Search Results

Search found 9215 results on 369 pages for 'double pointers'.

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

Page 180/369 | < Previous Page | 176 177 178 179 180 181 182 183 184 185 186 187  | Next Page >

  • Is there a better way to declare an empty, typed matrix in MATLAB?

    - by Arthur Ward
    Is there a way to "declare" a variable with a particular user-defined type in MATLAB? zeros() only works for built-in numeric types. The only solution I've come up with involves using repmat() to duplicate a dummy object zero times: arr = repmat(myClass(), [1 0]) Without declaring variables this way, any code which does "arr(end+1) = myClass()" has to include a special case for the default empty matrix which is of type double. Have I missed something a little more sensible?

    Read the article

  • Problem in Union Join For MySQL Query

    - by Mac Taylor
    hey guys i managed to select from a table that saves my latest posts but i need to have double condition in selection here is my code : $sql_query = "SELECT b.*,u.username AS MY_Sender FROM TABLE_users u,TABLE_blogs b Where b.reciever = '0' AND u.user_id = b.sender UNION SELECT b.*,u.username AS MY_reciever FROM TABLE_users u,TABLE_blogs b Where b.reciever != '0' AND u.user_id = b.reciever ORDER BY bid DESC LIMIT 0,7 "; but MY_reciever is Null and empty Am i wrong in using UNION for this need ?!

    Read the article

  • Django save_m2m() and excluded field

    - by jul
    hi, in a ModelForm I replaced a field by excluding it and adding a new one with the same name, as shown below in AddRestaurantForm. When saving the form with the code shown below, I get an error in form.save_m2m() ("Truncated incorrect DOUBLE value"), which seems to be due to the function to attempt to save the tag field, while it is excluded. Is the save_m2m() function supposed to save excluded fields? Is there anything wrong in my code? Thanks Jul (...) new_restaurant = form.save(commit=False) new_restaurant.city = city new_restaurant.save() tags = form.cleaned_data['tag'] if(tags!=''): tags=tags.split(',') for t in tags: tag, created = Tag.objects.get_or_create(name = t.strip()) tag.save() new_restaurant.tag.add(tag) new_restaurant.save() form.save_m2m() models.py class Tag(models.Model): name = models.CharField(max_length=100, unique=True) class Restaurant(models.Model): name = models.CharField(max_length=50) city=models.ForeignKey(City) category=models.ManyToManyField(Category) tag=models.ManyToManyField(Tag, blank=True, null=True) forms.py class AddRestaurantForm(ModelForm): name = forms.CharField(widget=forms.TextInput(attrs=classtext)) city = forms.CharField(widget=forms.TextInput(attrs=classtext), max_length=100) tag = forms.CharField(widget=forms.TextInput(attrs=classtext), required=False) class Meta: model = Restaurant exclude = ('city','tag') Traceback: File "/var/lib/python-support/python2.5/django/core/handlers/base.py" in get_response 92. response = callback(request, *callback_args, **callback_kwargs) File "/home/jul/atable/../atable/resto/views.py" in addRestaurant 498. form.save_m2m() File "/var/lib/python-support/python2.5/django/forms/models.py" in save_m2m 75. f.save_form_data(instance, cleaned_data[f.name]) File "/var/lib/python-support/python2.5/django/db/models/fields/ related.py" in save_form_data 967. setattr(instance, self.attname, data) File "/var/lib/python-support/python2.5/django/db/models/fields/ related.py" in set 627. manager.add(*value) File "/var/lib/python-support/python2.5/django/db/models/fields/ related.py" in add 430. self._add_items(self.source_col_name, self.target_col_name, *objs) File "/var/lib/python-support/python2.5/django/db/models/fields/ related.py" in _add_items 497. [self._pk_val] + list(new_ids)) File "/var/lib/python-support/python2.5/django/db/backends/util.py" in execute 19. return self.cursor.execute(sql, params) File "/var/lib/python-support/python2.5/django/db/backends/mysql/ base.py" in execute 84. return self.cursor.execute(query, args) File "/var/lib/python-support/python2.5/MySQLdb/cursors.py" in execute 168. if not self._defer_warnings: self._warning_check() File "/var/lib/python-support/python2.5/MySQLdb/cursors.py" in _warning_check 82. warn(w[-1], self.Warning, 3) File "/usr/lib/python2.5/warnings.py" in warn 62. globals) File "/usr/lib/python2.5/warnings.py" in warn_explicit 102. raise message Exception Type: Warning at /restaurant/add/ Exception Value: Truncated incorrect DOUBLE value: 'a'

