Generate a range between two numbers or letters. Examples: 1-100, a-z, A-Z, a-zz or even A-ZZZZZ.
Install: npm install rangegen
This project is Unlicensed. In other words, I don't care what you do with it. However, if you make something interesting, I would like to check it out.
Generate a range between two numbers or letters. Examples: 1-100, a-z, A-Z, a-zz or even A-ZZZZZ.
*WARNING* Running range on a big letter gap causes MANY loops!
For instance, a-zzzzz creates an array with 12,356,630
indexes and does 73,645,526 while and for loops!
-- Array generator (See "examples.js" for usage) --
var array = RangeGen(<from>,<to>,[<step>[,<exceptions>]]);
From - The letter or number to start the range at. (numbers/letters)
To - The letter or number to end on/near. (numbers/letters)
Step* - The amount to increment or decrement by. Default, 1. (true/false, number)
exceptions* - Throw error messages. Default, return an empty array. (true/false);
* Optional.
-- Iterators (See "examples2.js" for usage) --
var iterator = RangeGen.iterator(<from>,<to>[,<step>[,<exceptions>]]);
RangeGen.iter(<from>,<to>[,<step>[,<exceptions>]])
hasNext() - Returns true if the iteration has more elements.
next() - Returns the next element in the iteration, or false if `exceptions` is not set.
Otherwise throws a `NoSuchElement` exception.
length - The total number of iterations.
var RangeGen = require('rangegen');
try {
var a = RangeGen("a","z");
console.log("[a-z] "+a.join(",")+"\n");
var b = RangeGen("z","a");
console.log("[z-a] "+b.join(",")+"\n");
var c = RangeGen("A","ZZ",10);
console.log("[A-ZZ,10] "+c.join(",")+"\n");
var d = RangeGen("ZZ","A",10);
console.log("[ZZ-A,10] "+d.join(",")+"\n");
var e = RangeGen(0,100,10);
console.log("[0-100,10] "+e.join(",")+"\n");
var f = RangeGen(100,0,10);
console.log("[100-0,10] "+f.join(",")+"\n");
} catch (e) {
console.log(e);
};
console.log("\n--- Throw errors! ---");
try {
RangeGen("a",100,1,true);
} catch (e) {
console.log("[a-100] "+e+"\n");
};
try {
RangeGen(100,"z",1,true);
} catch (e) {
console.log("[100-a] "+e+"\n");
};
try {
console.log(RangeGen("@","!",1,true));
} catch (e) {
console.log("[@-!] "+e+"\n");
};
try {
console.log(RangeGen("a","!",1,true));
} catch (e) {
console.log("[a-!] "+e+"\n");
};
console.log("\n--- Return empty arrays! ---");
console.log(RangeGen("a","100"));
console.log(RangeGen("100","z"));
console.log(RangeGen("@","!"));
console.log(RangeGen("a","!"));
var RangeGen = require('rangegen');
try {
var iterator = RangeGen.iter(-30,30,1,true);
console.log("Iterations: "+iterator.length);
var range = [];
while (iterator.hasNext()) {
range.push(iterator.next());
};
console.log(range.join(','));
} catch (e) {
console.log(e);
};
console.log("\n--- Throw errors! ---");
try {
console.log("- Invalid next() call. -");
var iterator = RangeGen.iterator(-30,30,1,true);
console.log("Iterations: "+iterator.length);
var range = [];
while (iterator.hasNext()) {
range.push(iterator.next());
};
iterator.next();
} catch (e) {
console.log(e);
};
try {
console.log("\n- Inalid range. [a-30] -");
var iterator = RangeGen.iterator("a",30,1,true);
} catch (e) {
console.log(e);
};
console.log("\n--- Return false! ---");
try {
var iterator = RangeGen.iterator("a",30,1);
if (!iterator) {
console.log("`iterator` is false!");
}
} catch (e) {
console.log(e);
};
<html>
<head>
<title>RangeGen test</title>
<script src="./rangegen.js"></script>
<script>
try {
var a = RangeGen("a","z");
alert("[a-z] "+a.join(",")+"\n");
var b = RangeGen("z","a");
alert("[z-a] "+b.join(",")+"\n");
var c = RangeGen("A","ZZ",10);
alert("[A-ZZ,10] "+c.join(",")+"\n");
var d = RangeGen("ZZ","A",10);
alert("[ZZ-A,10] "+d.join(",")+"\n");
var e = RangeGen(0,100,10);
alert("[0-100,10] "+e.join(",")+"\n");
var f = RangeGen(100,0,10);
alert("[100-0,10] "+f.join(",")+"\n");
} catch (e) {
alert(e);
};
window.onload = function () {
try {
var iterator = RangeGen.iter(-30,30,5,true);
alert("Iterations: "+iterator.length);
var range = [];
while (iterator.hasNext()) {
range.push(iterator.next());
};
document.getElementById('iter').innerHTML = range.join(',');
} catch (e) {
document.getElementById('iter').innerHTML = e;
};
};
</script>
</head>
<body>
<div id="iter">
</div>
</body>
</html>
FAQs
Generate a range between two numbers or letters. Examples: 1-100, a-z, A-Z, a-zz or even A-ZZZZZ.
We found that rangegen demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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