JavaScript Array some () method
Examples
Detecting whether the array element is greater than 18:
var ages = [3, 10, 18, 20];
function checkAdult (age) {
return age> = 18;
}
function myFunction () {
document.getElementById ( "demo") .innerHTML = ages.some (checkAdult);
}
function checkAdult (age) {
return age> = 18;
}
function myFunction () {
document.getElementById ( "demo") .innerHTML = ages.some (checkAdult);
}
The output is:
true
try it"
Definition and Usage
some () method for the detection of elements in the array if a specified condition (function provided) meet.
some () method will be executed sequentially for each element of the array:
- If there is one element satisfies the condition, the expression returns true, the remaining elements will no longer perform detection.
- If you do not meet the conditions of the elements, it returns false.
Note: some () does not detect an empty array.
Note: some () does not change the original array.
Browser Support
Figures in the table represent the first browser to support the method version number.
| method | |||||
|---|---|---|---|---|---|
| some () | Yes | 9 | 1.5 | Yes | Yes |
grammar
array.some(function(currentValue,index,arr),thisValue)
Parameter Description
| parameter | description | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| function (currentValue, index, arr) | have to. Function, each element of the array will perform this function function parameters:
| ||||||||
| thisValue | Optional. As the callback object use, passed to the function, it is used as "this" value. If you omit thisValue, "this" value "undefined" |
technical details
| return value: | Boolean value. If there are elements in the array satisfies the condition returns true, otherwise returns false. |
|---|---|
| JavaScript version: | 1.6 |
More examples
Examples
Detecting whether there are elements in the array ages greater than the value of the input box:
<p> Minimum age: <input type = "number" id = "ageToCheck" value = "18"> </ p>
<button onclick = "myFunction () "> point I </ button>
<p> Analyzing the results: <span id = "demo" > </ span> </ p>
<Script>
var ages = [4, 12, 16, 20];
function checkAdult (age) {
return age> = document.getElementById ( "ageToCheck ") .value;
}
function myFunction () {
document.getElementById ( "demo") .innerHTML = ages.some (checkAdult);
}
</ Script>
<button onclick = "myFunction () "> point I </ button>
<p> Analyzing the results: <span id = "demo" > </ span> </ p>
<Script>
var ages = [4, 12, 16, 20];
function checkAdult (age) {
return age> = document.getElementById ( "ageToCheck ") .value;
}
function myFunction () {
document.getElementById ( "demo") .innerHTML = ages.some (checkAdult);
}
</ Script>
try it"