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								id: 587d7dab367417b2b2512b6f
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											2021-03-15 14:01:16 -06:00
										 
									 
								 
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								title: 使用 some 方法检查数组中是否有元素是否符合条件
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											2018-10-10 18:03:03 -04:00
										 
									 
								 
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								challengeType: 1
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								forumTopicId: 301314
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								dashedName: use-the-some-method-to-check-that-any-elements-in-an-array-meet-a-criteria
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								---
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								# --description--
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								`some` 方法用于检测数组中*任何*元素是否满足指定条件。 如果有一个元素满足条件,返回布尔值 `true`,反之返回 `false`。
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								举个例子,下面的代码检测数组`numbers`中是否有元素小于 10:
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								```js
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								var numbers = [10, 50, 8, 220, 110, 11];
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								numbers.some(function(currentValue) {
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								  return currentValue < 10;
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								});
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								```
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								`some` 方法将返回 `true`。
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								# --instructions--
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								在 `checkPositive` 函数值中使用 `some` 检查 `arr` 中是否有元素为正数。 函数应返回一个布尔值。
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								# --hints--
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								应该使用 `some` 方法。
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								```js
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								assert(code.match(/\.some/g));
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								```
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								`checkPositive([1, 2, 3, -4, 5])` 应返回 `true`。
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								```js
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								assert(checkPositive([1, 2, 3, -4, 5]));
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								```
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								`checkPositive([1, 2, 3, 4, 5])` 应返回 `true`。
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								```js
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								assert(checkPositive([1, 2, 3, 4, 5]));
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								```
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								`checkPositive([-1, -2, -3, -4, -5])` 应返回 `false`。
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								```js
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								assert(!checkPositive([-1, -2, -3, -4, -5]));
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								```
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								# --seed--
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								## --seed-contents--
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								```js
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								function checkPositive(arr) {
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								  // Only change code below this line
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								  // Only change code above this line
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								}
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								checkPositive([1, 2, 3, -4, 5]);
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								```
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								# --solutions--
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								```js
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								function checkPositive(arr) {
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								  // Only change code below this line
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								  return arr.some(elem => elem > 0);
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								  // Only change code above this line
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								}
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								checkPositive([1, 2, 3, -4, 5]);
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								```
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