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my question and quite simple, what is the best solution.
The context, I have an array that contains several objects.
The 1st solution and the following, is it better to POST only the elements that I need (ie not all the elements)
The 2nd solution, rather post the whole table and make a get to sort the elements that I need
do you have an idea what is the easiest to do?
Thank you Neff
Well your question may seem a little ambiguous. There are a few things to clarify, for example the usage of this POST method. However, here is my solution to my best understanding:
Assuming that the term "best" means the overall optimal option, I believe that you should always use the first solution since it benefits both the user and server. Sending minimal data packets reduces the need of bandwidth, in this case benefiting both the user and server. It also helps the server to get things done quicker, it is rather more beneficial for lightweight processing to be done in order for the server to free up CPU for other operations, i.e. handling more requests.
Though results may vary depending on individual need, this is my overall insight into the topic. Glad to answer your question.
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I'm new to asynchronous programming and I would like to know if using await is considered a bad coding practice. I am asking this because it looks like it is possible to let the callback function do the waiting instead of letting the entire program suspend everythng until the rpocess complete.
Thank you and I appreciate your idea on this.
No, it’s not. It’s just an approach (very useful sometimes).
In modern systems complexity is so high, that in many cases having clear code is much better that having super effective code. Just an example: imagine the case when you need to make several async things one by one (maybe, fetch data based one previously fetched results). You can do it making a chain of several .then(). After that you’ll need to also add .catch(). And at this point you’ll find yourself writing spaghetti code which is a bit messy.
The other option is just make this async function with sequential calls and some logic between them. And this will look much better
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I'm currently studying about web development, I still don't know about jquery, but I've a little knowledge about javascript, html and css (basic).
I've been looking at some examples in github to improve my skills, and I've found this content;
https://github.com/stewilondanga/editables
I perfectly understand the theory, but I do not know how to put it into practice, I would like for any similar examples (simplified alternatives) and how to convert the exported code generated by javascript into a html5 table?
Any example would be appreciated! thanks for your attention!
First of all, jQuery does not generate code. It's a framework, you load it into a web page, and then you can use it from within Javascript code in that page.
I suggest you start by looking at the source of https://stewilondanga.github.io/editables/, if an editable tables is what you need. There are more general frameworks to do this, e.g. Aloha
To try it yourself, I'd suggest you bite the bullet equip yourself with some kind of web server, be it on a server somewhere, or on your local machine, so you can easily try out things like this, copy the sources, alter the code etc.., and quickly hit reload on your browser.
While it may seem easier to run a local server and point your browser at http://localhost/something, IMHO it also takes more tinkering to get browsers to embrace that fully. You don't need the extra grief while already learning all those new concepts. If you want to tackle this seriously, consider getting a hosting service or small VPS somewhere. If you don't know how to do that, get help for that first, but get it out of the way. It'll save you much grief.
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I have a javascript jquery function which I need to use twice, in 2 different files.
Now, the question is, which is the better way to implement it, performance-wise. Should I declare function global using 'window' variable, or should I declare the function in each of the files?
Please keep in mind that traffic is not an issue, the script will be used from the hard-drive.
Thanks for your help.
My answer follows the DRY Principle (Don't Repeat Yourself). If you put the function in both files, and later find a bug on Page #1, someone has to remember that the function is duplicated on Page #2 as well (in this case, assume the bug report says "Page #1 doesn't work properly"). From that bug report, would the developer know to also modify Page #2? To avoid the human error piece, I'd always recommend you don't copy/paste functions into multiple locations.
Performance wise, if you're not concerned about traffic, the difference is nanoseconds slower wrapping it in a shared function as you do have to create an additional stack frame for the shared function call that in turn calls jQuery, but we're really talking nanoseconds. For a few nanoseconds lost, I'd say DRY is the way to go.
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I have more than a million chat records of data in the format of
chat_message
city
timestamp
Now, we need to check for keywords related to travel like "travel" or "accomodation" or "hotels" etc. Let us say we have gathered around 15 keywords related to travel.
Requirement is to mine the chat message related to travel using the keywords. how?
Solution I can think of - Have an array of travel related keywords. Then scan through all the messages for each keyword(some string matching algo).
I think the solution is pretty brute force, any more ideas on a more efficient algo to search, or set up of the chat-records or/and keywords?
You mileage may vary.
If your host language is JavaScript, I recommend you to use some full-text search engine, such as lunrjs.It requires pre-processing your raw data, for example, tokenization, stemming and indexing. And then you can search data more conveniently.
Still, your data set is quite large, at least for browsers(since you are using JavaScript). If you are going to implement this on client side, many details other than algorithm need to be taken into consideration. Memory allocation, data transferring, not to list.
However, if you are on server side, more mature solutions like ElasticSearch worth your consideration.
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I've been working on a project (you should probably see the link to better understand what I am talking about). To make things better, I decided to make a like system.
Each posts contain a like button and a number next to it that indicates how many people liked the post.
Like (4)
The current one in my project is just plain text with an empty link, and the number is a dummy.
Like (4)
Is it possible to actually make the like button actually work? What would I need to use?
I think you need php/SQL to keep track of the votes made. So you need to learn php and SQL or rely on an extension someone else made. If you happen to use one of the more popular CMS's (Joomla/Wordpress) you can probably get it without ever having to worry about the coding.