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After days of struggling with iOS and Calendar app, I finished this project. Now you’re able to use Calendar with Jalali dates as well as Gregorian! Fully compatible with iPhone/iPod and iPad.

Features:

• Use Calendar app with Jalali dates. Perfectly compatible, Easy to switch back to Gregorian at any moment.
• Customize the way Calendar icon looks with 6 predefined methods
• Customize the date appearing on lockscreen with Jalali or Gregorian date (or both!)
• Can import 1390 calendar events
• Adds Persian language localization support for Calendar

Using this application, not only you’d get a nice Shamsi calendar system in Calendar application, but also you can customize the way Calendar Icon looks, and date appearance on your locksreen with cool Shamsi features It’s fully customizable.

I hope to release it in next two weeks

Giving the time required for testing purposes, I think it will be out in two weeks

Persian Calendar 0.9b, running on iPad

Once again I dedicated my time on calendar integration and I’m surely one step closer to what I wanted in the first place. I hope to release this patch by end of summer.

A better calendar running on iOS for Persians

During this semester we had to implement a Java Search Engine based on vector models for Information-Retrieval class. We had to parse given document and then let the user search through it! There was a part of this project where I had to compute inner product of two vectors. Each document is translated into a vector and document similarity is defined by inner product of their vectors. During clustering which I used K-Means algorithm, nearly 90% of process was used in product computation. I was so desperate to minimize time needed for that process that I came up with a funny optimization which cut processing time in HALF!

Since dimension of these vectors is really high (560000) I saved them on two different arrays. First array saves index and the second array saves value of a given vector. So the product computation is simple! it will be sum of products of values with the same index. I would normally write such program like this:

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	float value = 0;
	int indexB = 0;
	for (int i = 0; i < A.key.length;) {
	  if (A.key[i] == B.key[indexB]) {
		value += A.value[i] * B.value[indexB];
		i++;
		indexB++;
		if (indexB >= B.key.length) {
		  break;
		}
	  } else {
		if (A.key[i] < B.key[indexB]) {
		  i++;
		} else {
		  indexB++;
		  if (indexB >= B.key.length) {
			break;
		  }
		}
	  }
	}
	return value;

What I realized was, that I don’t actually need to check index bounds, since Java is already doing it and is ready to throw an IndexOutOfBoundsException! So I changed my code to this, and it became amazingly fast!

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	float value = 0;
	int indexB = 0;
	int indexA = 0;
	try {
	  while (true) {
		if (A.key[indexA] == B.key[indexB]) {
		  value += A.value[indexA] * B.value[indexB];
		  indexA++;
		  indexB++;
		} else {
		  while (A.key[indexA] < B.key[indexB]) {
			indexA++;
		  }
		  while (A.key[indexA] > B.key[indexB]) {
			indexB++;
		  }
		}
	  }
	} catch (IndexOutOfBoundsException e) {
	}
	return value;

Using this package you’re able to use the fabulous black keyboard anywhere!

By i-Phone.ir, Persian Development Team

P.S: This package will be released on ModMyi’s repository!

Once again it’s universal to support iPhone,iPad,iPod.

Latest stable release: 4.3.7 Supporting 4.2, 4.2.1, 4.3, 4.3.1

That’s all for now

Stay tuned for more information