pip-services3-commons-node
Version:
Portable abstractions and patterns for Pip.Services in Node.js
68 lines • 2.55 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
/** @module convert */
/** @hidden */
var _ = require('lodash');
/**
* Converts arbitrary values into double using extended conversion rules:
* - Strings are converted to double values
* - DateTime: total number of milliseconds since unix epoсh
* - Boolean: 1 for true and 0 for false
*
* ### Example ###
*
* let value1 = DoubleConverter.toNullableDouble("ABC"); // Result: null
* let value2 = DoubleConverter.toNullableDouble("123.456"); // Result: 123.456
* let value3 = DoubleConverter.toNullableDouble(true); // Result: 1
* let value4 = DoubleConverter.toNullableDouble(new Date()); // Result: current milliseconds
*/
var DoubleConverter = /** @class */ (function () {
function DoubleConverter() {
}
/**
* Converts value into doubles or returns null when conversion is not possible.
*
* @param value the value to convert.
* @returns double value or null when conversion is not supported.
*/
DoubleConverter.toNullableDouble = function (value) {
if (value == null)
return null;
if (_.isNumber(value))
return value;
if (_.isDate(value))
return value.getTime();
if (_.isBoolean(value))
return value ? 1 : 0;
var result = parseFloat(value);
return isNaN(result) ? null : result;
};
/**
* Converts value into doubles or returns 0 when conversion is not possible.
*
* @param value the value to convert.
* @returns double value or 0 when conversion is not supported.
*
* @see [[toDoubleWithDefault]]
*/
DoubleConverter.toDouble = function (value) {
return DoubleConverter.toDoubleWithDefault(value, 0);
};
/**
* Converts value into integer or returns default value when conversion is not possible.
*
* @param value the value to convert.
* @param defaultValue the default value.
* @returns double value or default when conversion is not supported.
*
* @see [[toNullableDouble]]
*/
DoubleConverter.toDoubleWithDefault = function (value, defaultValue) {
if (defaultValue === void 0) { defaultValue = 0; }
var result = DoubleConverter.toNullableDouble(value);
return result != null ? result : defaultValue;
};
return DoubleConverter;
}());
exports.DoubleConverter = DoubleConverter;
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