visioning exercise

Exercise 3-70 OriginalCode(Define (merge-weighted S1 s2 weight) (Cond ((stream-null s1) S2) ((stream-null S2) s1) (Else ( Let ((cars1 (stream-car s1)) (cars2 (stream-car S2) )) (Cond ( ( weight cars1 ) ( weight cars2 ) ( cons-stream cars1 (merge-weighted (stream-cdr s1) s2 weight)) ) ((= (weight cars1) (weight cars2)) (cons-stream cars1 (merge-weighted (stream-cdr s1) s2 weight ))) (else (cons-stream cars2 (merge-weighted s1 (stream-c

Exercise 2.66This problem is equivalent to two fork tree in the actual project of one application, we still need to use the previous three processes learned: entry, Left-branch, Right-branch. The three functions are taking out the node, the left branch and the right branch. And according to the topic request, here also need a key that gets the value. Of course, as shown in the book above, key does not need to be written out, and here is a desire to th

Python exercise Questions 4-digit three-digit non-repetition, python exercise questions I heard that doing exercises is the best way to master a programming language, so I will try to have over 100 questions first. ---------------------------------------------------------------------- [Python exercise 001]There are 1, 2, 3, and 4 numbers. How many three number

Oracle Database exercise example and answer sharing, oracle exercise questions I. Create a table 1. create table empgj (empno number () primary key, ename varchar2 (10), 2.job varchar2 (9), mgr number (), hiredate date, sal number ), comm 3. number (7, 2), deptno number (2, 0); 4. -- 1 5. insert into empgj (empno, ename, job, mgr, hiredate, sal, comm, deptno) values 6. (7369, 'Smith ', 'cler', 7902, to_dat

Exercise 3-1 Score StatisticsEnter some student's score, which score appears the most times? If there are multiple parallel, from small to large output.Task 1: Non-negative integers with fractions not exceeding 100Task 2: The score does not exceed 100 of the nonnegative real number, but retains a maximum of two decimal places.Task 1#include Task 2#include Summary: Task 2 degree set to double, then to int, with floor (m+0.5), previously encountered, re

Razor Exercise 4, razor exercise Practice Razor's logic processing today. Generally, the following 1. if 2. else 3. else if 4. switch In the following demonstration, Insus. NET demonstrates 1, 2, and 4 respectively:The xxx. cshtml code is as follows:@ {Layout = null; string laborDay = ""; string name = "Insus. NET "; string [] colors = {" ff0000 "," 0000ff "," 00ff00 "}; // red, blue, green} Animation demo

Exercise 2.70Now that you want to decode it, you have to define the tree first.(DefineTree(generate-huffman-tree '((A 2) ( NA ) ( BOOM 1) ( SHA 3) (GET 2) ( YIP 9) (JOB 2) (WAH 1)) And then just to encode the lyrics given in the question.(define message-1 '(Get a job))(define message-2 '(Sha nana- na na na na na na))(define message-3 '(Wah Yip Yip Yip Yip Yip Yip Yip Yip Yip))(define message-4 '(Sha Boom)) (encode message-1 tree); Value: (1 1 0 0

Exercise 4-5 OriginalExercise 4.5. Scheme allows an additional syntax for cond clauses, (= =). If evaluates to a true value, then is evaluated. Its value must is a procedure of one argument; This procedure was then invoked on the value of the, and the result is returned as the value of the the COND expression. For example(cond ((assoc ‘b ‘((a 1) (b 2))) => cadr) (else false))Returns 2. Modify the handling of cond so, it supports this extende

Exercise 4-6 OriginalExercise 4.6. Let expressions is derived expressions, because(Let () ... ( )) )is equivalent to((Lambda (...)))Implement a syntactic transformation let->combination that reduces evaluating let expressions to evaluating combination S of the type shown above, and add the appropriate clause to eval-handle let expressions.AnalysisThis problem requires that we convert let expressions into corresponding expressions.(Let () ... ( )) )Fro

