jellyfish
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最新评论
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....为什么楼主都英文的博客
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思路明确，代码清晰，通俗易懂
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代码比较干净
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yangguo 写道i don't think it is a ...
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i don't think it is a good way ...
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i just saw this post:
http://www.iteye.com/topic/1112383
titled as oo 还是 procedural 小程序的设计.
it's kind of interesting. first, i love bowling (though just average player), secondly, it's a good design question for interviews.
here is a picture from google for the score board.
for each ro ...
- 2011-07-22 23:26
- 浏览 1279
- 分类:行业应用
after i wrote a blog about spring & jpa settings: http://jellyfish.iteye.com/admin/blogs/899281, a friend asked me a question about xa on jpa.
last time i did xa was the year 2002, so i figured maybe it's time to revisit this topic to see how things have changed since then. well, a lot, frank ...
- 2011-02-10 12:15
- 浏览 1870
- 分类:编程语言
recently, i've seen an interesting post: http://www.iteye.com/topic/595321
, it's a java implementation of tetris. while being a long time game player (my first game was the gold digger on an ibm xt back in 1988, subsequently i played koei's romance of 3 kingdoms, from ii - xi, among others), this i ...
- 2011-02-05 11:04
- 浏览 1529
- 分类:编程语言
this is to show how to setup jpa with spring, using hibernate and eclipselink respectively. we are not talking about orm, which is a separate topic. so i am going to use a simple pojo.
first, let's create a simple class:
package my.test;
public class book
{
public int bookid;
publi ...
- 2011-01-29 03:55
- 浏览 3398
- 分类:企业架构
in spreadsheets, such as excel, we can write simple formules like the following:
here c4 = a3 a5, so if a3=5 and a5=7, then c4=12. if we change a3 to 6 and hit enter, then c4 is automatically changed to 13. so in the background, there is a dependency graph among the cells. we can explicitl ...
- 2010-11-19 03:00
- 浏览 2023
- 分类:企业架构
http://www.iteye.com/topic/569275
a simple google on "100 prisoners riddle" yields the following two insights:
http://www.algonet.se/~ug/projects/lightbulb/
http://www.ocf.berkeley.edu/~wwu/papers/100prisonerslightbulb.pdf
the second one is a pdf, which i appended here.
in ...
- 2010-09-18 04:58
- 浏览 965
- 分类:行业应用
i've seen these two:
http://www.iteye.com/topic/711162?page=13
http://www.iteye.com/topic/713259
but i am not sure whether i missed something or the majority missed something. though the chancee of later is slim, i am going to take the chance.
say we have 100 numbers and we are break them i ...
- 2010-07-16 00:11
- 浏览 1888
- 分类:编程语言
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continue on: http://jellyfish.iteye.com/admin/blogs/610841, but this time we take a different approach, using ranged variables.
first, define all the attributes we need with a range. the reason we need this twist is that later on we can "rule out" (remove values which are not possible b ...
- 2010-06-30 04:30
- 浏览 1547
- 分类:企业架构
another brain teaser, titled 一道应聘智力题的编程求解
, http://www.iteye.com/topic/608112
.
this is the einsten's puzzle. there are a few variations but the puzzle is the same.
the consensus is that the brutal force way of looping through all possibilities is taking a long time, if not impossible. sinc ...
- 2010-03-09 00:36
- 浏览 1348
- 分类:编程语言
my minimal requirements:
free
theme customizable, including fg/bd colors, axises
can draw > 1 graphs
can show data on the graphs(tooltips, e.g.)
flot: http://code.google.com/p/flot/ good and free
graphael: http://g.raphaeljs.com/ this one can show multiple y values for a given x value if ...
- 2010-02-09 06:36
- 浏览 936
- 分类:web前端
here are the considerations of general web site design:
1. color theme: there is a color theory, namely using "compatible" colors. for example, http://www.hypergurl.com/colormatch.php.
2. master layout: fonts, icons(and address bar icon), menus, content, ads
3. authentication/a ...
- 2010-01-22 23:38
- 浏览 912
- 分类:互联网
flot is an open source javascript charting tool. i need to plot an interest rate curve in a web page, so the x-axis is date.
here is an example modified from the file interacting.html in the flot example package
- 2010-01-22 23:18
- 浏览 2124
- 分类:web前端
in web applications, one of the markups/decorations is rounded corners.
there are a lot of ways to do this, e.g., http://www.devwebpro.com/25-rounded-corners-techniques-with-css/.
recently, i have the requirement to do this with minimal pictures envolved because pictures are considered not s ...
- 2010-01-22 22:59
- 浏览 995
- 分类:web前端
having read a lot of discussion on ddd, i feel there is a misleading perception. anyhow, this is just my experience.
most of the discussion and examples in the ddd discussion are related to database persistence. actually, in my experience, this is the least concern is ddd. the dao design one way ...
- 2010-01-16 02:42
- 浏览 1157
- 分类:行业应用
complex numbers, such as 2 5i where i = sqrt(-1), have extensive applications in math and physics. so it deserves an another look itself. in this note, i'll go through the decisions i make in the design/modeling. these decisions, i believe, not only work in this case, but also in other common cases ...
- 2010-01-14 04:49
- 浏览 1249
- 分类:编程语言
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