    Read the article

  • Help with SQL query in C#

    - by DanSogaard
    I'm trying to rename the columns. The syntax should be the column name between double quotes incase of two words, like this: SELECT p_Name "Product Name" from items So I'm trying to do it in C# code like this: string sqlqry1 = "SELECT p_Name \"Prodcut Name\" from items"; But I get an error: Syntax error (missing operator) in query expression 'p_Name "Prodcut Name"'. It seems am having somthing wrong with the quotes, but I can't figure out.

    Read the article

  • Floating point numbers in XML

    - by Jamie
    what is the best way to handle floating point numbers in XML? If I have, for instance: double a = 123.456; and I would like to keep it as <A> 123.456 </A> simply using ... myDoc.createTextNode(a.ToString()); is fine? Or should it be done with some Globalization stuff to make it region-independent?

    Read the article

  • easy hex/float conversion

    - by yeus
    I am doing some input/output between a c++ and a python program (only floating point values) python has a nice feature of converting floating point values to hex-numbers and back as you can see in this link: http://docs.python.org/library/stdtypes.html#additional-methods-on-float Is there an easy way in C++ to to something similar? and convert the python output back to C++ double/float? This way I would not have the problem of rounding errors when exchanging data between the two processes... thx for the answers!

    Read the article

  • Why can't c# calculate exact values of mathematical functions

    - by Timo Willemsen
    Hey everyone, Why can't c# do any exact operations. Math.Pow(Math.Sqrt(2.0),2) == 2.0000000000000004 I know how doubles work, I know where the rounding error is from, I know that it's almost the correct value, and I know that you can't store infinite numbers in a finite double. But why isn't there a way that c# can calculate it exactly, while my calculator can do it. Edit It's not about my calculator, I was just giving an example: http://www.wolframalpha.com/input/?i=Sqrt%282.000000000000000000000000000000000000000000000000000000000000000000000000000000001%29%5E2 Cheers

    Read the article

  • arbitrary input from stdin to shell

    - by python_noob
    So I have this existing command that accepts a single argument, but I need something that accepts the argument over stdin instead. A shell script wrapper like the following works, but as I will be allowing untrusted users to pass arbitrary strings on stdin, I'm wondering if there's potential for someone to execute arbitary commands on the shell. #!/bin/sh $CMD "`cat`" Obviously if $CMD has a vulnerability in the way it processes the argument there's nothing I can do, so I'm concerned stuff like this: Somehow allow the user to escape the double quotes and pass input into argument #2 of $CMD Somehow cause another arbitary command to run

    Read the article

  • Visual Studio Default Open File Action

    - by Kleinux
    I am using Visual Studio 2008 with C#. Is there a way to set the default editor for a class file containing a DataTable derived class? Whenever I double click on one of these classes to open the file VS attempts to open a component designer. Since my class isn't compatible with that editor this is a rather useless default. I would like these files to open up in the normal code editor.

    Read the article

  • Silverlight - round doubles away from zero

    - by Cornel
    In Silverlight the Math.Round() method does not contain an overload with 'MidpointRounding' parameter. What is the best approach to round a double away from zero in Silverlight in this case? Example: Math.Round(1.4) = 1 Math.Round(1.5) = 2 Math.Round(1.6) = 2

    Read the article

  • Hiding master view in split view app..???

    - by Mahesh
    Hello friends, I have created split view based ipad app, where master view is table view while Detail view display images.. I need to display the image fit to screen 100% in landscape mode. This could be on button event or double tap event.. Does any one know about it. Thanks in advance.