Exercise 4-4 OriginalExercise 4.4. Recall the definitions of the special forms and and or from Chapter 1:And:the expressions is evaluated from left to right. If any expression evaluates to False, False is returned; Any remaining expressions is not evaluated. If all the expressions evaluate to true values, the value of the last expression is returned. If there is no expressions then true is returned.Or:the expressions is evaluated from left to right. I

Exercise 4-1 OriginalExercise 4.1. Notice that we cannot-whether the Metacircular evaluator evaluates operands from left to right or from right to left. Its evaluation order was inherited from the underlying lisp:if the arguments to cons in List-of-values was evaluated from Left-to-right, then list-of-values'll evaluate operands from left to right; And if the arguments to cons is evaluated from right to left, then list-ofvalues'll evaluate operands fr

Exercise 3-77 OriginalExercise 3.77. The integral procedure used above was analogous to the "implicit" definition of the infinite stream of integers 3.5.2. Alternatively, we can give a definition of integral that's more like Integers-starting-from (also in section 3.5. 2):(Define (integral integrand initial-value DT) (cons-stream initial-value (if (stream-null integrand) /c5> the-empty-stream (integral (stream-cd R integrand)(+ (* DT (stream-car int

Exercise 3-66 OriginalExercise 3.66. Examine the stream (pairs integers integers). Can you do any general comments about the order in which the pairs is placed into the stream? For example, about how many pairs precede the pair (1,100)? The pair (99,100)? The pair (100,100)? (If you can make precise mathematical statements this, all the better. But feel-give more qualitative answers if you find yourself getting bogged down.)AnalysisThere are two scena

Exercise 1.20This problem requires us to study the GCD function in the book in the context of both the regular order and the application sequence, and also to figure out the number of actual remainder operations performed.The first question in the question is the application sequence, but since the application sequence is relatively simple, let's take a look at the application sequence:(GCD 206 40)(GCD 40 6)(GCD 6 4)(GCD 4 2)(GCD 2 0)2Therefore (GCD 2

Exercise (3-3) calculation (a + B) * c value, exercise 3-3 Question-exercise (3-3) Calculate (a + B) * c value Source Introduction to computing B 2010 Description Calculates th

Struts exercise-form submission, struts exercise form Exercise to prevent repeated submission of forms: Before performing struts exercises, you must first prepare for creating a web project, import the jar package and configure web. xml. I usually import the following jar packages at one time (it may not be necessary to do so many exercises with one knowledge poi

HTML5 basics Exercise 1. HTML5 basics exercise 1. What is the HTML version before HTML5? A:In HTML 4.01 2. Is doctype correct for HTML5? A: 3. In HTML5, Which element is used to combine the title element? A: 4. Is HTML5 supported?Element? A:No 5. Is HTML5 supported?Element? Answer: No 6. In HTML5, onblur and onfocus are: A:Event attributes 7. The correct HTML5 elements used to play HTML5 video files a

Razor Exercise 2, razor exercise Razor data types include string, int, float, decimal, and bool.In addition, data type conversion is required. The common methods are as follows:ToString (): converts the data type to string ). This is the same as the C # syntax.IsBool () and AsBool () convert strings to Boolean values ).IsFloat () and AsFloat () convert strings to floating-point ).IsInt () and AsInt () conv

Razor Exercise 3, razor exercise In Razor syntax, it uses three types of material loop processing: for, while, and foreach. The following Insus. NET illustrates an example in the ASP. net mvc environment by appending the source code:While: Animation demonstration:

Label: style color for SP on BS amp AD Size6. set $ a, B \ In M_n $, $ A $ to a positive matrix, and $ B $ to a Hermite matrix. then $ \ Bex a + B \ mbox {positive definite when and only when} \ lm_j (a ^ {-1} B)>-1, \ quad j = 1, \ cdots, N. \ EEx $Proof: $ \ beex \ Bea \ quad A + B \ mbox {Zhengding }\\ \ LRA e + A ^ {-1/2} Ba ^ {-1/2} \ mbox {Zhengding }\\ \ LRA \ lm_j (a ^ {-1/2} Ba ^ {-1/2})> -1, \ quad \ forall \ j = 1, \ cdots, n \ \ LRA \ lm_j (a ^ {-1} B)>-1, \ quad j = 1, \ cdots, N,