sparrow | 郑钢《自制编程语言》随书源码及读书笔记

by yifengyou C Version: Current License: No License

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | sparrow Summary

sparrow is a C library. sparrow has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

郑钢《自制编程语言》随书源码及读书笔记

Support

Quality

Security

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Support

sparrow has a low active ecosystem.

It has 165 star(s) with 73 fork(s). There are 11 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 1 have been closed. On average issues are closed in 10 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of sparrow is current.

Quality

sparrow has no bugs reported.

Security

sparrow has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

sparrow does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

sparrow releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

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sparrow Key Features

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sparrow Examples and Code Snippets

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Community Discussions

Trending Discussions on sparrow

Save structure function leaves a spare place in a file instead of writing an array

RavenDb: Document Refresh feature does not run at nor after the specified time by @refresh flag

Working through duplicates along rows in DataFrame and deleting all except the last one in Python Pandas

Error Handling in Python3 - Finding location of specific letters in a list of words

How to get the value of Gather input widget in Twilio function "let val = event.widgets.Mortgage_info.Digits.value;"?

If /else statement in Twilio Function always return false

How to merge two rows having null values into one row replacing null values?

Lookup between columns on different dataframes with if condition (Pandas)

errors with structure save and load function

Data Frame Column Copying resulting in Nan

QUESTION

Save structure function leaves a spare place in a file instead of writing an array

Asked 2021-May-30 at 10:50

#include 

struct BirdHome{
  char area[500];
  char heightcm[100];
  char feederquantity[10];
  char hasNest[5];
};
struct Bird{
  char isRinged[5];
  char nameSpecies[50];
  char birdAgeMonths[500];
  struct BirdHome hom;
  char gender[6];
};
struct Bird birds;

int main(void){
  FILE *oput;
  int max=100;
  int count = 0;
  char filename[100];
  printf("file name? : ");
  scanf("%s", &filename);
  count = load(filename, &birds, max);
    if (count == 0)
      printf("No structures loaded\n");
    else (
      printf("Data loaded\n")
    );
  save(&birds, oput);
  return 0;
}


int load(char *filename, struct Bird *birds, int max){
int count = 0;
FILE *fp = fopen(filename, "r");
char line[100 * 4];
  if (fp == NULL)
    return 1;
  while (count < max && fgets(line, sizeof(line), fp) != NULL){
    sscanf(line, "%s %s %s %s %s %s %s %s", birds[count].isRinged, birds[count].nameSpecies,
    birds[count].birdAgeMonths, birds[count].hom.area,
    birds[count].hom.heightcm, birds[count].hom.feederquantity,
    birds[count].hom.hasNest,birds[count].gender);
    count++;
  }
fclose(fp);
return count;
}


int save (struct Bird *birds, FILE *oput){
  int i;
  oput=fopen("birdssave.txt","w");
  for (i=0;i<3;i++){
  fprintf(oput,"%s %s %s %s %s %s %s %s\n",birds[i].isRinged, birds[i].nameSpecies,
  birds[i].birdAgeMonths, birds[i].hom.area,
  birds[i].hom.heightcm, birds[i].hom.feederquantity,
  birds[i].hom.hasNest,birds[i].gender);
  }
  fclose(oput);
}

...

ANSWER

Answered 2021-May-30 at 10:50

The load function is made unproperly so it doesn't work. The normal functions does a lot more things to do. Here is the text of it with the needed commentaries

Source https://stackoverflow.com/questions/66243657

QUESTION

RavenDb: Document Refresh feature does not run at nor after the specified time by @refresh flag

Asked 2021-May-18 at 11:28

I need to mark documets as expired after some time and therefore I am trying to use @refresh feature to re-run subscription and to compute my 'expired' flag. I know there is 'Document expiration' feature but this one removes data which I don't want.

I have turned Refresh feature in settings and added @refresh UTC datetime in metadata for required documents. For example I added manually this document:

...

ANSWER

Answered 2021-May-18 at 11:28

The bug related to document that was added via cluster transaction, the workaround for now would be to not use cluster transaction.

