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  • why is optional chaining required in an if let statement

    - by b-ryan ca
    Why would the Swift compiler expect me to write if let addressNumber = paul.residence?.address?.buildingNumber?.toInt() { } instead of just writing: if let addressNumber = paul.residence.address.buildingNumber.toInt() { } The compiler clearly has the static type information to handle the conditional statement for the first dereference of the optional value and each following value. Why would it not continue to do so for the following statements?

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  • php mysql timestamp

    - by user342391
    I need to track the date and time a user was created in my mysql database. I have column called 'created' and the data type as TIMESTAMP. The problem is that when a user changes their password or other information the TIMESTAMP value changes. How can I set this to not change????

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  • Parsing string logic issue c#

    - by N0xus
    This is a follow on from this question My program is taking in a string that is comprised of two parts: a distance value and an id number respectively. I've split these up and stored them in local variables inside my program. All of the id numbers are stored in a dictionary and are used check the incoming distance value. Though I should note that each string that gets sent into my program from the device is passed along on a single string. The next time my program receives that a signal from a device, it overrides the previous data that was there before. Should the id key coming into my program match one inside my dictionary, then a variable held next to my dictionaries key, should be updated. However, when I run my program, I don't get 6 different values, I only get the same value and they all update at the same time. This is all the code I have written trying to do this: Dictionary<string, string> myDictonary = new Dictionary<string, string>(); string Value1 = ""; string Value2 = ""; string Value3 = ""; string Value4 = ""; string Value5 = ""; string Value6 = ""; void Start() { myDictonary.Add("11111111", Value1); myDictonary.Add("22222222", Value2); myDictonary.Add("33333333", Value3); myDictonary.Add("44444444", Value4); myDictonary.Add("55555555", Value5); myDictonary.Add("66666666", Value6); } private void AppendString(string message) { testMessage = message; string[] messages = message.Split(','); foreach(string w in messages) { if(!message.StartsWith(" ")) outputContent.text += w + "\n"; } messageCount = "RSSI number " + messages[0]; uuidString = "UUID number " + messages[1]; if(myDictonary.ContainsKey(messages[1])) { Value1 = messageCount; Value2 = messageCount; Value3 = messageCount; Value4 = messageCount; Value5 = messageCount; Value6 = messageCount; } } How can I get it so that when programs recives the first key, for example 1111111, it only updates Value1? The information that comes through can be dynamic, so I'd like to avoid harding as much information as I possibly can.

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  • Show div from another website

    - by Joshua Slocum
    Is there a way to use an iframe or some other method of showing a named div from another website? I want to pull in some data from a government website into a google map and when they click the point I want the information from one of the divs on that page to display.

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  • castle dynamic proxy creation

    - by ashish.s
    I am implementing a design where my layer would sit between client and server, and whatever objects i get from server, i would wrap it in a transparent proxy and give to the client, that way i can keep a track of what changed in the object, so when saving it back, i would only send changed information. I looked at castle dynamic proxy, linfu, although they can generate a proxy type, but they cant take existing objects and wrap them instead. Wondering if its possible to do with these frameworks, or if there any other frameworks that enable this...

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  • How can i Put java Scripts at the Bottom of asp.net page?

    - by Hemant Kothiyal
    Hi, In my asp.net page, i am refring external javascript file. As per my learning in web, it's recommended that always put inline java script at the bottom of page. There is no information i get about external javascript refrence I want to know that if i am refing external javascript file then where should i write? Inside top of the page bottom after closing tag of

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  • Disabling Copy/Paste in a Web Page

    - by 1s2a3n4j5e6e7v
    How Do I disable the copy paste feature in my webpage. To be precise, I don't want my users to copy any information from my website and use them for personal purposes. The previous question on the same topic doesn't give enough explanation. The onselect and ondrag aren't working. Please help.

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  • Filename of script that instantiates an object

    - by Calvin L
    In PHP, is it possible to get the file name of the script that instantiated an object? For example I have a script called file.php that creates a new instance of class Class. The class has an Error object that, when triggered, returns some error information. I would like to show that file.php triggered the error.

