nassau | Fast Nasdaq transport protocol library for the JVM | Networking library
kandi X-RAY | nassau Summary
kandi X-RAY | nassau Summary
Nassau implements NASDAQ transport protocols on the JVM. You can use Nassau to connect to Nasdaq and other network endpoints that use NASDAQ transport protocols. You can also use it to provide your own services using these protocols. Nassau is designed to exhibit low and predictable latency. To achieve this, it supports non-blocking, zero-copy networking and does not allocate any memory on message reception or transmission. The SoupBinTCP implementation can achieve 4.8 µs round-trip time (RTT) over the loopback interface. Nassau requires Java Runtime Environment (JRE) 8 or newer.
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Top functions reviewed by kandi - BETA
- Receive messages from the given socket
- Parses the incoming packet
- Send a packet
- Receive data from the underlying channel
- Receive messages from a multicast group
- Handles incoming message
- Issues a request from the given sequence number
- Reads a message
- Store a message
- Apply a message listener to the stream
- Create a session identifier
- Accepts the server
- Send a login rejected packet
- Fires a request
- Process incoming packet
- Read a message from the buffer
- Creates a new datagram client
- Handler methods
- Adds a message to the stream
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Community Discussions
Trending Discussions on nassau
QUESTION
I have two large-ish data frames I am trying to append...
In df1, I have state codes, county codes, state names (Alabama, Alaska, etc.), county names, and years from 2010:2020.
In df2, I have county names, state abbreviations (AL, AK), and data for the year 2010 (which I am trying to merge into df1. The issue lies in that without specifying the state name and simply merging df1 and df2, some of the data which I am trying to get into df1 is duplicated due to there being some counties with the same name...hence, I am trying to also join by state to prevent this, but I have state abbreviations, and state names.
Is there any way in which I can make either the state names in df1 abbreviations, or the state names in df2 full names? Please let me know! Thank you for the help.
Edit: dput(df2)
...ANSWER
Answered 2022-Apr-18 at 03:52Here's one way you could turn state abbreviations into state names using R's built in state vectors:
QUESTION
Any ideas why I get a connection error when trying to run a redis command from one container to another? I'm trying to run an old python 2.7 lambda locally in order to test before upgrading to 3.8.10 I'm running a script that builds and links redisdb container with my_app container:
...ANSWER
Answered 2021-Jul-09 at 14:43Your python app is trying to talk to Redis on localhost but the Redis container is on a different localhost.
You should be able to use the link configured in the docker run ...
command, i.e redisdb
, for the host
option.
QUESTION
I'm using Moment JS, and have just recently outputted the timezones listed using this.$moment.tz.names()
in my Nuxt JS project. However, the timezones that my server has inside of the timezone_identifiers_list
function in PHP seems to be about 100 or so less, and weirdly, it seems that some important ones are either missing from PHP, or not meant to be in Moment, such as:
US/Central
Why would PHP not contain these missing timezones from Moment?
I'll attach a screenshot of the ones that appear to be outputted from Moment that aren't in PHP, wondering how I can get these timezones into that PHP list?
I've outputted the list of timezones from PHP into a string, because I'm going to have to compare the moment ones then and set a default if my timezone guess logic picks one that doesn't exist since I have a Laravel validation rule for timezone.
...ANSWER
Answered 2021-Apr-04 at 14:09There's a thing called tz, zoneinfo, or the Olson database. It's maintained by the Internet Assigned Numbers Authority
It names zones in Continent/City
or sometimes Continent/State/City
format, like Asia/Kolkata
or America/Indiana/Knox
. Each named zone contains rules for converting to and from UTC time to local time, including the correct handling of summer time.
The database contains the temporopolitical history of time zone and summer time changeovers for the city (and surrounding regions). So, if the government of, say, Knox Indiana USA, changes the summer time rules next year, their entry gets updated in a maintenance release of the database.
