JavaScript helper: TryParseInt [TypeScript]

Here’s a quick JavaScript helper snippet to test a string and return a parsed integer value, or a default value if the the parse fails.

Written in TypeScript.

 

/**
 * Try to parase an integer value from a string. Returns the number if successful, otherwise return a default value.
 * @param value The string with an integer to parase.
 * @param defaultValue Default value to return if parsing fails.
 */
public static TryParseInt(value: string, defaultValue: number = 0): number {
	let parsedValue = parseInt(value, 10);

	if (isNaN(parsedValue)) {
		// Failed to parse. Return the default value.
		return defaultValue;
	} else {
		// Return the parsed value.
		return parsedValue;
	}
}

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