 They naturally have antibacterial properties on the shells, it's after they've been washed that bacteria can get in through said porous shell. But I do believe it needs an actual hole in order to open in most cases. Most of the times you have a rotten egg in the coop you won't know unless it gets peck or dropped, they don't actually explode. I mean stick it in a microwave or water yeah they'll pop open after awhile, but maybe a car just doesn't get hot ENOUGH to make them pop? But it's sure hot enough to make them rotten and if they dropped or crushed those 😬 rotten eggs are gross.According to the scientist working on the Perseverance mission, the rover has recently collected rocks on the surface of Mars that are “amazing” and will lead us to one day, discover life on Mars.
If you ever heard about the ‘Ingenuity’ helicopter then fine, but if you didn’t, then let us tell you that it’s a small helicopter sent by NASA to Mars along with the ‘Perseverance’ rover. Though its main purpose was to just test the idea of ‘helicopter working on Mars’, unexpectedly it performed so well in all areas that NASA considers replacing rovers with helicopters in the next Mars missions.
The six-wheeled robot Mars rover, Perseverance, will start climbing up an ancient delta structure in the crater where it landed on Tuesday.TL;DR
March Hare 2.0.0.rc5 is released to rubygems.org.
This release is a release candidate of
2.0 that focuses on
usability improvements and bug fixes in automatic connection recovery.
2.0 should be production ready from the stability perspective but has breaking API changes. Please consult the change log to learn about the changes.
Changes Between 2.0.0-rc4 and 2.0.0-rc5
Connection Recovery Improvements
Automatic connection recovery has seen a few bug fixes, most notably channel recovery failures no longer terminate recovery of other channels on the same connection.
Channel recovery is now also performed in ascendant order of channel ID’s, which typically corresponds to the order in which channels were opened.
About the Author
Michael on behalf of the Ruby RabbitMQ Clients TeamAn international research project, part funded by the EU's Fifth Framework Programme (FP5), has developed a computerised prediction system that can forewarn cruise ship pilots of the consequences of a particular manoeuvre more accurately than anything currently on the market.
The SEA-AHED project (simulation environment and advisory system for on-board help, and estimation of manoeuvring performance during design) received 1.7 million euro under the Growth priority of FP5. It brought together six industry and research partners from four EU countries - the UK, Germany, Italy and Poland.
By April, after 39 months of work, the team of researchers had developed a system that is capable of predicting the behaviour of large vessels to within 20 to 30 metres, while also taking account of variables such as mechanical failures, wind speed and currents. This level of accuracy, they claim, far outperforms the industry standard, and the team predicts it will see a 300 per cent return on total research investment through direct sales of the system within five years.
Once the pilot of a large cruise ship commits to a course of action very little can be done to change it, even if they realise that a mistake has been made. Given the potentially disastrous consequences of an error at sea, a real-time computerised system for predicting the outcome of a manoeuvre is an invaluable decision making tool.
As well as making life easier for ships' pilots, the SEA-AHED partners have also created a package that allows shipyards and ship owners to assess the handling capabilities of a vessel at an early stage in its design. A training aid has also been developed that can replay previous manoeuvres and demonstrate the effects that an alternate course of action would have had, based on actual environmental data.
On top of predictions of a tidy profit through sales in the medium term, the team says that cruise ship operators can expect to see a reduction in repair costs of around 5 million euro per ship over a five year period, while shipbuilders could save up to 0.3 million euros per vessel through increased efficiency in the design process.
The benefits delivered by the SEA-AHED project could well be extended to cover bulk carriers, tankers, container ships and ferries, through the development of intelligent cruise control and automated docking systems. Other avenues of research opened up by the project could target obstacle avoidance software for commercial aircraft and intelligent cruise control systems for cars.# Strings 4 - search methods

Browse files online

Strings provide methods to search and trasform them into new strings, but beware: the power is nothing without control! Sometimes you will feel the need to use them, and they might even work with some small example, but often they hide traps you will regret falling into. So whenever you write code with one of these methods, always ask yourself the questions we will stress.

WARNING: ALL string methods ALWAYS generate a NEW string

The original string object is NEVER changed (strings are immutable).

Result

Method

Meaning

str

str.strip(str)

Remove strings from the sides

str

str.lstrip(str)

Remove strings from left side

str

str.rstrip(str)

Remove strings from right side

int

str.count(str)

Count the number of occurrences of a substring

int

str.find(str)

Return the first position of a substring starting from the left

int

str.rfind(str)

Return the first position of a substring starting from the right

str

str.replace(str, str)

Substitute substrings

Note: the list is not exhaustive, here we report only the ones we use in the book. For the full list see Python documentation

## What to do

1. Unzip exercises zip in a folder, you should obtain something like this:

strings
strings1.ipynb
strings1-sol.ipynb
strings2.ipynb
strings2-sol.ipynb
strings3.ipynb
strings3-sol.ipynb
strings4.ipynb
strings4-sol.ipynb
strings5-chal.ipynb
jupman.py


WARNING: to correctly visualize the notebook, it MUST be in an unzipped folder!

1. open Jupyter Notebook from that folder. Two things should open, first a console and then browser. The browser should show a file list: navigate the list and open the notebook strings3.ipynb

2. Go on reading the exercises file, sometimes you will find paragraphs marked Exercises which will ask to write Python commands in the following cells.

Shortcut keys:

• to execute Python code inside a Jupyter cell, press Control + Enter

• to execute Python code inside a Jupyter cell AND select next cell, press Shift + Enter

• to execute Python code inside a Jupyter cell AND a create a new cell aftwerwards, press Alt + Enter

• If the notebooks look stuck, try to select Kernel -> Restart

## strip method

Eliminates white spaces, tabs and linefeeds from the sides of the string. In general, this set of characters is called blanks.

NOTE: it does NOT removes blanks inside string words! It only looks on the sides.

[2]:

x ='\t\n\n\t carpe diem \t '  # we put white space, tab and line feeds at the sides

[3]:

x

[3]:

' \t\n\n\t carpe diem \t  '

[4]:

print(x)



carpe diem

[5]:

len(x)   # remember that special characters like \t and \n occupy 1 character

[5]:

20

[6]:

y = x.strip()

[7]:

y

[7]:

'carpe diem'

[8]:

print(y)

carpe diem

[9]:

len(y)

[9]:

10

[10]:

x      # IMPORTANT: x is still associated to the old string!

[10]:

' \t\n\n\t carpe diem \t  '


### Specificying character to strip

If you only want Python to remove some specific character, you can specify them in parenthesis. Let’s try to specify only one:

[11]:

'salsa'.strip('s')    #  note internal s is not stripped

[11]:

'alsa'


If we specify two or more, Python removes all the characters it can find from the sides

Note the order in which you specify the characters does not matter:

[12]:

'caustic'.strip('aci')

[12]:

'ust'


WARNING: If you specify characters, Python doesn’t try anymore to remove blanks!

