diff --git a/kabelsalat/graph-language.html b/kabelsalat/graph-language.html
new file mode 100644
index 0000000..76ae03a
--- /dev/null
+++ b/kabelsalat/graph-language.html
@@ -0,0 +1,292 @@
+
+
+
+ 🌱 a graph language
+
+
+
+ 🌱 a graph language
+ I've found this way of building graphs really compelling:
+
+class Node {
+ constructor(type, ins) {
+ this.type = type;
+ this.ins = ins;
+ }
+}
+// registers a function on the node class + standalone
+let registerNode = (type) => {
+ Node.prototype[type] = function (...args) {
+ return new Node(type, [this, ...args]);
+ };
+ return (...args) => new Node(type, args);
+};
+const add = registerNode("add");
+const sub = registerNode("sub");
+const mul = registerNode("mul");
+const div = registerNode("div");
+
+add(3, 2).mul(3).div(2);
+// = div(mul(add(3, 2), 3), 2);
+
+
+ It's a thin abstraction over function calling, allowing you to use method
+ chaining to pass the left side to the next function, without paren
+ nesting. Hydra, strudel and kabelsalat use a variant of this syntax for
+ their DSL (domain specific language). The output looks like this:
+
+
+{
+ "type": "div",
+ "ins": [
+ {
+ "type": "mul",
+ "ins": [
+ {
+ "type": "add",
+ "ins": [3, 2],
+ "id": 0
+ },
+ 3
+ ],
+ "id": 1
+ },
+ 2
+ ],
+ "id": 2
+}
+
+
+ The above JSON is a syntax tree, describing the structure of function
+ calls. We can visualize this using graphhviz:
+
+
+ The tree becomes a graph when we reuse nodes as variables:
+
+let a = add(1, 2);
+return a.mul(3).add(a)
+
+
+ we can even form cycles, by routing a node to its own input:
+
+const node = add(1)
+node.ins.push(node)
+return node;
+
+
+ I'll get more into cycles and feedback in another post. Here's an editor
+ to play around with:
+
+
+
+
+ Now that we know how to create graphs, it's time to actually use them..
+
+
+ show page source
+
+ back to garten.salat
+
+
+
diff --git a/kabelsalat/graphviz.js b/kabelsalat/graphviz.js
new file mode 100644
index 0000000..151da36
--- /dev/null
+++ b/kabelsalat/graphviz.js
@@ -0,0 +1,4 @@
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c=n.nameTable[u];c;){var p=c.name_next;i.includes(c.mount)&&n.destroyNode(c),c=p}}),t.mounted=null;var a=t.mount.mounts.indexOf(o);t.mount.mounts.splice(a,1)},lookup(r,e){return r.node_ops.lookup(r,e)},mknod(r,e,t){var o=n.lookupPath(r,{parent:!0}),i=o.node,a=G.basename(r);if(!a||a==="."||a==="..")throw new n.ErrnoError(28);var u=n.mayCreate(i,a);if(u)throw new n.ErrnoError(u);if(!i.node_ops.mknod)throw new n.ErrnoError(63);return i.node_ops.mknod(i,a,e,t)},create(r,e){return e=e!==void 0?e:438,e&=4095,e|=32768,n.mknod(r,e,0)},mkdir(r,e){return e=e!==void 0?e:511,e&=1023,e|=16384,n.mknod(r,e,0)},mkdirTree(r,e){for(var t=r.split("/"),o="",i=0;i"u"&&(t=e,e=438),e|=8192,n.mknod(r,e,t)},symlink(r,e){if(!hr.resolve(r))throw new n.ErrnoError(44);var t=n.lookupPath(e,{parent:!0}),o=t.node;if(!o)throw new n.ErrnoError(44);var i=G.basename(e),a=n.mayCreate(o,i);if(a)throw new n.ErrnoError(a);if(!o.node_ops.symlink)throw new n.ErrnoError(63);return o.node_ops.symlink(o,i,r)},rename(r,e){var t=G.dirname(r),o=G.dirname(e),i=G.basename(r),a=G.basename(e),u,c,p;if(u=n.lookupPath(r,{parent:!0}),c=u.node,u=n.lookupPath(e,{parent:!0}),p=u.node,!c||!p)throw new n.ErrnoError(44);if(c.mount!