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• Euler rotation of direction vector

  - by Tom Savage

  I have defined an object in 3D space with position, rotation and scale values (all defined as 3D vectors). It also has upwards and forwards direction vectors. When I rotate the object, I need these direction vectors to rotate with it. Assuming my up vector is (0, 1, 0) and my forwards vector is (0, 0, 1) at zero rotation, how might I achieve this?

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• Format TimeSpan in DataGridView column

  - by Dan Neely

  I've seen these questions but both involve methods that aren't available in the CellStyle Format value. I only want to show the hours and minutes portion (16:05); not the seconds as well (16:05:13). I tried forcing the seconds value to zero but still got something like 16:05:00. Short of using a kludge like providing a string or a DateTime (and only showing the hour/minutes part) is there any way I can get the formatting to do what I want.

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• php joomla session lifetime settings

  - by jtanmay

  I have searched through the google and also joomla forums but didn't got what exactly I was looking for. My main purpose is to set the joomla session live for ever. Many forums says its not good to keep a higher value (security issues) but I don't want to consider that right now. My question is : What if I set the session lifetime value to "0" (Zero), will the session be active for ever? or the user will NOT be able to login completely? Thanks, Tanmay

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• Cache in asp.net

  - by newperson

  Cache.Insert("lstDownload", GetListDownload(), null, DateTime.Now.AddDays(1), TimeSpan.Zero); when will cache be exprired? what will we receive when cache expired? http://stackoverflow.com/questions

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• How do you use grep to find terms that are n characters long?

  - by Brian

  I'm using grep to filter the Mac OS X dictionary words file (by default located at /usr/share/dict/words). I want to use grep to retrieve all words four characters long. How do I do this? My best guess for how to do this was: grep [:alpha:]{4} words But that returns zero results.

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• Using LINQ, how do you get all label controls.

  - by John

  I want to get a collection of all label controls that are part of a user control. I have the following code: var labelControls = from Control ctl in this.Controls where ctl.GetType() == typeof(Label) select ctl; but the result is zero results. Please assist. Thanks.

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• How to store opening weekdays in a database

  - by JoaoPedro

  I have a group of checkboxes where the user selects some of the weekdays (the opening days of a store). How can I save the selected days? Should I save something like 0111111 (zero means closed on sunday) on the same field and split the result when reading the data? Or create a field for each day and store 0 or 1 on each (weird)?

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• retrieving same column twice from a table

  - by GJ

  hello all i hav a table named address which has id, title and parent_id fields. in title column the name of regions and districts are inserted. the regions have parent_id zero and parent_id of the districts are id of the regions. i want a query which display regions in one column and its respective districts in another column. hope u guys understand what i mean.. thank u all.

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• Get back original size (height, width) from UIImage load with imageWithData

  - by user325372

  I just cant find useful information from web. I have an UIImage which loaded from sqlLite with method imageWithData(NSData*), I just find the height and width of the size both be zero. I wanna get back the original height and width of the image, is it possible? or I do need to store these information separately in sqllite?

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• Rails, ActiveRecord, how to find foreign rows that are NOT there?

  - by randombits

  The title is a bit difficult to put together for this question. Say I have two models, Foo and Bar. Foo has many Bar's. Bar belongs to one Foo. How do I use Foo.find to find all of the Foos that currently have zero Bars? In SQL this would translate into something like: SELECT * from foo where id NOT IN (select foo_id from bar);

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• storing characters in char data type C language

  - by iSight

  Hi, I can store string of few length in char data type. But when it exceeds its capacity what can be the alternative way to store string. I am using char data type. void setString(char* inPoints) { if (strcmp(mPoints, inPoints)!= ZERO) { if (mPoints) { free(mPoints); } mPoints = (char*)malloc((strlen(inPoints) + 1) * sizeof(char)); strcpy(mPoints, inPoints); } }

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• How do I remove separation between rows in a HTML table?

  - by Roman

  I have a html table with 3 rows and 1 column. In the top and button row I have images and in the middle row I have div. Between my rows I see a separation (I see background of my page). I tried to set all padding and margins to zero (for tables, div and images) and I still have this separation. Can anybody, please, help me to solve this problem. The page is here:

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• matlab: subs on symbolic constant returns scalar instead of vector for a vector input

  - by noam

  usually, symbolic functions return vectors for vector inputs: syms('x'); f=x*2; subs(f,[1 2 3]) outputs: [2 4 6] but doing f=sym('0'); subs(f,[1 2 3]); outputs: 0 and not: [0 0 0] so basically, my questions is how do I make f behave as a "normal" symbolic function. I can do something ugly like f=x-x to create a function that always returns zero, but is there a prettier way?

