Is there any way to receive data from my parse server thing. I have a column in my parse called lastmsg, and is their a way to "download" data from the column and use it in a string in Xcode?
You need to make a PFQuery, you can find the corresponding doc here
I strongly suggest you keep that link close, there is all the needed information there, and you can find anything in the left column (how to use PFObjects, Queries, and so on).
It should be pretty straightforward if you follow their lead. Ask a question if you need further help with a more precise matter.
Related
I'm posting as a new learner to java. Currently now i'm in the process of learning reading and writing to files and also sorting and displaying specific information from files.
I hope someone can help me understand what im doing wrong. i have too much code to post here so i uploaded it to github. https://github.com/PearseMorris/AstronautList.git
If you look at the StartApp.java it contains the main method, Astronaut.java is OOP getters and setters etc. and there is astronauts.csv. the file that i need to pull information from.
I want to be able to specifically pull names from the csv file if they are from a specific country. so in my case (Case 2 switch statement/StartApp.java), i want to beable to display all astronaut names that are from the 'USA'. I've already wrote a few methods at the bottom of StartApp.java thats suppose to sort and store those names in an array. and then on case 2 they display those names. if that makes sense.
This forum is my last resort as i am not getting replies from my teachers. But any and all help is really appreciated!
I have tried so many options, over many days to try and extract data. I don't know where I am going wrong.
for example, I am on the website reviewcentre.com and am looking at car selling site reviews.
I am struggling badly to retrieve information, most of my xpaths appear incorrect.
Where can I best learn how to do this properly, I have spent days at this.
https://www.reviewcentre.com/car_dealers/we_buy_any_car_-_wwwwebuyanycarcom-review_14068020
I know how to copy xpaths, but when it comes to rapidminer, I can't extract the data.
I know I am doing it wrong, but I don't know what's right unfortunately.
examples include
//*[#id="ReviewTitle-14068020"]
h:html/h:head/h:title/text()
this one works!
//*[#id="ReviewBox-14068020"]/div[1]/div[2]/p[2]/span
I have no problem it appears retrieving the xpath from the website, but using it for extracting data on rapidminer is not working at all..Would really appreciate if anyone can point me in the right direction.
Obviously, you don't want to use unique IDs in your xpaths.
Make sure you have understood the concept of xml namespaces, too.
I have the following problem:
I want to avoid that one field of the copied row gets copied into the new row. (ME51n)
I thought that I could search somewhere in the debugger for this field name.
Example:
first row has the MATNR: 100-1-15
now i want to search in the debugger for the field MATNR. Is this possible?
(I know this example does not make sense, but my field is not used that often because it's an self-created field)
Or is there an user-exit especially for that?
Use watchpoints for that particular aim that you stated. In official documentation you can learn how to do it. The problem of finding suitable user-exit is not related to original question.
See the screenshot here:
I'd like the user to just type a city or country name and the autocompleter will show suggested items.
How should I start for creating it?
Are there any API(s) or web services for me to call?
Where can I find the database of all cities/countries in the world?
I think this would be the best database for your situation, check it out:
http://www.geodatasource.com/cities-free.html
You first need a autocomplete plugin.
I recommend to use the jQuery-Ui Auto Complete Plugin.
The database could as example be this, but eventually try to search a bit for yourself.
There was already a question on stackoverflow about a database for cities of the world.
A simple text file with all cities may also be this.
There are very much of those libraries, but you have to chose the right one for you.
My solution may not be the best, but it's a starting point:
Google a list with all countries (ISO-Standard), paste it into a txt-file. Then you can simply read that file with PHP an create a select menu with the contents of the file.
It does not incorporate the cities, but maybe it helps you in some way.
I have a list of airport names and my users have the possibility to enter one airport name to select it for futher processing.
How would you handle misspelled names and present a list of suggestions?
Look up Levenshtein distances to match a correct name against a given user input.
http://norvig.com/spell-correct.html
does something like levenshtein but, because he doesnt go all the way, its more efficient
Employ spell check in your code. The list of words should contain only correct spellings of airports.
This is not a great way to do this. You should either go for a control that provides auto complete option or a drop down as someone else suggested.
Use AJAX if your technology supports.
I know its not what you asked, but if this is an application where getting the right airport is important (e.g. booking tickets) then you might want to have a confirmation stage to make sure you have the right one. There have been cases of people getting tickets for the wrong Sydney, for instance.
It may be better to let the user select from the list of airport names instead of letting them type in their own. No mistakes can be made that way.
While it won't help right away, you could keep track of typos, and see which name they finally enter when a correct name is entered. That way you can track most common typos, and offer the best options.
Adding to Kevin's suggestion, it might be a best of both worlds if you use an input box with javascript autocomplete. such as jquery autocomplete
edit: danish beat me :(
There may be an existing spell-check library you can use. The code to do this sort of thing well is non-trivial. If you do want to write this yourself, you might want to look at dictionary trie's.
One method that may work is to just generate a huge list of possible error words and their corrections (here's an implementation in Python), which you could cache for greater performance.