Created
October 16, 2012 18:56
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| // From the 140bytes wishlist here: https://github.com/jed/140bytes/wiki/Wishlist | |
| // TASK: | |
| // Create a function which can create a DOM structure from this: | |
| // | |
| domBuilder( | |
| [/HTML/], | |
| [/HEAD/], | |
| [/TITLE/], | |
| "Wouldn't this be cool?", | |
| [], | |
| [], | |
| [/BODY/], | |
| [/DIV/, {id: "container"}], | |
| "Hello, world", | |
| [], | |
| [], | |
| [] | |
| ); | |
| // => | |
| // <html> | |
| // <head><title>Wouldn't this be cool?</title></head> | |
| // <body><div id="container">Hello, world</div></body> | |
| // </html> | |
| ///////////////////// | |
| // My implementation: | |
| ///////////////////// | |
| function domBuilder(a, b, c, d, i, m) { | |
| a = [].slice.call(arguments); | |
| for (d = i = 0,m=document; b = a[i++];) | |
| if (b.sort) // an array? | |
| for ( | |
| c in | |
| // NOTE: this is not a notable part of the for..in -- it is placed here for space-saving | |
| // Here we create a new child or traverse upwards if b[0] isn't defined: | |
| d = b[0] ? (c = m.createElement(b[0].source),d ? d.appendChild(c) : c) : d.parentNode || d, | |
| b[1] | |
| ) // apply attribute: | |
| d[c]=b[1][c]; | |
| else // a string? -- add text: | |
| d.appendChild(m.createTextNode(b)); | |
| return d; | |
| } | |
| /////////////////////// | |
| // Minified (254 bytes) | |
| /////////////////////// | |
| function domBuilder(e,b,c,a,f,d){e=[].slice.call(arguments);a=f=0;for(d=document;b=e[f++];)if(b.sort)for(c in a=b[0]?(c=d.createElement(b[0].source),a?a.appendChild(c):c):a.parentNode||a,b[1])a[c]=b[1][c];else a.appendChild(d.createTextNode(b));return a} |
(Can anyone make it smaller without sacrificing the specified functionality?)
Not sure if using this would help save space / even work, but: !b.sort && d.appendChild(m.createTextNode(b)) || for (c in
Got it down to 232 bytes.
Could save another 7 bytes by using simple strings instead of regexp literals to specify tag names.
@jcutrell, unfortunately statements can't go in expressions, i.e the for (i in...) loop
@tobeytailor, ahh nice work! I was so set in my ways with [].slice.call(args) that I forgot that it is just an array-like thing.
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The spec could be improved to make the implementation smaller. E.g. An array could be passed to
domBuilderinstead of relying onarguments. And we could useinnerHTMLinstead of creating a text-node, but that'd probably break things unexpectedly.Can anyone make it smaller than 254 bytes?