What is Solid: Definition and 1000 Discussions

In object-oriented computer programming, SOLID is a mnemonic acronym for five design principles intended to make software designs more understandable, flexible, and maintainable. The principles are a subset of many principles promoted by American software engineer and instructor Robert C. Martin, first introduced in his 2000 paper Design Principles and Design Patterns.The SOLID concepts are

The Single-responsibility principle: "There should never be more than one reason for a class to change." In other words, every class should have only one responsibility.
The Open–closed principle: "Software entities ... should be open for extension, but closed for modification."
The Liskov substitution principle: "Functions that use pointers or references to base classes must be able to use objects of derived classes without knowing it". See also design by contract.
The Interface segregation principle: "Many client-specific interfaces are better than one general-purpose interface."
The Dependency inversion principle: "Depend upon abstractions, [not] concretions."The SOLID acronym was introduced later, around 2004, by Michael Feathers.Although the SOLID principles apply to any object-oriented design, they can also form a core philosophy for methodologies such as agile development or adaptive software development.

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  1. RedDelicious

    Use Gauss's Law to find the charge contained in the solid hemisphere

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  2. M

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  3. N

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  4. G

    I Why does high surface energy of the solid have more wetting?

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  5. F

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  6. karush

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  7. Theia

    MHB Volume of Solid of Revolution of f(x)

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  8. amjad-sh

    Physics Experimental solid state physics

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  9. N

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  10. M

    Static structural analysis on a solid sphere?

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  11. F

    Solid Rocket Fuel and Oxidant Agent

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  12. P

    I Diamagnetism vs. paramagnetism in solid state

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  13. N

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  14. A

    Solid State Best solid state physics textbook that can replace Kittel

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  15. chikou24i

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  16. memoryerasure1

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  17. G

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  18. K

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  19. Useful nucleus

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  20. D

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  21. Adoniram

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  22. C

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  23. Andreol263

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  24. N

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  25. Suman Saha

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  26. N

    B Why does light transmit through glass/diamond, but not solid

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  27. N

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  29. A

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  31. G

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  32. J

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  33. T

    Why do atoms in a solid act like hard balls?

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  34. B

    Speed of a solid cylinder after unwinding

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  35. S

    Does Entropy Change Consider Irreversibility in Solids and Liquids?

    usually, entropy change in solid and liquid is formulated as Cp(or Cv)ln(T2/T1) or Q/T(integral)+ Sgen. so, considering the former and the latter equations, Do their entropy changes include irreversibility due to Sgen? And next question, reservoir has no change in temperature and volume...
  36. S

    Electric field due to a Solid Non-Conducting Sphere

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  37. H

    Fluid solid interaction boundary condition problem

    I have come across the paper attached in which a 1D fluid piston is modeled. I have question on the boundary conditions (BCs) of the system. Essentially, the problem consists of a fluid chamber in contact with a spring (a mass -spring system). ALE is used to move the mesh. I am not certain...
  38. kini.Amith

    Math required for Statistical and solid state physics

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  39. Einj

    Integral of angular functions over d-dim solid angle

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  40. H

    Thermodynamics of hyperelastic solid

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  41. Han_Cholo

    Solid disk frictional torque magnitude

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  42. M

    Solid State Looking for Solid State Physics Textbooks? Check Out These Top Picks!

    Hi everyone, I was hoping you guys could recommend some good solid-state physics textbooks or lecture notes. Thanks in advance.
  43. X

    Ionization & photoelectrons in x-ray solid state detectors

    As far as i understand, this is the principle of solid state x-ray detectors: 1. A photon of energy E enters the detector and goes through photoelectric absorption 2. As a result a photoelectron with energy (E - Φ) is ejected, where Φ is the binding energy required to eject the photoelectron...
  44. A

    Selection of gearbox for rotating a solid shaft

    Hello Being practical I have been stuck in one question like if I have a 320 mm diameter and 805 mm long shaft which is suppose to rotate through gearbox how do I need to select a gearbox. As per I think I need to calculate the torque of shaft and find the torque of gearbox and based on that I...
  45. S

    How Does Replacing a Sphere Affect Water Level in a Bowl?

    A small solid sphere of mass M0, of radius R0, and of uniform density ρ0 is placed in a large bowl containing water. It floats and the level of the water in the dish is L. Given the information below, determine the possible effects on the water level L, (R-Rises, F-Falls, U-Unchanged), when that...
  46. MCarsten

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  47. Conservation

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  48. imadrea

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  49. Y

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  50. C

    MHB  Volume of solid in first octant

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