    Read the article

  • Merging all changesets associated with a WorkItem in Team Foundation Server

    - by Rowland Shaw
    We're trailing the use of the built in bug tracking, and have written some integration into our helpdesk software that allows for escalation via workitems. One thing I haven't found out how to do, is to merge all changes associated with a work item (say to go from dev branch to main) - I appreciate you can double click on a changeset in the merge dialog to view if it is associated with a workitem, and also that I can select individual changesets, and groups of adjacent changesets; but there doesn't appear to be any way to merge changes by workitem?

    Read the article

  • Whats the easiest way to convert a long in C to a char*?

    - by dh82
    What is the clean way to do that in C? wchar_t* ltostr(long value) { int size = string_size_of_long(value); wchar_t *wchar_copy = malloc(value * sizeof(wchar_t)); swprintf(wchar_copy, size, L"%li", self); return wchar_copy; } The solutions I came up so far are all rather ugly, especially allocate_properly_size_whar_t uses double float base math.

    Read the article

  • C++ problem with string stream istringstream

    - by user69514
    I am reading a file in the following format 1001 16000 300 12.50 2002 24000 360 10.50 3003 30000 300 9.50 where the items are: loan id, principal, months, interest rate. I'm not sure what it is that I am doing wrong with my input string stream, but I am not reading the values correctly because only the loan id is read correctly. Everything else is zero. Sorry this is a homework, but I just wanted to know if you could help me identify my error. if( inputstream.is_open() ){ /** print the results **/ cout << fixed << showpoint << setprecision(2); cout << "ID " << "\tPrincipal" << "\tDuration" << "\tInterest" << "\tPayment" <<"\tTotal Payment" << endl; cout << "---------------------------------------------------------------------------------------------" << endl; /** assign line read while we haven't reached end of file **/ string line; istringstream instream; while( inputstream >> line ){ instream.clear(); instream.str(line); /** assing values **/ instream >> loanid >> principal >> duration >> interest; /** compute monthly payment **/ double ratem = interest / 1200.0; double expm = (1.0 + ratem); payment = (ratem * pow(expm, duration) * principal) / (pow(expm, duration) - 1.0); /** computer total payment **/ totalPayment = payment * duration; /** print out calculations **/ cout << loanid << "\t$" << principal <<"\t" << duration << "mo" << "\t" << interest << "\t$" << payment << "\t$" << totalPayment << endl; } }

    Read the article

  • Delphi plugin for pasting text constants in source code?

    - by mjn
    Inserting (pasting from clipboard) of text constants in the Delphi code editor requires some manual "postprocessing" ... split up long text into multiple lines (and insert the string concatenation symbol) escape quotes (replace single quotes with double quotes) enclose the string with quotes keep original white space (leadinng blanks, line feeds) Is there a IDE plugin available which helps to reduce these manual steps?

    Read the article

  • Help with google maps api, user allowed marker map

    - by Exilekiller
    Without telling everyone too much about my new idea for a website, Pretty much I need help, maybe someone can help write it up, with a site that has a simple map that allows any user to double click the map and make a marker. When the marker comes up I just want Title and Description available for edit(only once, so others cant change it). I have been trying to figure this out myself but computer science isnt my major so its killing me. Thanks for the help

    Read the article

  • Can i use a generic implicit or explicit operator? C#

    - by acidzombie24
    How do i change the following statement so it accepts any type instead of long? Now here is the catch, if there is no constructor i dont want it compiling. So if theres a constructor for string, long and double but no bool how do i have this one line work for all of these support types? ATM i just copied pasted it but i wouldnt like doing that if i had 20types (as trivial as the task may be) public static explicit operator MyClass(long v) { return new MyClass(v); }

    Read the article

  • C99 variable length automatic array performance

    - by aaa
    Is there significant cpu/memory overhead associated with using automatic arrays with g++/Intel on 64-bit x86 linux platform? int function(int N) { double array[N]; overhead compared to allocating array before hand (assuming function is called multiple times) overhead compared to using new overhead compared to using malloc The range of N may be from 1kb to 16kb roughly, stack overrun is not a problem.

    Read the article

facebook twitter digg google delicious technorati stumbleupon myspace wordpress linkedin gmail igoogle windows live tumblr viadeo yahoo buzz yahoo mail yahoo bookmarks favorites email print

< Previous Page | 176 177 178 179 180 181 182 183 184 185 186 187  | Next Page >