General Ramblings comments edit

I have a bunch of random thoughts I sorta need to get down and they’re bigger than tweets but none really is big enough for a standalone blog entry. Most are non-technical, so… tune out if you like. At least for this one.

Had a great time playing Beatles Rock Band with my friend Jeff and my parents over Xbox Live on Saturday. Mom’s figured out how to get on Xbox Live all by herself which is super cool, and my dad came on later. Got 100% on Expert-level drums on “Do You Want To Know A Secret” and “While My Guitar Gently Weeps,” which, while probably not the most-awesome-drumming-feat-ever, made me feel pretty good. (I got 100% on Hard-level drums on Rock Band 2 for “Livin’ on a Prayer” earlier in the week, which also made me pretty happy.)

Speaking of drums, I’ve been having some troubles with my Ion Drum Rocker kit lately and it’s been a pain to troubleshoot. For a while I was getting disconnected at random intervals from the console and the green pad would hit at random times without me touching it. Kind of kills your streak (and your mood). I switched my setup so I wasn’t running the drums through a USB hub and the random disconnects disappeared, but the random hits didn’t. Instead, it switched to be random hits from the kick pedal instead. (Actually, either the kick would stop responding entirely or it would hit like a machine gun without you touching it. Either way, still kills your streak.) I’ve been talking to both Ion support and Rock Pedal support and have been doing all sorts of troubleshooting shenanigans - rearranging cables, trying different USB ports on the Xbox, and even switching the sensor on my pedal for a new one. You can’t reproduce it on demand, though, so I have to play a ton to see if any of these things have fixed it. I haven’t seen any trouble since I swapped out the pedal sensor (after which I got all those good scores, noted above) so maybe that fixed it.

Now that I’ve typed that out, I’ve jinxed it, but still.

I picked up a Rubik’s Cube this weekend with this $5 Target gift card that was burning a hole in my pocket. I got the guts up this morning to mix it up. We’ll see how long it takes me to figure it out. Haven’t ever solved a Rubik’s Cube before so we’ll see.

One of my favorite things in the world: when you put a bag of tea in your cup and the little string pulls off. That’s happened to me twice in two days. Maybe I just don’t realize my own strength or something, but I’m thinking maybe they need to figure out a better way to attach those strings than staples.

I was talking to my sister yesterday about various podcasts that we listen to and it got me thinking about how iTunes podcast management blows. I always - always - have to manually delete podcasts I’ve listened to even though I have my settings such that it should auto-delete podcasts I’ve listened to. Not sure how a play count > 0 doesn’t constitute “listened to,” but it apparently doesn’t.

While I’m on iTunes, where’s the multi-user support on that thing? Multiple users, one computer, one library. Is that really so uncommon? As it stands, you still have to do a bunch of manual manipulation to get that working.

Other stuff that’s been bugging me…

Incorrect grammar and/or spelling. I don’t claim to be perfect on this stuff, but there are some that just get me. Lately:

  • The phrase is “hear, hear!” when you agree with someone, not “here, here.”
  • When you get provoked into doing something, you’re “goaded” into it, not “goated.” A goat is an animal. A goad is a stick used to prod an animal.
  • You can ask me a question or you can make a request, but you don’t have “an ask” for me. “Ask” is a verb.
  • The spelling for an informal affirmative that you’re thinking of is “yeah” (pronounced “‘yaə”).
    • “ya” is either an abbreviation for “young adult” or is an informal version of “you” (“What do ya think?”) and would be prounced like “‘yə”.
    • “yah” rhymes with “saw” and is the sound you make when you want to make your horse go. “YAH! YAH!” <cracking whip>
    • “yea” is pronounced “‘yā” and is used in formal voting (rhymes with, and is the opposite of, “nay”).

People asking for an opinion they don’t want. Sort of like if someone asks, “Do you think I should buy this shirt?” and you say “no” and they buy it anyway. If you already have your mind made up to buy the damn shirt, why’d you bother asking for my opinion?