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• NZEC in spoj FACKT

  - by frodo

  I was trying to solve this problem http://www.spoj.pl/problems/FACKT/, and I keep getting a Non-Zero Exit Code (NZEC). How exactly do I figure out what to change in the code to overcome this? Here is the code import math import sys def cal_num(n): i = 1 f = 1 while f<n: f *= i i = i + 1 return i-1 while 1: line = sys.stdin.readline() if line == "": break n = int(line) x = cal_num(n) y = math.factorial(2*x) l = int(math.ceil(math.log(y,10))) print (x,l) Any suggestion would be welcome.

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• Have macro 'return' a value

  - by bobobobo

  I'm using a macro and I think it works fine - #define CStrNullLastNL(str) {char* nl=strrchr(str,'\n'); if(nl){*nl=0;}} So it works to zero out the last newline in a string, really its used to chop off the linebreak when it gets left on by fgets. So, I'm wondering if I can "return" a value from the macro, so it can be called like func( CStrNullLastNL( cstr ) ) ; Or will I have to write a function

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• what is the value of NULL in sqlserver ?

  - by Anish

  Hi, I know NULL is not zero...nor it is empty string.But then what is the value of NULL...which the system keeps, to identify it?

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• Calculate QuaterlyHour from Given two DateTimes in c#

  - by user281947

  I want to calculate the quarter Hour from the given two datetimes: Suppose datetime1 and datetime2 , i am doing somewhat like this : int d = datetime2.Subtract(datetime1).Hours; double l = Math.Round(Convert.ToDouble(d/4)); but if the QuarterHour is 3 (ie d=3), whats the good way to show the output- should it be zero or the round one : 3/4 = 0.75. so should i round up to 1 or 0 is ok. And if round up to 1..how should i?

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• How to encode a 8 byte block using only digits (numeric characters)?

  - by Hemant

  I need to encode streams of 8 byte such that encoded stream has only digits (zero to nine) in them. Are their any standard encoding mechanism for doing this? If there are multiple ways to do it, which one is efficient in terms of length of encoded string (shorter is better)?

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• How to parse a string to an int in C++?

  - by eed3si9n

  What's the C++ way of parsing a string (given as char *) into an int? Robust and clear error handling is a plus (instead of returning zero).

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• MySQL: NOW() giving me zeros

  - by Tunji Gbadamosi

  I have a table which I want to record the timestamp of every order at every insertion time. However, I'm getting zero values for the timestamps. Here's my schema: CREATE TABLE IF NOT EXISTS orders( order_no VARCHAR(16) NOT NULL, volunteer_id VARCHAR(16) NOT NULL, date TIMESTAMP DEFAULT NOW(), PRIMARY KEY (order_no), FOREIGN KEY (volunteer_id) REFERENCES volunteer(id) ON UPDATE CASCADE ON DELETE CASCADE)

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• please help me to solve problem

  - by davit-datuashvili

  hi everybody fisrt of all this is not homework and now question is like this suppose i have array int a[]=new int[]{0xBCDA,0xABFE,0xBCAD,0xEFCA,0xFFCA} i know that there is always some hexadecimal number which occurs in all number or in this case A is repeat in array everywhere so my aim is print only repeat number and other numbers should be zero so my new array should be like this 0x000A, 0xA000,0x00A0 0x000A,0x000A any idea please help me? p.s please nobody say that this is homework

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• Subscript out of bounds on a which statement in R

  - by ahandler

  I have data that looks like this: > head(newdata) zero one real 601 0.01273885 0.9872611 1 602 0.01273885 0.3242234 1 I want to select records where one is greater than .5 When I try this, I get "subscript out of bounds." Why am I getting this error? How do I perform this select? newDataGoodPredict <- newdata[ which(one0.5),] Error in newdata[which(one 0.5), ] : subscript out of bounds

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• check if a value is NULL or Less than 0 in one TSQL statement

  - by Name.IsNullOrEmpty

  ISNULL(SUM(MyTable.Total), 0) AS Total how can i modify the above statement to also check if Total is less than 0 (zero), such that if Total is NULL or less than 0 (negative), i assign 0 to Total

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• Function composition Clojure?

  - by StackedCrooked

  Can Clojure implement (g ° f) constructions like Haskell's g . f? I'm currently using workarounds like (fn [n] (not (zero? n))), which isn't nearly as nice :)

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• if `int != 1` or `int == 0`?

  - by Emil

  Hey. I was coding here the other day, writing a couple of if statements with ints that are always either zero or one (~bools), and I asked myself: Should I use if (int == 1) or if (int != 0) ? Is there any difference at all? Please, don't answer with stuff regarding the int may being more/less than 1/0, that's not what I want to know.

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