( item, index, array ){ 
    console.log( 'item=' + item + ',index='+index+',array='+array ); 
    return item > 6; 
}));

result:

Note: some true if they are no longer carried out, will not be an empty array detection, does not change the original array

2、every():

      every () is run on each item in the array to a given function, the function returns true if for each, it returns true.

• If the array has a detected element is not satisfied, then the whole expression evaluates to false, and the remaining elements will not be detected.
• If all elements conditions are met, it returns true.

var arr = [4, 5, 6, 7, 8, 9]; 
 
console.log( arr.every( function( item, index, array ){ 
    console.log( 'item=' + item + ',index='+index+',array='+array ); 
    return item > 6; 
}));

result:

Note: every encounter false if it is no longer carried out, will not be an empty array detection, does not change the original array