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What is an example of the Liskov Substitution Principle?

...o a Square, then SetWidth and SetHeight doesn't make sense because setting one would change the other to match it. In this case Square fails the Liskov Substitution Test with Rectangle and the abstraction of having Square inherit from Rectangle is a bad one. Y'all should check out the other price...
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Printf width specifier to maintain precision of floating-point value

...t to the most significant decimal)”. A simple example would be to print one seventh as in: #include <float.h> int Digs = DECIMAL_DIG; double OneSeventh = 1.0/7.0; printf("%.*e\n", Digs, OneSeventh); // 1.428571428571428492127e-01 But let's dig deeper ... Mathematically, the answer is ...
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How to “git show” a merge commit with combined diff output even when every changed file agrees with

After doing a "simple" merge (one without conflicts), git show usually only shows something like 11 Answers ...
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Joining two lists together

... No one's really gone into when to use which method. AddRange edits a list in place, adding the second list to it (as if you called .Add(foo) a bunch of times). The Concat and Union extension methods don't change the original lis...
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How to open a specific port such as 9090 in Google Compute Engine

...ed Jan 12 '14 at 18:54 E. AndersonE. Anderson 2,5261313 silver badges1616 bronze badges ...
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How to get box-shadow on left & right sides only

... solution described here. You can get close with multiple box-shadows; one for each side box-shadow: 12px 0 15px -4px rgba(31, 73, 125, 0.8), -12px 0 8px -4px rgba(31, 73, 125, 0.8); http://jsfiddle.net/YJDdp/ Edit Add 2 more box-shadows for the top and bottom up front to mask out the that ...
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Visual Studio 2010 always thinks project is out of date, but nothing has changed

...ened to me. Probably pretty obscure, but I was compiling the project from one computer, then another, and discovered I'd accidentally set the time to AM on one computer and PM on the other. The drastic time difference caused one of the computers to either always compile everything, or never to com...
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Throw an error in a MySQL trigger

... Here is one hack that may work. It isn't clean, but it looks like it might work: Essentially, you just try to update a column that doesn't exist. share ...
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Java generics - why is “extends T” allowed but not “implements T”?

... 'super' - that is, is this class to operate with assignable to that other one (extends), or is this class assignable from that one (super). share | improve this answer | fol...
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How to set Oracle's Java as the default Java in Ubuntu?

...ttention to the asterisk before the numbers on the left and if the correct one is not set choose the correct one by typing the number of it and pressing enter. now test your java: $ java -version if you get something like the following, you are good to go: java version "1.8.0_05" Java(TM) SE Run...