# AI News, Difference between revisions of "How to Think Like a Computer Scientist: Learning with Python 2nd Edition/Solutions"

## Difference between revisions of "How to Think Like a Computer Scientist: Learning with Python 2nd Edition/Solutions"

The following section contains answers to the exercises in the Book.

Why does a call to num_digits(-24) result in an infinite loop (hint: -1/10 evaluates to -1)?

The loop will end when n = 0, and per above -1/10 == -1, causing an infinite loop.

Encapsulate: in a function named count_letters, and generalize it so that it accepts the string and the letter as arguments.

Now rewrite the count_letters function so that instead of traversing the string, it repeatedly calls find (the version from Optional parameters), with the optional third parameter to locate new occurences of the letter being counted.

ceil function finds the lowest integeral value greater than or equal to x.

deepcopy would have come handy in exercises you didn't have to solve regarding object reference, thus no answer is excpected here.

Python Find String Method

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Excel: Find the Position of the First Letter in a Text String

The video explains how to use Excel to find the position of the alpha character in a text string. The formula generated in the video is: {=MATCH(TRUE ...

How to find index of a character or string in java?

get character index string java, find index character string java, character index string java, character at index string java, get character at index of string java, ...

Find Text in String With Excel SEARCH Function

The SEARCH function looks for a text string, within another text string. The SEARCH function ..

IF Function with Partial Match on Text String or "Contains" Criteria

This video demonstrates how to test for a partial match on a text string in the context of an IF function. The solution uses the SEARCH and ISNUMBER functions ...

IF Function with Multiple Partial Match Text String Criteria

This video demonstrates how to specify multiple partial text string match criteria in a logical test. For example does text contain X and Y. The solution uses the ...

JavaScript Tips and Tricks 03 - Count number of characters

This JavaScript shows you how to count the repetition of all the characters in a string using associative array.

Excel Magic Trick 323: Partial Text VLOOKUP (Fuzzy Match)

Two formulas: VLOOKUP function with wild card criteria for the lookup_value and LOOKUP / SEARCH functions formula with 2^15 number. See what happens ...

Excel Magic Trick 699: VLOOKUP Mixed Number & Letter Partial Text Extract For Lookup Value

Complex text extract formula that extracts text to use in VLOOKUP to lookup values and return data. See these Tricks: 1. Extract all letters from text string 2.

Microsoft Access Tutorial: String Functions (Left, Right, InStr, Trim)

In this Microsoft Access tutorial, I'll show you how to break up text fields into smaller parts using Left, Right, Trim, and InStr.