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How to debug Ruby scripts [closed]
...Advice
When you are trying to debug a problem, good advice is to always: Read The !@#$ing Error Message (RTFM)
That means reading error messages carefully and completely before acting so that you understand what it's trying to tell you. When you debug, ask the following mental questions, in thi...
What is the use of ByteBuffer in Java? [closed]
...ava 7 documentation:
Absolute and relative get and put methods that read and write single bytes;
Relative bulk get methods that transfer contiguous sequences of bytes from this buffer into an array;
Relative bulk put methods that transfer contiguous sequences of bytes from a byte array or...
HTTP error 403 in Python 3 Web Scraping
...mp;group=1', headers={'User-Agent': 'Mozilla/5.0'})
webpage = urlopen(req).read()
This works for me.
By the way, in your code you are missing the () after .read in the urlopen line, but I think that it's a typo.
TIP: since this is exercise, choose a different, non restrictive site. Maybe they ar...
Writing a dict to txt file and reading it back?
I am trying to write a dictionary to a txt file. Then read the dict values by typing the keys with raw_input . I feel like I am just missing one step but I have been looking for a while now.
...
What is “android:allowBackup”?
...cation data off of the device. Once backed up, all application data can be read by the user. adb restore allows creation of application data from a source specified by the user. Following a restore, applications should not assume that the data, file permissions, and directory permissions were create...
Python: How would you save a simple settings/config file?
... 3.x
from configparser import ConfigParser
config = ConfigParser()
config.read('config.ini')
config.add_section('main')
config.set('main', 'key1', 'value1')
config.set('main', 'key2', 'value2')
config.set('main', 'key3', 'value3')
with open('config.ini', 'w') as f:
config.write(f)
The file f...
MySQL vs MongoDB 1000 reads
... (the actual binary json document)
So a b-tree lookup, and a binary page read. Log(n) + 1 IOs. If the indexes can reside entirely in memory, then 1 IO.
In MySQL with 20 tables, you have to perform:
One index lookup on the root table (again, assuming the entity is fetched by id)
With a clustered...
Redirect STDERR / STDOUT of a process AFTER it's been started, using command line?
....
This GDB was configured as "x86_64-linux-gnu".
Attaching to process 5636
Reading symbols from /usr/bin/tail...(no debugging symbols found)...done.
Reading symbols from /lib/librt.so.1...(no debugging symbols found)...done.
Loaded symbols for /lib/librt.so.1
Reading symbols from /lib/libc.so.6...(n...
Effect of NOLOCK hint in SELECT statements
...on't care what state it is in, and don't bother holding it still while you read from it. It is all at once faster, less resource-intensive, and very very dangerous.
You should be warned to never do an update from or perform anything system critical, or where absolute correctness is required using ...
How do I read any request header in PHP
How should I read any header in PHP?
15 Answers
15
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