codar | DevChallenge template - Website of a company | Web Site library
kandi X-RAY | codar Summary
kandi X-RAY | codar Summary
Site de uma empresa que desenvolve sites Desafio · Contato.
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QUESTION
The below code perfectly scrapes the data from this website, except a few records which are contained in either broken HTML or are in different tags. Also, the initial letters for some of the names are not appearing, like for Cyclect Electrical Engineering Pte Ltd on this page How can i fix this to have all the names appearing correctly :-
...ANSWER
Answered 2019-Dec-23 at 09:26import requests
from bs4 import BeautifulSoup
import re
for num in range(14, 25):
r = requests.get(f"http://www.asmi.com/index.cfm?GPID={num}")
soup = BeautifulSoup(r.text, 'html.parser')
names = list(dict.fromkeys([' '.join(items.split())
for items in soup(text=re.compile(r'Ltd\s?$'))]))
print(names)
QUESTION
In this example
...ANSWER
Answered 2018-Jun-10 at 13:20Trying to "sync" state to props like you do is extremely error-prone and leads to buggy applications.
In fact even your example with componentWillReceiveProps
has a bug in it.
If you re-render the parent component more often, you will lose user input.
Here is a demo of the bug.
Increment counter, then click “demonstrate bug” and it will blow away the counter. But that button’s setState
should have been completely unrelated.
This shows why trying to sync state to props is a bad idea and should be avoided.
Instead, try one of the following approaches:
You can make your component fully "controlled" by parent props and remove the local state.
Or, you can make your component fully “uncontrolled”, and reset the child state from the parent when necessary by giving the child a different
key
.
Both of these approaches are described in this article on the React blog about avoiding deriving state. The blog post includes detailed examples with demos so I strongly recommend to check it out.
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