If Spain decides to repudiate its Franco-era decision to use the same time zone as 'Europe/Berlin', and move to the same zone as 'Europe/Lisbon', the updated zoneinfo data for 'Europe/Madrid' will reflect that change on its effective date. Updates to UNIX-based operating systems like Linux and MacOS include the most recent zoneinfo data.
php uses zoneinfo. So does MySql. moment.js adds synonyms to it. If somebody in Knox sets their time zone to moment's synonym 'US/Central' and the city council the changes the rules, they won't follow the change.
So, please consider using php's list in your application, because it's proven so far to be future-proof.
QUESTION
I am new to this I am trying to use a for/in loop with my code. I have a code that works but I would like it to work in a for/in loop.
This is the source:
...ANSWER
Answered 2021-Mar-03 at 20:22The for
loop version of the list comprehension would be
QUESTION
I am trying to match capital cities that contain three consecutive vowels.
I tried this method with this code. It works if I don't have any commas.
...ANSWER
Answered 2021-Feb-28 at 03:09Try this:
QUESTION
I'm new to the lat & long stuff. I found a Haversine Function that looks interesting. I have two data frames that I am trying to feed into the function, but I'm getting an error.
Here's the function.
...ANSWER
Answered 2021-Feb-21 at 05:06It's because you are passing the series data, instead, you need to pass single values..
QUESTION
I am trying to compare lat & long coordinates in two data frames. If the difference in latitude_fuze is < .01 latitude_air and if the difference in longitude_fuze is < .01 longitude_air, then I want to update the field df_result['Type'] to read 'Airport'. Basically, I have a DF with airport lat & long coordinates, and if these coordinates are very similar to the lat & long coordinates that I have in my business DF, I want to add a flag to the business DF to indicate that this is an airport.
Here is the code that I am testing.
...ANSWER
Answered 2021-Feb-19 at 18:17I'm not sure what approach you need to take, as I'm not 100% clear on what you're trying to do. However, something like this might be helpful for getting your current approach working:
QUESTION
country_list= ['Afghanistan', 'Albania', 'Algeria', 'Andorra', 'Angola', 'Antigua and Barbuda', 'Argentina', 'Armenia', 'Australia', 'Austria', 'Austrian Empire', 'Azerbaijan', 'Baden*', 'Bahamas', 'Bahrain', 'Bangladesh', 'Barbados', 'Bavaria*', 'Belarus', 'Belgium', 'Belize', 'Benin', 'Bolivia', 'Bosnia and Herzegovina', 'Botswana', 'Brazil', 'Brunei', 'Brunswick', 'Bulgaria', 'Burkina Faso', 'Burma', 'Burundi', 'Cabo Verde', 'Cambodia', 'Cameroon', 'Canada', 'Cayman Islands, The', 'Central African Republic', 'Central American Federation*', 'Chad', 'Chile', 'China', 'Colombia', 'Comoros', 'Congo Free State', 'Costa Rica', 'Ivory Coast', 'Croatia', 'Cuba', 'Cyprus', 'Czechia', 'Czechoslovakia', 'Democratic Republic of the Congo', 'Denmark', 'Djibouti', 'Dominica', 'Dominican Republic', 'Duchy of Parma, The*', 'East Germany (German Democratic Republic)', 'Ecuador', 'Egypt', 'El Salvador', 'Equatorial Guinea', 'Eritrea', 'Estonia', 'Eswatini', 'Ethiopia', 'Federal Government of Germany (1848-49)*', 'Fiji', 'Finland', 'France', 'Gabon', 'Gambia, The', 'Georgia', 'Germany', 'Ghana', 'Grand Duchy of Tuscany', 'Greece', 'Grenada', 'Guatemala', 'Guinea', 'Guinea-Bissau', 