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| 1 | /**
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| 2 | * @license
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| 3 | * Copyright Google LLC All Rights Reserved.
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| 4 | *
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| 5 | * Use of this source code is governed by an MIT-style license that can be
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| 6 | * found in the LICENSE file at https://angular.io/license
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| 7 | */
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| 8 | /**
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| 9 | * Coerces a value to an array of trimmed non-empty strings.
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| 10 | * Any input that is not an array, `null` or `undefined` will be turned into a string
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| 11 | * via `toString()` and subsequently split with the given separator.
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| 12 | * `null` and `undefined` will result in an empty array.
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| 13 | * This results in the following outcomes:
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| 14 | * - `null` -> `[]`
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| 15 | * - `[null]` -> `["null"]`
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| 16 | * - `["a", "b ", " "]` -> `["a", "b"]`
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| 17 | * - `[1, [2, 3]]` -> `["1", "2,3"]`
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| 18 | * - `[{ a: 0 }]` -> `["[object Object]"]`
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| 19 | * - `{ a: 0 }` -> `["[object", "Object]"]`
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| 20 | *
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| 21 | * Useful for defining CSS classes or table columns.
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| 22 | * @param value the value to coerce into an array of strings
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| 23 | * @param separator split-separator if value isn't an array
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| 24 | */
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| 25 | export declare function coerceStringArray(value: any, separator?: string | RegExp): string[];
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