I have opened an issue on bug tracker, https://issues.hibernatingrhinos.com/issue/RavenDB-16710

Source https://stackoverflow.com/questions/67330275

QUESTION

Working through duplicates along rows in DataFrame and deleting all except the last one in Python Pandas

Asked 2021-May-18 at 04:44

I am miserably stuck at Pandas Data Cleaning. I have made a very simple example to demonstrate my problem. For each row, I want to delete/alter the duplicate and keep the last one. Currently, my DataFrame is 'animals'. And I want it to be the DataFrame 'animals_clean'

Imagine this DataFrame. You can see duplicates along axis=0, e.g. 'cat' is repeated in row 0

...

ANSWER

Answered 2021-May-17 at 23:52

Try apply + mask + duplicated with keep='last':

Source https://stackoverflow.com/questions/67578244

QUESTION

Error Handling in Python3 - Finding location of specific letters in a list of words

Asked 2021-Apr-28 at 19:40

I am running into issues getting my code to run through a list of words and list the location of the letters in the list. It works fine in listing location for the first two words, but when it encounters a word without the specified letter, the code skips. I will paste the problem and my current code as well as current output below.

words = ["dog", "sparrow", "cat", "frog"]

#You may modify the lines of code above, but don't move them! #When you Submit your code, we'll change these lines to #assign different values to the variables.

#This program is supposed to print the location of the 'o' #in each word in the list. However, line 22 causes an #error if 'o' is not in the word. Add try/except blocks #to print "Not found" when the word does not have an 'o'. #However, when the current word does not have an 'o', the #program should continue to behave as it does now.

#Hint: don't worry that you don't know how line 18 works. #All you need to know is that it may cause an error.

#You may not use any conditionals.

#Fix this code!

My Code

...

ANSWER

Answered 2021-Apr-28 at 19:26

You only need to add try-except block like this:

Source https://stackoverflow.com/questions/67305932

QUESTION

How to get the value of Gather input widget in Twilio function "let val = event.widgets.Mortgage_info.Digits.value;"?

Asked 2021-Apr-28 at 11:35

I can't get the value of my gather input widget in Twilio function, I always get an error

This is the name of the gather input widget in Twilio studio

This variable is not working. let val = event.widgets.Mortgage_info.Digits.value;

...

ANSWER

Answered 2021-Apr-28 at 11:35

You need to pass the value of `{{widgets.Mortgage_info.Digits}}`` into the Twilio Function via the Run Function Widget Function Parameters.

You can see how this may work by looking at this code example.

Using Run Function widget in Studio

Source https://stackoverflow.com/questions/67295409

QUESTION

If /else statement in Twilio Function always return false

Asked 2021-Apr-28 at 10:56

I want to test my if else condition in the Twilio function. The condition is if the user will text "Hi", Twilio will send him a quote. The problem the condition always runs false even if I texted "Hi". I'm not sure if the event.Body is the right code to get the value of the message body.

...

ANSWER

Answered 2021-Apr-28 at 10:56

Step 1,

Use the split Based Widget and input to the "Variable to Test" trigger.message.Body
Then add a condition in the Split Based Widget that could be found in the Transitions tab, if the incoming messages is equal to "Hi" then it will proceed to the next widget

Step 2,

Then add a message widget that tells the sender Fetching quote, the purpose of this is just to tell the sender that your processing the quoted message. This is just optional, you can remove this if you want.

Step 3

Then create a function to parse the external API for the quoted message. Make sure to add the got module as Dependencies

Step 4

And Lastly Parsed the Quote in the Body of the Send Message widget.

Source https://stackoverflow.com/questions/67264688

QUESTION

How to merge two rows having null values into one row replacing null values?

