tecla | A Go wrapper for the libtecla command-line editing library | Command Line Interface library
kandi X-RAY | tecla Summary
kandi X-RAY | tecla Summary
Note: If you are looking for a command-line editing library, please use peterh's pure Go line editor, liner (github.com/peterh/liner), instead. This package is a wrapper for Martin Shepherd's, libtecla, command-line editing library (www.astro.caltech.edu/~mcs/tecla/).
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QUESTION
I built a program in pascal using FPC but after this I installed lazarus. So now I'm editing this same pascal program in Lazarus. It works very well to insert, modify and list: name, surname and telephone in a array of record of this type. But the read command is not working for me in this modify procedure. But the read command works well on my Delete procedure for example.
Main problem: **These 3 read command did not work so I modified to readln which fixed it for me and now each one reads my inputs but only with readln, but not with read. **
But why ?
...ANSWER
Answered 2021-Apr-06 at 21:06I think that the short answer to this is that your observation is correct and that the reason is that Read is working as designed. Once FPC's runtime has executed the firstRead it behaves as if it has seen an Eol after what the user typed, and therefore the second and subsequent calls to Read return immediately without waiting for any further user input.
The reason it behaves this was seems to be historical. FPC was based on the Object Pascal of the commercial RAD system Delphi, and although the two have diverged somewhat over the years (e.g. in their different implementations of generics), FPC faithfully reproduces many of the basic details of the Object Pascal language and runtime, including its file handling, of which keyboard input is a special case.
I think that it is legitimate. therefore, to look at the Delphi/Object Pasval documentation of Read. In the online help of Delphi 7, which dates from 20 years ago, the section on Read includes
Description
The Read procedure can be used in Delphi code in the following ways.
For typed files, it reads a file component into a variable. For text files, it reads one or more values into one or more variables.
With a type string variable:
Read reads all characters up to, but not including, the next end-of-line marker or until Eof(F) becomes true; it does not skip to the next line after reading. If the resulting string is longer than the maximum length of the string variable, it is truncated. After the first Read, each subsequent Read sees the end-of-line marker and returns a zero-length string.
Use multiple Readln calls to read successive string values.[emphasis added]
So, the Delphi OLH documents exactly the behaviour you are seeing (that the second and subsequent calls to Read return immediately without gathering any user input) and describes the remedy, which is to use Readln instead. And that's why you see the same behaviour + remedy in FPC.
QUESTION
Does anyone know what went wrong with my code? I'm trying to use Python to control esp32cam but I don't know what went wrong.
Sorry, I'm not sure if I'm posting this correctly as it's my first time asking! This is my code.
I changed the code after Dr.Casual helped (thanks alot btw!) but I'm still having errors. Updated the code.
...ANSWER
Answered 2021-Mar-25 at 16:21try this:
QUESTION
i'm learning python by myself, and started with a simple game with pygame. The game consists, so far, in a ball that's been chased by other balls, i have created a loop that avoid the chasing balls to overlap. The way the loop works its by a nested loop that moves thru a list that includes all the chasing balls, then measures the distance between them, if the distance is less than the ball radius, it is moved away. It seems to work most of the time, but sometimes a ball overlaps. I dont know why, if anyone can take a look at my code and give me a hint i would apreciate it, i think the error happens when there are more than 3 balls and at the moment when the player's ball (pelota) collides.
...ANSWER
Answered 2021-Feb-20 at 13:06[...] then measures the distance between them, if the distance is less than the ball radius, it is moved away. It seems to work most of the time, but sometimes a ball overlaps. [...]
Of course.You only consider 2 balls when moving a ball away. This means that if you move a ball away from one ball, it can happen that you move it straight onto another ball. You need to check that there is no other ball in the position where you are moving the ball.
Make sure the balls don't overlap as they spawn:
QUESTION
I try to make in python a counter of how many times the arrows on the keyboard have been pressed and show it to me on the screen, I do not try to do anything else so as not to misinterpret it, I want to count how many times the arrows have been pressed because I need it to move accurately some elements in word.
My source:
...ANSWER
Answered 2021-Jan-31 at 22:47from collections import defaultdict
count = defaultdict(int)
def pulsa(tecla):
print('Se ha pulsado la tecla ' + str(tecla))
count[tecla] += 1
QUESTION
When i hit q or r my pieces dont rotate the first time, but after the second touch they work perfect. Can someone tell my how to fix it? I tried to modify some variables but it doesn't work and I dont know why, I think its maybe of the boolean variables, but I am not sure.
The attach of each piece of the game
Here is my code:
...ANSWER
Answered 2021-Jan-27 at 10:29So I fixed by changing this line:
private float rotZ = 0;
I am so fool, sorry for the problems I caused.
QUESTION
Please I need help!
This is my first bash script, and it's calling a python script at some points. But I always get this output at line 28 and 40:
...ANSWER
Answered 2020-Sep-25 at 15:38ogs/tp1 may be there but this is not same as 'logs/tp1/'. You should remove the single quotes.
QUESTION
I'm trying to make a chrome extension to know order typing error, when the user misspells 11 instead of 1 sending an alert, but the script is running in a loop
...ANSWER
Answered 2020-Aug-10 at 14:30You added a new event listener each time you typed
Try this:
QUESTION
I have this code in which I want to obtain the subtraction of a day from the current date, from 0 to -10, but I only correctly obtain the last one that is out of the cycle, any idea why?
...ANSWER
Answered 2020-Aug-02 at 08:17You are not using delayedexpansion which you already enabled, but don't usebackq either as it is not needed.
QUESTION
I have an 1000x1000px image which I want to divide into 10x10 px squares. I have the variable "coordenada" to track the coords of the current 10x10 square (that's why when trying to get the x and y values I multiply by 10).
I want to draw a rectangle surrounding the "current" 10x10 square given by the coords. I get corner 1 (p1) by multiplying the coords by 10 and corner 2 (p2) by doing the same and adding 10. I want the color of the frame to be the same as the color it has in the middle of the square, so I access that color using canvas[x, y], canvas being the name of the image loaded in a numpy array, and typecasting it into a tuple since that is what I read I need to send cv.rectangle. This is the resulting code (minus declaration of canvas and coordenada):
...ANSWER
Answered 2020-Jul-19 at 23:42The error message seems misleading -- it looks like the TypeError stems from colorOfFrame tuple not consisting of int elements (it consists of np.uint8's).
You can avoid the error by explicitly casting pixel values to int. Here is one way to do this:
QUESTION
I have been working on a school project that requires working with double-chained list with struct. I have managed to create the functions that add an integer and a char to the struct. But when I attempt to add the char it wont works, but with the integer, works fine.
I'm working with 3 files, the header.h, function.c, and main.c
main.c file:
ANSWER
Answered 2020-Jun-04 at 20:54An array is passed to a function as a pointer. You are printing the numerical value of the pointer. To print the string, you want to use %s, not %d.
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