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38 lines
2.4 KiB
HTML
38 lines
2.4 KiB
HTML
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<p>You are given an array <code>items</code>, where each <code>items[i] = [type<sub>i</sub>, color<sub>i</sub>, name<sub>i</sub>]</code> describes the type, color, and name of the <code>i<sup>th</sup></code> item. You are also given a rule represented by two strings, <code>ruleKey</code> and <code>ruleValue</code>.</p>
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<p>The <code>i<sup>th</sup></code> item is said to match the rule if <strong>one</strong> of the following is true:</p>
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<ul>
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<li><code>ruleKey == "type"</code> and <code>ruleValue == type<sub>i</sub></code>.</li>
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<li><code>ruleKey == "color"</code> and <code>ruleValue == color<sub>i</sub></code>.</li>
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<li><code>ruleKey == "name"</code> and <code>ruleValue == name<sub>i</sub></code>.</li>
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</ul>
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<p>Return <em>the number of items that match the given rule</em>.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> items = [["phone","blue","pixel"],["computer","silver","lenovo"],["phone","gold","iphone"]], ruleKey = "color", ruleValue = "silver"
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<strong>Output:</strong> 1
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<strong>Explanation:</strong> There is only one item matching the given rule, which is ["computer","silver","lenovo"].
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</pre>
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<p><strong>Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> items = [["phone","blue","pixel"],["computer","silver","phone"],["phone","gold","iphone"]], ruleKey = "type", ruleValue = "phone"
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<strong>Output:</strong> 2
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<strong>Explanation:</strong> There are only two items matching the given rule, which are ["phone","blue","pixel"] and ["phone","gold","iphone"]. Note that the item ["computer","silver","phone"] does not match.</pre>
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<p> </p>
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<p><strong>Constraints:</strong></p>
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<ul>
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<li><code>1 <= items.length <= 10<sup>4</sup></code></li>
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<li><code>1 <= type<sub>i</sub>.length, color<sub>i</sub>.length, name<sub>i</sub>.length, ruleValue.length <= 10</code></li>
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<li><code>ruleKey</code> is equal to either <code>"type"</code>, <code>"color"</code>, or <code>"name"</code>.</li>
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<li>All strings consist only of lowercase letters.</li>
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</ul>
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