[turboid] javascript solutions

New math and time functions for JavaScript

Including an easy-to-use stop watch

The standard math and time functions of JavaScript are widely sufficient. Anyhow, Turboid provides useful math and time functions which make a developers life little easier. In this article you find a bunch of such functions and its descriptions.

For example, one misses in standard JavaScript handy solutions for a number of requisites which occur quite often, like easily generating an random number greater than 1 and at the same time not greater then a certain maximum; or counting the digits of a number; or extracting a number of a string like "50px"...

So here you have a list of Turboid arithmetic and time-related functions:

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randomTo(max)

Returns a random number which is greater than or equal to zero and at the same time smaller than or equal to max.

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getDigits(numVal)

Returns an array of the digits of numVal.

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countDigits(numVal)

Returns the number of digits in numVal.

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round(value [, numOfDigits])

Rounds a number value like Math.round(), but allows delimiting the number of positions after the decimal point (numOfDigits, optional).

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numIn(str)

A very important function for extracting numbers in strings containing letters and other characters. Example: numIn("width:50px") returns 50 (as a number, not a string).

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makeEven(num)

Makes an odd number even by reducing it to the next lower even integer number if necessary. Alternative notation: _(num).makeEven()

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isOdd(n)

Returns whether number n is odd or not. Alternative notation: _(num).isOdd()

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isInt(n)

Returns whether number n is an integer number or not. Alternative notation: _(num).isInt()

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forceDigits(val, num)

Forces a number to have a certain amount of digits by putting additional zeros at the beginning. Returns a string. For example, forceDigits(568, 5) returns "00568".

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ignoreLeadingZeros(numAsStr)

Converts for example "00568" to 568. Returns a number, not a string. This is an alternative to numIn() and standard JavaScript parseInt, which unfortunately both return 0 in such cases.

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new Clock()

Generates a stop watch. Provides two object functions, .start(), which starts the timer, and .stop(), which returns the measured time. Usage example:

var watch = new Clock();
watch.start();

alert("Do you want to see how long you have waited?");

alert("You have waited "+watch.stop()+" milliseconds");