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ArrayTrait.php
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74 lines (67 loc) · 1.74 KB
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<?php
/**
* Copyright 2016 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
namespace Google\Cloud;
/**
* Provides basic array helper methods.
*/
trait ArrayTrait
{
/**
* Pluck a value out of an array.
*
* @param string $key
* @param array $arr
* @return string
* @throws \InvalidArgumentException
*/
private function pluck($key, array &$arr)
{
if (!isset($arr[$key])) {
throw new \InvalidArgumentException(
"Key $key does not exist in the provided array."
);
}
$value = $arr[$key];
unset($arr[$key]);
return $value;
}
/**
* Pluck a subset of an array.
*
* @param string $keys
* @param array $arr
* @return string
*/
private function pluckArray(array $keys, &$arr)
{
$values = [];
foreach ($keys as $key) {
$values[$key] = $this->pluck($key, $arr);
}
return $values;
}
/**
* Determine whether given array is associative.
*
* @param array $arr
* @return bool
*/
private function isAssoc(array $arr)
{
return array_keys($arr) !== range(0, count($arr) - 1);
}
}