OK. I’m done for now.

javascript, gists comments edit

I was messing around with relative paths to files (e.g., ../images/error.gif) and needed to convert them to absolute paths (e.g., http://server/images/error.gif) on the client but couldn’t figure out how. Then I saw this nifty trick to HTML encode things using jQuery and it gave me an idea.

String.toAbsolutePath = function(relativePath) {
  /// <summary>
  /// Converts a relative file path into an absolute file path.
  /// </summary>
  /// <param name="relativePath" type="String">
  /// The string with the relative path, like "../foo/bar.gif"
  /// </param>
  /// <returns type="String" />
  var path = $("<div style=\"background-image:url('" + relativePath + "');\"></div>").css("background-image");
  if (path.startsWith("url(")) {
    path = path.substring(4);
  }
  if (path.endsWith(")")) {
    path = path.substring(0, path.length - 1);
  }
  if (path.startsWith("\"")) {
    path = path.substring(1, path.length);
  }
  if (path.endsWith("\"")) {
    path = path.substring(0, path.length - 1);
  }
  return path;
}

Basically, I’m using the CSS style “background-image” and feeding in the relative path, then resolving it immediately. Turns out the browser converts that to an absolute path for you. At least, Firefox 3.5.3 and IE 7 do, which is what I was testing with at the time.

The path.startsWith and path.endsWith checks are because sometimes the URL comes back like:

url("http://server/images/error.gif")

…with the url(“”) wrapper, and sometimes it comes back like:

http://server/images/error.gif

…without the wrapper at all.

Note the String.startsWith and String.endsWith methods come from ASP.NET AJAX so if you wanted to do it in just jQuery, you’d have to regex your way out of it or do a little more brute force work.

Of course, in the end, I figured out a different way to do what I was doing so I didn’t actually need to convert the path at all, but I thought this was sort of neat so I’d post it for folks. I didn’t really test it in a bunch of browsers or anything, so YMMV. “Works on My Machine.”

aspnet, javascript, gists comments edit

I had to parse a culture-sensitive currency value from a string and couldn’t figure out how to do it. I’m using ASP.NET AJAX to do String.localeFormat("{0:c}", value) for writing a currency value to a textbox, but getting it back out… not so easy. The Number.parseLocale extension provided with ASP.NET AJAX is cool for parsing out numbers in a culture-sensitive fashion… if they don’t have a currency symbol.

So, time to hook that up. Here’s what I came out with:

Number.parseCurrency = function Number$parseCurrency(str) {
  /// <summary>
  /// Parses a string containing a culture-sensitive currency value into a number.
  /// </summary>
  /// <param name="str" type="String">
  /// The numeric string with optional currency symbol to convert into a number.
  /// </param>
  /// <returns type="Number" />
  var currencySymbol = Sys.CultureInfo.CurrentCulture.numberFormat.CurrencySymbol;
  var numberOnly = str.replace(/\s+/g, '').replace(eval("/\\" + currencySymbol + "/g"), '');
  var parsed = Number.parseLocale(numberOnly);
  if (isNaN(parsed)) {
    // Try all 5 possible negative number formats.
    var customCi = Sys.CultureInfo.InvariantCulture;
    for (var i = 0; i < 5; i++) {
      customCi.numberFormat.NumberNegativePattern = i;
      parsed = Number._parse(numberOnly, customCi);
      if (!isNaN(parsed)) {
        break;
      }
    }
  }
  return parsed;
}

What it’s doing:

