Good old days!

My good friend Raj sent me some pic­tures he took from Chi­nese new year 2006, and real­ly brought back some nice mem­o­ries from the days gone by! As some of you may know, I per­formed on stage for Chi­nese new year in 2006 in Trafal­gar Square, in the mid­dle of the freez­ing cold in Feb! …

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Imperative vs. Declarative Languages

Fol­low­ing my pre­vi­ous post on mul­ti-lan­guage (poly­glot) and mul­ti-par­a­digm (poly-par­a­digm) devel­op­ment, I thought I’d con­tin­ue on the same thread for a lit­tle and do some com­par­isons on some of the pop­u­lar types of pro­gram­ming lan­guages. Def­i­n­i­tion: An imper­a­tive pro­gram­ming lan­guage such as C# or Java allows you to spec­i­fy step-by-step how a prob­lem should be …

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Less is MORE

Just fin­ished watch­ing an inter­est­ing sem­i­nar video by the guys from Object Men­tor (a con­sul­tant com­pa­ny found­ed by Robert C Mar­tin, the father of agile devel­op­ment) at: http://www.infoq.com/presentations/polyglot-polyparadigm-programming The video is about an hour long and cov­ered a large num­ber of top­ics around using dif­fer­ent lan­guages (poly­glot) and dif­fer­ent pro­gram­ming par­a­digms (poly-par­a­digm) to sim­pli­fy and …

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Buzzword Buster – Cross-Cutting Concern

Def­i­n­i­tion: A Cross-Cut­t­ing Con­cern is a con­cern your appli­ca­tion needs to address that is unre­lat­ed to your application’s prob­lem domain, and ‘cuts across’ oth­er con­cerns. Typ­i­cal exam­ples include: log­ging per­sis­tence secu­ri­ty error han­dling They are usu­al­ly dif­fi­cult to decom­pose from the rest of the sys­tem and result in tan­gled code. Address­ing these cross-cut­t­ing con­cerns will …

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Buzzword Buster — DSL

Def­i­n­i­tion: A Domain Specif­ic Lan­guage (DSL) is a pro­gram­ming lan­guage that’s ded­i­cat­ed to a par­tic­u­lar prob­lem domain. DSLs are often used to sup­port domain-dri­ve design and mod­el­ling. It’s the oppo­site of gen­er­al pur­pose pro­gram­ming lan­guages such as C# or Java. Advan­tages: Code looks like domain prose. Eas­i­er to under­stand by every­one. Eas­i­er to align with …

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Buzzword Buster — Dependency Inversion Principle

Def­i­n­i­tion: Depen­den­cy Inver­sion Prin­ci­ple refers to a spe­cif­ic form of decou­pling aimed at rend­ing high-lev­­el mod­ules inde­pen­dent of the low-lev­­el mod­ules’ imple­men­ta­tion details. Its prin­ci­ple states: High-lev­­el mod­ules should not depend on low-lev­­el mod­ules, both should depend on abstrac­tions. Abstrac­tions should not depend upon details. Details should depend upon abstrac­tions. Depen­den­cy Inver­sion Prin­ci­ple is often …

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Buzzword Buster — Spaghetti Code

Def­i­n­i­tion: You have Spaghet­ti code when the flow in your appli­ca­tion becomes so com­plex and tan­gled it resem­bles a bowl of spaghet­ti where the dif­fer­ent exe­cu­tion paths are twist­ed and inter­twined it’s hard to make out where they start and end. In soft­ware design, this is usu­al­ly a dan­ger asso­ci­at­ed with pro­ce­dur­al pro­gram­ming or fre­quent, …

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Buzzword Buster – Macaroni Code

Def­i­n­i­tion: You have Mac­a­roni code when your appli­ca­tion is chopped up into many lit­tle pieces and it’s dif­fi­cult to see the big pic­ture which may exist only in your (or some­one else’s!) head. In soft­ware design, you can often end up with Mac­a­roni code when you overuse/misuse/abuse abstrac­tions, and it’s one of the main dan­gers …

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Buzzword Buster — IoC

Def­i­n­i­tion: Inver­sion of Con­trol (IoC) refers to the inver­sion of the flow of con­trol (the order in which indi­vid­ual state­ments, func­tion calls, etc. are exe­cut­ed) in a soft­ware. You’ll often hear the term Hol­ly­wood prin­ci­ple being men­tioned in the same breath as IoC, it sim­ply states “Don’t call us, we’ll call you” which more or …

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