==p.mount)throw new n.ErrnoError(75);var B=n.lookupNode(c,i),O=hr.relative(r,o);if(O.charAt(0)!==".")throw new n.ErrnoError(28);if(O=hr.relative(e,t),O.charAt(0)!==".")throw new n.ErrnoError(55);var k;try{k=n.lookupNode(p,a)}catch{}if(B!==k){var D=n.isDir(B.mode),b=n.mayDelete(c,i,D);if(b)throw new n.ErrnoError(b);if(b=k?n.mayDelete(p,a,D):n.mayCreate(p,a),b)throw new n.ErrnoError(b);if(!c.node_ops.rename)throw new n.ErrnoError(63);if(n.isMountpoint(B)||k&&n.isMountpoint(k))throw new n.ErrnoError(10);if(p!==c&&(b=n.nodePermissions(c,"w"),b))throw new n.ErrnoError(b);n.hashRemoveNode(B);try{c.node_ops.rename(B,p,a),B.parent=p}catch(x){throw x}finally{n.hashAddNode(B)}}},rmdir(r){var e=n.lookupPath(r,{parent:!0}),t=e.node,o=G.basename(r),i=n.lookupNode(t,o),a=n.mayDelete(t,o,!0);if(a)throw new n.ErrnoError(a);if(!t.node_ops.rmdir)throw new n.ErrnoError(63);if(n.isMountpoint(i))throw new n.ErrnoError(10);t.node_ops.rmdir(t,o),n.destroyNode(i)},readdir(r){var e=n.lookupPath(r,{follow:!0}),t=e.node;if(!t.node_ops.readdir)throw new n.ErrnoError(54);return t.node_ops.readdir(t)},unlink(r){var e=n.lookupPath(r,{parent:!0}),t=e.node;if(!t)throw new n.ErrnoError(44);var o=G.basename(r),i=n.lookupNode(t,o),a=n.mayDelete(t,o,!1);if(a)throw new n.ErrnoError(a);if(!t.node_ops.unlink)throw new n.ErrnoError(63);if(n.isMountpoint(i))throw new n.ErrnoError(10);t.node_ops.unlink(t,o),n.destroyNode(i)},readlink(r){var e=n.lookupPath(r),t=e.node;if(!t)throw new n.ErrnoError(44);if(!t.node_ops.readlink)throw new n.ErrnoError(28);return hr.resolve(n.getPath(t.parent),t.node_ops.readlink(t))},stat(r,e){var t=n.lookupPath(r,{follow:!e}),o=t.node;if(!o)throw new n.ErrnoError(44);if(!o.node_ops.getattr)throw new n.ErrnoError(63);return o.node_ops.getattr(o)},lstat(r){return n.stat(r,!0)},chmod(r,e,t){var o;if(typeof r=="string"){var i=n.lookupPath(r,{follow:!t});o=i.node}else o=r;if(!o.node_ops.setattr)throw new n.ErrnoError(63);o.node_ops.setattr(o,{mode:e&4095|o.mode&-4096,timestamp:Date.now()})},lchmod(r,e){n.chmod(r,e,!0)},fchmod(r,e){var t=n.getStreamChecked(r);n.chmod(t.node,e)},chown(r,e,t,o){var i;if(typeof r=="string"){var a=n.lookupPath(r,{follow:!o});i=a.node}else i=r;if(!i.node_ops.setattr)throw new n.ErrnoError(63);i.node_ops.setattr(i,{timestamp:Date.now()})},lchown(r,e,t){n.chown(r,e,t,!0)},fchown(r,e,t){var o=n.getStreamChecked(r);n.chown(o.node,e,t)},truncate(r,e){if(e<0)throw new n.ErrnoError(28);var t;if(typeof r=="string"){var o=n.lookupPath(r,{follow:!0});t=o.node}else t=r;if(!t.node_ops.setattr)throw new n.ErrnoError(63);if(n.isDir(t.mode))throw new n.ErrnoError(31);if(!n.isFile(t.mode))throw new n.ErrnoError(28);var i=n.nodePermissions(t,"w");if(i)throw new n.ErrnoError(i);t.node_ops.setattr(t,{size:e,timestamp:Date.now()})},ftruncate(r,e){var t=n.getStreamChecked(r);if(!