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  • Wildcard DNS with URI Request

    - by gregavola
    So here is my problem. I want to redirect name.domain.com/trips/1 to domain.com?username=name&trip=1 using modrewrite. Is this possible? I have the dns set up correctly however - I am unsure about the htaccess file. Can I link all this information to one PHP or do I need to create a directory for every user? Thanks for your help.

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  • Modifying text files and executing programs with command line parameters in c# or c++ on Linux

    - by Robert Harvey
    I have a need to create a utility in Suze Linux. The utility will make modifications to some text files, and then use the information in those text files to program a device in the computer using a different executable which accepts command line parameters. I am fluent in c#, but have never worked with Linux. Should I take the time to learn Gnu C++ to do this, or install Mono? How would I execute the programming utility and pass it command line parameters?

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  • Resources for Windows Phone 7 development

    - by geocoin
    Windows Phone 7 has just been unveiled and right now there is no publicly available information to non-privileged developers/partners. MS are announcing all details of the development chain at the Mix10 conference. So until then this could be a good starting point/collection of online resources as they appear EDIT: I've added the speculation tag so we can also accumulate speculation. Please mark speculative posts as such. once firm details are announced we can confirm or delete them

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  • What is AGL on .NET Compact Framework?

    - by SmartJJ
    What is AGL on .NET Compact Framework?? Any information about it would be very appreciated! For Example(Code from .NET Compact Framework): DllImport("AGL", EntryPoint="@106")] public static extern PAL_ERROR Blt(IntPtr howThis, IntPtr howSrc, ref RC rcSrc, ref RC rcDst, int cvKey, AGL_BLT md); public void Save(Stream stream, ImageFormat format) { if (stream == null) { throw new ArgumentNullException("stream"); } if (!stream.CanSeek || !stream.CanWrite) { throw new ArgumentException(); } MISC.HandleAr(GL.SaveImage(this.m_how, format.m_imgfmt, StreamWrapper.CreateStreamCallback(stream))); }

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  • Wordpress loginform

    - by Erik Larsson
    Hello, I have created a loginform that is displayed on the front page. Everything works fine except one thing, if you log in with bad information you get redirected to wp-login.php and the error message pans out there. What i want is so the error message displays at the form on my front page. Is there way of doing this?

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  • Why do you have to mark a class with the attribute [serializable] ?

    - by Blankman
    Seeing as you can convert any document to a byte array and save it to disk, and then rebuild the file to its original form (as long as you have meta data for its filename etc.). Why do you have to mark a class with [Serializable] etc? Is that just the same idea, "meta data" type information so when you cast the object to its class things are mapped properly?

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  • excluding posts in Wordpress

    - by Ayrton
    I wondered how I could exclude posts in Wordpress. E.g. I have a string $exclude_ids (= "4,5,6") or (="-4,-5,-6") and I would like to prevent these posts from showing up. How would I do that? I already tried: query_posts('p=' . $exclude_ids); but that didn't really work out and I didn't really find any information regarding this topic on google. Cheers

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  • Need a good way to store data in a DB from a table on a webpage that can have N columns.

    - by Abe Miessler
    Users need to be able to add a specific type of column to an otherwise static table on my web page and then save the information they enter in there to the database. I've been told that in reality they will almost never go over 5 columns but I would rather support N. The columns will all be of the same datatype. My first thought was to have an XML column with the values from all added columns in there but I was curious if anyone else had come up with a better solution. Suggestions?

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  • Send parameters to Web Service Persian ?

    - by user362813
    Display information in Farsi, but I have a problem when my site for web services can be sent a character "?" are displayed. pages are saved with Unicode(utf-8 with signature)codepage 65001 and the following tags in my master page : <'html xmlns="http://www.w3.org/1999/xhtml" lang="fa" xml:lang="fa" <'meta http-equiv="Content-Type" content="text/xml; charset=utf-8" / <'meta http-equiv="Content-Language" content="fa" / <'body lang="fa"-- and in web.confing : <'globalization fileEncoding="utf-8" requestEncoding="utf-8" responseEncoding="utf-8" /

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