Asked 2021-Apr-21 at 18:46

I'm having the following results from my sql query:

id sp_firstname sp_lastname member_firstname member_lastname 1 NULL NULL John Smith 2 Dejuan McLaughlin NULL NULL 2 NULL NULL Jack Sparrow 3 John Walker NULL NULL 3 NULL NULL Sherlock Holmes 4 Mellie Durgan NULL NULL 4 NULL NULL John Waston 5 Lucy Snider NULL NULL

Whereas what I need to achieve is this:

id sp_firstname sp_lastname member_firstname member_lastname 1 NULL NULL John Smith 2 Dejuan McLaughlin Jack Sparrow 3 John Walker Sherlock Holmes 4 Mellie Durgan John Waston 5 Lucy Snider NULL NULL

Basically, I need to somehow merge pairs of rows that sort of have nulls crosswise.

After looking through SO answers, I could only find variants of this problem when NULL values needed to be substituted by numbers, and in that case people used max function combined with group by.

However I have several joins in my table and my NULL values need to be substituted with strings, not numbers, so max wouldn't really work here (as I thought).

Here's my sql code:

...

ANSWER

Answered 2021-Apr-21 at 18:46

You can wrap your results with an outer query to aggregate the columns using max and group by the id

Source https://stackoverflow.com/questions/67201398

QUESTION

Lookup between columns on different dataframes with if condition (Pandas)

Asked 2021-Mar-06 at 19:05

I have a dataframe that is structured like this:

...

ANSWER

Answered 2021-Mar-06 at 18:43

Use map here with fillna:

Source https://stackoverflow.com/questions/66509259

QUESTION

errors with structure save and load function

Asked 2021-Feb-18 at 14:06

#include 
#include 

struct birdhome{
  int area;
  int heightcm;
  int feederquantity;
  char hasNest[6];
};
struct bird{
  char isRinged[6];
  char nameSpecies[50];
  int birdAgeMonths;
  struct BirdHome *hom;
  char gender[7];
};

int save(char * filename, struct bird *st, int n);
int load(char * filename);

int main(void)
{
    char * filename = "birds.dat";
    struct bird birds[] = { "True","sparrow",3,10,20,2,"False","Male","False","crane",24,50,100,6,"True","Female","False","False","griffin",10,100,80,1,"False","Male" };
    int n = sizeof(struct bird) / sizeof(birds[0]);

    save(filename, birds, n);
    load(filename);
    return 0;
}

int save(char * filename, struct bird * st, int n)
{
    FILE * fp;
    char *c;
    
    int size = n * sizeof(struct bird);

    if ((fp = fopen(filename, "wb")) == NULL)
    {
        perror("Error occured while opening file");
        return 1;
    }
   
    c = (char *)&n;
    for (int i = 0; i0)
    {
        i = getc(fp);
        if (i == EOF) break;
        *c = i;
        c++;
        m--;
    }
 
    n = *pti;

   
    struct bird * ptr = (struct bird *) malloc(n * sizeof(struct bird));
    c = (char *)ptr;
    
    while ((i= getc(fp))!=EOF)
    {
        *c = i;
        c++;
    }
   
    printf("\n%d birds in the file stored\n\n", n);

    for (int k = 0; kisRinged, (ptr + k)->nameSpecies,(ptr + k)->birdAgeMonths,(ptr + k)->hom.area,(ptr + k)->hom.heightcm,(ptr + k)->hom.feederquantity,(ptr + k)->hom.hasNest,(ptr + k)->gender);
    }

...

ANSWER

Answered 2021-Feb-18 at 09:40

The problem is that bird.hom is a pointer. Saving a pointer to a file is not a useful thing to do, because memory addresses change from one process to another. It's also not saving the contents of the BirdHome structure. And your initialization of birds doesn't work, because you can't initialize members of an indirect structure as part of the main structure.

You should declare it as an embedded structure rather than a pointer.

Source https://stackoverflow.com/questions/66256351

QUESTION

Data Frame Column Copying resulting in Nan

Asked 2021-Feb-16 at 09:46

I'm trying to copy data over from one Panadas DataFrame into another and I'm getting some strange results. For example if I have:

...

ANSWER

Answered 2021-Feb-15 at 17:15

Using your code I get this (Jupiter Notebook). So your code seems to work right?

Source https://stackoverflow.com/questions/66212126

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install sparrow

You can download it from GitHub.

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