(t.flags&2097155))throw new n.ErrnoError(28);n.truncate(t.node,e)},utime(r,e,t){var o=n.lookupPath(r,{follow:!0}),i=o.node;i.node_ops.setattr(i,{timestamp:Math.max(e,t)})},open(r,e,t){if(r==="")throw new n.ErrnoError(44);e=typeof e=="string"?yt(e):e,e&64?(t=typeof t>"u"?438:t,t=t&4095|32768):t=0;var o;if(typeof r=="object")o=r;else{r=G.normalize(r);try{var i=n.lookupPath(r,{follow:!(e&131072)});o=i.node}catch{}}var a=!1;if(e&64)if(o){if(e&128)throw new n.ErrnoError(20)}else o=n.mknod(r,t,0),a=!0;if(!o)throw new n.ErrnoError(44);if(n.isChrdev(o.mode)&&(e&=-513),e&65536&&!n.isDir(o.mode))throw new n.ErrnoError(54);if(!a){var u=n.mayOpen(o,e);if(u)throw new n.ErrnoError(u)}e&512&&!a&&n.truncate(o,0),e&=-131713;var c=n.createStream({node:o,path:n.getPath(o),flags:e,seekable:!0,position:0,stream_ops:o.stream_ops,ungotten:[],error:!1});return c.stream_ops.open&&c.stream_ops.open(c),s.logReadFiles&&!(e&1)&&(n.readFiles||(n.readFiles={}),r in n.readFiles||(n.readFiles[r]=1)),c},close(r){if(n.isClosed(r))throw new n.ErrnoError(8);r.getdents&&(r.getdents=null);try{r.stream_ops.close&&r.stream_ops.close(r)}catch(e){throw e}finally{n.closeStream(r.fd)}r.fd=null},isClosed(r){return r.fd===null},llseek(r,e,t){if(n.isClosed(r))throw new n.ErrnoError(8);if(!r.seekable||!r.stream_ops.llseek)throw new n.ErrnoError(70);if(t!=0&&t!=1&&t!=2)throw new n.ErrnoError(28);return r.position=r.stream_ops.llseek(r,e,t),r.ungotten=[],r.position},read(r,e,t,o,i){if(o<0||i<0)throw new n.ErrnoError(28);if(n.isClosed(r))throw new n.ErrnoError(8);if((r.flags&2097155)===1)throw new n.ErrnoError(8);if(n.isDir(r.node.mode))throw new n.ErrnoError(31);if(!r.stream_ops.read)throw new n.ErrnoError(28);var a=typeof i<"u";if(!a)i=r.position;else if(!r.seekable)throw new n.ErrnoError(70);var u=r.stream_ops.read(r,e,t,o,i);return a||(r.position+=u),u},write(r,e,t,o,i,a){if(o<0||i<0)throw new n.ErrnoError(28);if(n.isClosed(r))throw new n.ErrnoError(8);if(!(r.flags&2097155))throw new n.ErrnoError(8);if(n.isDir(r.node.mode))throw new n.ErrnoError(31);if(!r.stream_ops.write)throw new n.ErrnoError(28);r.seekable&&r.flags&1024&&n.llseek(r,0,2);var u=typeof i<"u";if(!u)i=r.position;else if(!r.seekable)throw new n.ErrnoError(70);var c=r.stream_ops.write(r,e,t,o,i,a);return u||(r.position+=c),c},allocate(r,e,t){if(n.isClosed(r))throw new n.ErrnoError(8);if(e<0||t<=0)throw new n.ErrnoError(28);if(!(r.flags&2097155))throw new n.ErrnoError(8);if(!n.isFile(r.node.mode)&&!n.isDir(r.node.mode))throw new n.ErrnoError(43);if(!r.stream_ops.allocate)throw new n.ErrnoError(138);r.stream_ops.allocate(r,e,t)},mmap(r,e,t,o,i){if(o&2&&!(i&2)&&(r.flags&2097155)!==2)throw new n.ErrnoError(2);if((r.flags&2097155)===1)throw new n.ErrnoError(2);if(!r.stream_ops.mmap)throw new n.ErrnoError(43);return 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