c++ - How to help the compiler deduce template parameter? -

-

मेरे पास यह विधि है: 

  टेम्पलेट & lt; typename type & gt; स्थिर QList & lt; प्रकार & gt; ComboListToItemsList (QList & lt; QList & lt; QVariant & gt; & gt; और amp; comboList) {QList & lt; प्रकार & gt; itemsList; यदि (कॉम्बोलिस्ट.लैम्थ ()> gt; 0) {foreach (QList & lt; QVariant & gt; dbItem, कॉम्बोलिस्ट) {प्रकार आइटम (dbItem); itemsList.append (आइटम); }} वापसी आइटम सूची; }

और जब मैं इसे कॉल करता हूं: 

  QList & lt; SettingItem & gt; SettingItems = (QList & lt; SettingItem & gt;) DatabaseManager :: comboListToItemsList (परिणाम.पहले);

यह चला जाता है "टेम्प्लेट पैरामीटर टाइप नहीं निकाल सकता"। 

  (QList & lt; SettingItem & gt;)

को जोड़कर कैसे मैंने पहले से ही किया है? मेरे पास उप-वर्गों के नाम हैं जिनके लिए विधि बनाई गई है लेकिन वास्तव में इसका पता नहीं है कि इसका उपयोग कैसे करना है ...

इसे केवल एक टेम्पलेट तर्क के रूप में निर्दिष्ट करें, जैसा कि @ क्रिस ने कहा है। 

  QList & lt; SettingItem & gt; SettingItems = डेटाबेस प्रबंधक :: comboListToItemsList & lt; SettingItem & gt; (परिणाम। पहले);

Comments

Post a Comment

Popular posts from this blog

java - org.apache.http.ProtocolException: Target host is not specified -

-
I have written a simple httprequest / response code and I am getting this error below: I used to type in my classpath httpclient, httpcore, common -Codecs and general logging. I am very new to Java and I do not know what's going on here. Please help me. code: import org.apache.http.client.HttpClient; Import org.apache.http.client.methods.HttpGet; Import org.apache.http.HttpResponse; Import org.apache.http.impl.client.HttpClientBuilder; Import org.apache.http.Header; Import org.apache.http.HttpHeaders; Public class UnshorteningUrl {public static zero main (string [] args throws exception {HttpGet request = zero; HTTP Client Client = HTTP ClientBuilder.credit (). Build (); Try {Request = New HTTP Gate ("trib.me/1lBFzSi"); HttpResponse httpResponse = client.execute (request); Header [] header = httpResponse.getHeaders (HttpHeaders.LOCATION); // Preconditions.checkState (headers.length == 1); String new url = header [0] .getValue (); System.out.println ("new url...
Read more

Python Gstreamer for Lion -

-
I am working on a Kiwi project, and I want to be able to play it video, but I have been Gstreamer To set up I have to face a terrible time. I tried the brew install gst-python , but I get the following message, which is quite meaningless for me. brew install gst-python == & gt; GST-Python Dependency Installation: pygtk == & gt; Http://ftp.acc.umu.se/pub/GNOME/sources/pygtk/2.24/pygtk- Downloading- Pre-Downloaded: / Library / Catches / Homebrew /pygtk-2.24.0.tar .bz2 == & gt; Checking for .configure --prefix = / usr / local / cellar / pygtk / 2.24.0 pkg-config ... no GLIB - version & gt; = 2.8.0 ... No *** A new enough version of Pkg-config was not found. *** Configure http://www.freedesktop.org/software/pkgconfig/: Error: Need a gobject to create pygtk? Based on the site, I have to clone a repository, but is there a specific place in which the repository is needed? Is there an easy way to get Gstreamer, like PIP, or do I have to do all this to get it? This...
Read more

c# - Chart control: Design messed Up after clearing and re-adding Y-Values -

-
Image
The day was struggling with this. I have three series on a chart that looks like this. Note: I am using vanof control. They are being added on the basis of input from the calculation. I am using this code to add value to each series. this.chart1.Series ["green"]. Points. AddY (greenvalue); This.chart1.Series ["totalsaving"] Points.AddY (totalsavingvalue). This.chart1.Series ["blue"] Points.AddY (bluevalue). I have set series properties like this. Both green and totalsaving are set to StackedColumn, the blue chart is set to the column for type. I started then To do is a button that brings the user back to the input field and then I am using this code to clear the series values ​​on the start code. chart 1. Series ["totaling"]. Points. clear (); Chart1.Series ["green"] Points.Clear () .; Chart1.Series ["blue"] Points.Clear () .; The same calculation click above is being calculated for the calculation of th...
Read more