  1. Get the currency symbol for the current culture.
  2. Take the currency-formatted string and remove all whitespace and that currency symbol. Now you have a number that is either positive or ostensibly adheres to one of the known negative number formats.
  3. Parse that string in a culture-sensitive fashion into a number. Usually this will work straight-off. Unfortunately, the negative currency format can sometimes differ from the negative number format. For example, a negative number might be -1.23, but a negative currency format might be like ($1.23). So if the parsing comes back as not-a-number, chances are that’s what you’re hitting.
  4. If the parsed value comes back as not-a-number, we know there are five pre-defined negative number formats that are possible in ASP.NET AJAX: ["(n)","-n","- n","n-","n -"] For each of those possible formats…
    1. Create a temporary culture, based on the Invariant culture, that uses the selected negative number pattern. (When you ask for the Invariant culture it actually creates a brand new instance every time, so doing this won’t change the built-in Invariant culture.)
    2. Try to manually parse the number given your custom culture.
    3. If it succeeded, return that value.

At the end of all that if you still come out with NaN, it’s not a currency value.

If someone knows a better way to do this, I’m all ears.

If you want it, go for it. YMMV, no warranty expressed nor implied. If you find a defect, post to the comments and I’ll update.

downloads, vs, coderush comments edit

This is sort of a niche thing, so if you don’t know what I’m talking about, don’t worry. However, people who write DXCore plugins (CodeRush/Refactor) sometimes need to do some action based on what context the user is currently in. For example, you may need to enable a function or hide a button or something if the user is in a designer screen. The problem is, it’s hard to debug that sort of thing - there’s nothing that says “here’s the context(s) you’re currently in” so when you’re writing your plugin you can do the right thing.

That’s what I made - a plugin that [optionally] polls for the list of contexts the user is currently in so you can debug the plugin you’re writing.

DX_ContextLab
Window

If you want it (or any of the other awesome FREE community plugins), head over to the DXCore Community Plugins site.

aspnet, javascript, gists comments edit

I’m working on a site where we’re using both ASP.NET AJAX and jQuery to get things done. This includes jQuery Validation for client-side validation functionality.

One of the things that comes with jQuery Validation is a $.validator.format method that replaces the {n} style parameters in a string with arguments - basically, a very lightweight String.format.

ASP.NET AJAX provides a really nice implementation of String.format that is pretty full-featured and understands format strings. For example, you can do String.format("{0:d}", mydate) to format a date in short date format. Snazzy stuff. Unfortunately, the jQuery Validation one isn't that robust... so I figured I'd marry the two worlds. Allow you to still use the $.validator.format` method, just like you always do, but under the covers it’ll pass through to ASP.NET AJAX to do the replacement/formatting.

Make sure you’ve got the ASP.NET AJAX, jQuery, and jQuery Validation script libraries registered in your page, then do this:

(function($) {
  if ($.validator) {
    $.validator.format = function(source, params) {
      if (arguments.length == 1)
        return function() {
          var args = $.makeArray(arguments);
          args.unshift(source);
          return $.validator.format.apply(this, args);
        };
      if (arguments.length > 2 && params.constructor != Array) {
        params = $.makeArray(arguments).slice(1);
      }
      if (params.constructor != Array) {
        params = [params];
      }
      var toEval = "String.localeFormat(source, __);";
      var paramEval = new Array();
      for (var i = 0; i < params.length; i++) {
        Array.add(paramEval, "params[" + i + "]");
      }
      toEval = toEval.replace(/__/, paramEval.join(","));
      return eval(toEval);
    };
  }
})(jQuery);

Basically we keep the currying bit that comes out of the box with $.validator.format but replace the bit that does the replacement work with the ASP.NET AJAX String.format. That should replace the existing $.validator.format method with a syntactically-and-functionally-equivalent, but slightly more robust, implementation.

UPDATE 9/30/09: The original version didn’t work if there was more than one parameter value you were validating against, like in a range where there’s a min and a max value. The new version takes that into account. The crazy eval junk at the end is because you can’t do String.localeFormat("...", Array) - the string formatting in ASP.NET AJAX doesn’t like it if you pass an array rather than an explicit list of arguments. The eval thing dynamically builds a valid statement like String.localeFormat(source, params[0], params[1]..., params[n]) and evaluates that so it works.