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Lodash _.toSafeInteger


The _.toSafeInteger method is a function provided by the popular JavaScript utility library, Lodash. This method converts the given value to a safe integer. It returns a whole number which is guaranteed to be within the safe integer range (i.e., between -2^53 + 1 and 2^53 - 1).

This method accepts a single argument, which can be any value such as a number, a string, or an object. If the input value is a string, it first attempts to convert it into a number before evaluating it.

If the input value can be safely converted to an integer, the method returns the converted integer. If the input value is outside the safe integer range, it returns either the maximum safe integer (2^53 - 1) or the minimum safe integer (-2^53 + 1), depending on the sign of the input.

Here is an example usage of the _.toSafeInteger method:

_.toSafeInteger('3.14'); // Output: 3
_.toSafeInteger(Number.MIN_VALUE); // Output: 0
_.toSafeInteger(Infinity); // Output: 9007199254740991
_.toSafeInteger('1.7976931348623157e+308'); // Output: 9007199254740991

In the first example above, the string '3.14' is converted to the integer 3. The second example shows the output when the input value is smaller than the minimum safe integer. The third example shows the output when the input value is larger than the maximum safe integer. And the fourth example shows the maximum safe integer being returned when the input value is a string representation of the largest possible number.

Overall, the _.toSafeInteger method can be a useful tool when handling user input or converting values that may be too large or too small to safely represent as a normal JavaScript integer.