a2zzz

Generate strings from a to zzz and beyond

A simple utiliy for creating sequential labels i.e. a,b,c,...,x,y,z

example usage

Create a table with spreadsheet headers

import a2z from 'node_modules/a2zzz';

const table = document.createElement('table');
const header = table.createTHead();
const body = table.createTBody();
const headerRow = header.insertRow();

const headings = a2z.simple();

headerRow.insertCell()

for (let i = 0; i < 30; i += 1) {
    const headerCell = headerRow.insertCell();

    headerCell.innerText = headings.next().value.toUpperCase();
}

for (let i = 0; i < 2; i += 1) {
    let bodyRow = body.insertRow();

    for (let ii = 0; ii < 31; ii += 1) {
        const bodyCell = bodyRow.insertCell();
        bodyCell.innerText = ii === 0 ? i + 1 : '-';
    }
}

document.body.appendChild(table);

results in

	A	B	C	...	Y	Z	AA	AB	AC	AD
1	-	-	-	--	-	-	-	-	-	-
2	-	-	-	--	-	-	-	-	-	-

API

A default class with static methods is provided, these are simplified aliases of the core function a2zzz which is the generator.

Simple approach

At it's simplest the generator will start at 'a' and continue until stopped.

import a2z from 'node_modules/a2zzz';

const generator = a2z.simple();

// print 'a',...
for(let label of generator) {
    console.log(label);
}

Limit the number of labels created

If the number of labels required is known then the limit function can be utilised

import a2z from 'node_modules/a2zzz';

const generator = a2z.limit(7);

// print 'a',...,'g'
for(let label of generator) {
    console.log(label);
}

Specify the starting label (optional limit)

import a2z from 'node_modules/a2zzz';

const generator = a2z.standard('x', 4); // optional limit

// print 'x', 'y', 'z', 'aa'
for(let label of generator) {
    console.log(label);
}