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Showing posts from January, 2016

Accessing other HTTP servers on Cloud 9 IDE

If you're using Cloud 9 to do development, you'll quickly realize that only ports 8080 through 8082 are available to the outside world from your development box. This is generally not an issue as you can set your application to bind to the $PORT environment variable when in development mode. However, there are sometimes other servers that we want to make use of that host on different default ports.

I recently had to setup a Neo4j server which defaults the admin interface of port 7474. Unfortunately, I could not access the admin interface even through the IDE based web browser window. So, what to do? I could change the default server settings so that it runs on a different port. However, the app I'm working on with a team has 7474 hard-coded and I currently don't feel like writing a local only work-around.

After some searching, I ran across a neat Linux tool called socat. This allows us to easily forward one port to another. After a quick install via apt-get, I ran the …

The Limits of ES6 Destructured Assignment

This is a cross post from my employer blog and I didn't bother to convert the markdown over to something that would work in Blogger. Official link is here.

In working with a React component today, I wanted to copy some, but not all, properties from props to state. My immediate thought was that there is certainly a way to do this with ES6 destructuring assignment. After failing to find any relevant examples online, I eventually found my way to [this SO answer][so] which concludes that it can’t be done with the current spec.
Still wanting something a bit less redundant than stating the object names for every assignment, I eventually thought up a partial “solution”. Use destructured assignment to initialize the required properties as local variables. Then again to set the properties of an object literal.
``` let props = {x:1, y:1, z:2, j:4}; let state;
{  const {x, y, z} = props;  state = {x, y, z};  console.log(x); }
console.log(state); console.log(x); ```
Results:
``` 1 {"x":1,"y…