'Guyana', 'Haiti', 'Hanover*', 'Hanseatic Republics*', 'Hawaii*', 'Hesse*', 'Holy See', 'Honduras', 'Hungary', 'Iceland', 'India', 'Indonesia', 'Iran', 'Iraq', 'Ireland', 'Israel', 'Italy', 'Jamaica', 'Japan', 'Jordan', 'Kazakhstan', 'Kenya', 'Kingdom of Serbia/Yugoslavia*', 'Kiribati', 'Korea', 'Kosovo', 'Kuwait', 'Kyrgyzstan', 'Laos', 'Latvia', 'Lebanon', 'Lesotho', 'Lew Chew (Loochoo)*', 'Liberia', 'Libya', 'Liechtenstein', 'Lithuania', 'Luxembourg', 'Madagascar', 'Malawi', 'Malaysia', 'Maldives', 'Mali', 'Malta', 'Marshall Islands', 'Mauritania', 'Mauritius', 'Mecklenburg-Schwerin*', 'Mecklenburg-Strelitz*', 'Mexico', 'Micronesia', 'Moldova', 'Monaco', 'Mongolia', 'Montenegro', 'Morocco', 'Mozambique', 'Namibia', 'Nassau*', 'Nauru', 'Nepal', 'Netherlands, The', 'New Zealand', 'Nicaragua', 'Niger', 'Nigeria', 'North German Confederation*', 'North German Union*', 'North Macedonia', 'Norway', 'Oldenburg*', 'Oman', 'Orange Free State*', 'Pakistan', 'Palau', 'Panama', 'Papal States*', 'Papua New Guinea', 'Paraguay', 'Peru', 'Philippines', 'Piedmont-Sardinia*', 'Poland', 'Portugal', 'Qatar', 'Republic of Genoa*', 'Republic of Korea (South Korea)', 'Republic of the Congo', 'Romania', 'Russia', 'Rwanda', 'Saint Kitts and Nevis', 'Saint Lucia', 'Saint Vincent and the Grenadines', 'Samoa', 'San Marino', 'Sao Tome and Principe', 'Saudi Arabia', 'Schaumburg-Lippe*', 'Senegal', 'Serbia', 'Seychelles', 'Sierra Leone', 'Singapore', 'Slovakia', 'Slovenia', 'Solomon Islands, The', 'Somalia', 'South Africa', 'South Sudan', 'Spain', 'Sri Lanka', 'Sudan', 'Suriname', 'Sweden', 'Switzerland', 'Syria', 'Tajikistan', 'Tanzania', 'Texas*', 'Thailand', 'Timor-Leste', 'Togo', 'Tonga', 'Trinidad and Tobago', 'Tunisia', 'Turkey', 'Turkmenistan', 'Tuvalu', 'Two Sicilies*', 'Uganda', 'Ukraine', 'Union of Soviet Socialist Republics*', 'United Arab Emirates, The', 'United Kingdom', 'Uruguay', 'Uzbekistan', 'Vanuatu', 'Venezuela', 'Vietnam', 'Yemen', 'Zambia', 'Zimbabwe']
...ANSWER
Answered 2020-Sep-19 at 06:34Use sorted()
with key=len
:
QUESTION
I've been using Pandas to convert a .CSV file into a format that's readable on another system and I'm close to finishing it, but I just can't get it to work with timezones that are negative (UTC-1, -2 etc)
Here is the code I'm using, it's not the tidiest, but it gets the job done for UTC+ timezones, can you see why it might not be handling UTC- timezones correctly?
...ANSWER
Answered 2020-Aug-29 at 01:03Your "minus" signs are not all minus signs. For example in your error message:
QUESTION
I have a list of lists (of lists of lists...it's lists all the way down) called geos
with geolocation information for U.S. cities returned by the Google Maps API using the geocode()
function in ggmaps
(see dput
at the bottom of this question for a representative sample of data on 10 cities).
I would now like to use bits of this list to populate a data frame with one row per location, i.e., per element of the vector of locations used in the API query. For argument's sake, let's say I wanted the resulting data frame to include columns for locality
, administrative_area_level_2
(county), and administrative_area_level_1
(state), using long names for the first two and the short name for the last. Here's how the desired result would look.
ANSWER
Answered 2020-Jul-28 at 14:18You could do: There are many more columns
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