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Category: computer science

Computer science: an idea about sorting

By Jack Posted on March 27, 2023 Posted in computer science No Comments

Self-tutoring about computer science: the tutor mentions a thought about using sorting algorithms. Among comparison sorts, merge sort and quicksort are both, for average case, order nlogn, which seems about the best you can get with comparison sorts. With actual …

Computer science: an idea about sorting Read more »

Computer Science: Python: get it sorted

By Jack Posted on February 23, 2023 Posted in computer science No Comments

Self-tutoring about Python: the tutor mentions the sorted() function. sorted() is a Python built-in function that can accept lists and even sets. The strength of sorted() is that it doesn’t change the input; rather, it returns a sorted list of …

Computer Science: Python: get it sorted Read more »

Python: carriage return

By Jack Posted on February 19, 2023 Posted in computer science No Comments

Self-tutoring about Python: the tutor mentions a curiosity. Experimenting with the print function on the Python interpreter, I noticed that print(‘hello\rain’) will yield ainlo The reason, I believe, is that \r is interpreted as the carriage return. As such, it …

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Computer science: Python: user-defined constants

By Jack Posted on February 17, 2023 Posted in computer science No Comments

Self-tutoring about Python: the tutor mentions constants. To my knowledge, Python doesn’t have user-defined constants. However, there is a way to accomplish a similar impression: a namespace. A namespace, in this case, is a separate file wherein the constant is …

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Computer science: Python: let’s sort a list.

By Jack Posted on February 16, 2023 Posted in computer science No Comments

Self-tutoring about computer science: the tutor mentions the sort() method in Python. Python lists can be sorted using the_list.sort(). However, it might not work the way one would first think. the_list.sort() rewrites the_list in sorted order. However, it doesn’t return …

Computer science: Python: let’s sort a list. Read more »

Computer science: memoization

By Jack Posted on December 10, 2021 Posted in computer science No Comments

Tutoring computer science, terms arise. The tutor mentions memoization. Let’s imagine a function called F1. Let’s further imagine that F1 uses a lot of resources – calls to it take a lot of computation power. In such a situation, you …

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Comp sci: type parameter

By Jack Posted on December 7, 2021 Posted in computer science No Comments

Tutoring computer science, terms are important. The tutor mentions type parameter. The motivation for a type parameter is easiest to imagine with a strongly typed language like Java. Typically, such a language insists on knowing the type of an argument …

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Comp sci: static methods

By Jack Posted on November 30, 2021 Posted in computer science No Comments

Tutoring computer science, static methods can arise. The specific language does provide meaningful context in how a programmer perceives static methods. However, the general idea is that a static method can be invoked from the class itself rather than needing …

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Comp Sci: code motion

By Jack Posted on November 24, 2021 Posted in computer science No Comments

Tutoring computer science, its own terms arise. The tutor mentions code motion. Code motion refers to evaluating a sentry value once, outside a loop, then storing the value in a variable which will be used for the test in the …

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Programming: newline in rhs expression: Python vs JavaScript

By Jack Posted on September 22, 2021 Posted in programming No Comments

Self-tutoring about programming: the tutor mentions a difference between Python and JavaScript he’s noticed. With Python, if you want to continue to the next line (perhaps for easier reading), it seems a backslash, then Return, will work: the_var= (3 + …

Programming: newline in rhs expression: Python vs JavaScript Read more »

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