The operation method of iterating every and some in JavaScript array
This article mainly introduces the JavaScript array iteration every and some of the operation methods related knowledge, detailed and easy to understand, simple and fast operation, with a certain reference value, I believe that everyone will read this JavaScript array iteration every and some of the operation methods of the article will have some gains, let's take a look at it.
Array.every（）
The every () method checks whether all array values pass the test.
This example checks if all array values are greater than 18:
examples
var numbers = [45, 4, 9, 16, 25];
var allOver18 = numbers.every（myFunction）;
function myFunction（value, index, array） {
return value > 18;
}
Note that this function takes three parameters:
item value
item index
array itself
If the callback function uses only the first parameter (value), the other parameters can be omitted:
examples
var numbers = [45, 4, 9, 16, 25];
var allOver18 = numbers.every（myFunction）;
function myFunction（value） {
return value > 18;
}
Array.some（）
Some () methods check whether certain array values pass the test.
This example checks if certain array values are greater than 18:
examples
var numbers = [45, 4, 9, 16, 25];
var someOver18 = numbers.some（myFunction）;
function myFunction（value, index, array） {
return value > 18;
}
Note that this function takes three parameters:
item value
item index
array itself
All browsers support Array.some (), except Internet Explorer 8 or earlier.
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