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• Selecting rows from DataTable by DateTime column (hours)

  - by nCdy

  DatarowsForOneDay = dt.Select( dt.Columns[0].Caption + "='" + x.ToString("dd/MM/yyyy HH") + "'"); doesn't work, but DatarowsForOneDay = dt.Select( dt.Columns[0].Caption + "='" + x.ToString("dd/MM/yyyy") + "'"); works. So how can I select the date with a same hour? Variable x type is DateTime.

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• Is VBA Type Safe?

  - by Mary-Chan

  It doesn't seem to be. Is that why people still prefix the datatype to variable names in VBA?

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• Cocoa: what is the var name of an instance created by a NIB file?

  - by Nibbles

  When a Cocoa NIB file instantiates an instance of a custom controller object, what is the name of the variable that that custom controller instance is assigned to? In case that isn't clear, if you manually created an instance of that class you would do: MyControllerClass *myVar = [[MyControllerClass alloc] init]; What equivalent of "myVar" has the NIB used when doing this behind the scenes?

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• How many indexes will actually get used?

  - by Ender

  I'm writing a page that does very simple search queries, resulting in something like: SELECT * FROM my_table WHERE A in (a1, a2, a3) AND B in (b1, b2) AND C in (c1, c2, c3, c4) AND And so on for a variable number of columns, usually ~5. If I create a separate index for each column (one for A, one for B, one for C, not (A,B,C)), will all of them be used in the above query?

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• String replacment in batch file

  - by Faisal

  We can replace strings in a batch file using the following command set str="jump over the chair" set str=%str:chair=table% These lines work fine and change the string "jump over the chair" to "jump over the table". Now I want to replace the word "chair" in the string with some variable and I don't know how to do it. set word=table set str="jump over the chair" ?? Any ideas?

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• How to remove unwanted charecters using split in tcl

  - by Mallikarjunarao

  Here is an example Interface {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} IP-Address {} {} {} {} {} OK? Method Status {} {} {} {} {} {} {} {} {} {} {} {} {} {} {} {Protocol FastEthernet0/0} {} {} {} {} {} {} {} {} {} {} {} unassigned {} {} {} {} {} YES unset {} administratively down down {} {} {} { FastEthernet0/1} {} {} {} {} {} {} {} {} {} {} {} unassigned {} {} {} {} {} YES unset {} administratively down down I want remove {} in this. I assumed all the above string interface variable set interface [string trimright [string trimleft $interface "{}"] "{}"] but it doesn't work. How to remove the {} in my example?

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• Should we use temporary variables for the returned values of functions?

  - by totymedli

  I thought about this: Is there a performance difference in these two practices: Store the return value of a function in a temporary variable than give that variable as a parameter to another function. Put the function into the other function. Specification Assuming all classes and functions are written correctly. Case 1. ClassA a = function1(); ClassB b = function2(a); function3(b); Case 2. function3(function2(function1())); I know there aren't a big difference with only one run, but supposed that we could run this a lot of times in a loop, I created some tests. Test #include <iostream> #include <ctime> #include <math.h> using namespace std; int main() { clock_t start = clock(); clock_t ends = clock(); // Case 1. start = clock(); for (int i=0; i<10000000; i++) { double a = cos(1); double b = pow(a, 2); sqrt(b); } ends = clock(); cout << (double) (ends - start) / CLOCKS_PER_SEC << endl; // Case 2. start = clock(); for (int i=0; i<10000000; i++) sqrt(pow(cos(1),2)); ends = clock(); cout << (double) (ends - start) / CLOCKS_PER_SEC << endl; return 0; } Results Case 1 = 6.375 Case 2 = 0.031 Why is the first one is much slower, and if the second one is faster why dont we always write code that way? Anyway does the second pratice has a name? I also wondered what happens if I create the variables outside the for loop in the first case, but the result was the same. Why?

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• How to truncate the string into required length in iphone sdk?

  - by monish

  Hi guys, I am having a string which contains more the 25 characters; NSString *str = @"This is the string to be truncated to 15 characters only"; In the above string I need only the 15 characters to be stored in another variable after truncation. can anyone suggest me how to do this? Anyone's help will be much appreciated. Thank you, Monish

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• File size in Python server

  - by Anna

  We have server on Python and client + web service on Ruby. That works only if file from URL is less than 800 k. It seems like "socket.puts data" in a client works, but "output = socket.gets" - not. I think problem is in a Python part. For big files tests run "Connection reset by peer". Is it buffer size variable by default somewhere in a Python?

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• Django: Get bound IP address inside settings.py

  - by Silver Light

  Hello! I want to enable debug (DEBUG = True) For my Django project only if it runs on localhost. How can I get user IP address inside settings.py? I would like something like this to work: #Debugging only on localhost if user_ip = '127.0.0.1': DEBUG = True else: DEBUG = False How do I put user IP address in user_ip variable inside settings.py file?

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• VBA Range.Rows.Count giving unexpected results

  - by Jeffrey

  I have a Range variable that contains an address - $2:$2,$4:$205,$214:$214 - (3 groups of rows). I would like to get the count of all the rows in that range. However, range.Count gives me the count of all the cells (50,000~) and range.Rows.Count only return 1 - the count of all the rows in the first group. How do I get the count of all the rows Thanks

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• I want to use sed to replace every occurrence of /dir with $dir (replace / with $) in every script

  - by gm

  use sed to replace every occurrence of /dir with $dir (replace / with $) in every script in a directory. sed "s#/dir#$dir#g" The $ keeps being interpreted as a function or variable call. Is there a way around this? thanks

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• What does this URL structure mean?

  - by SteD

  Does this mean that it will be looking for index.php and provide the GET variable y with /home/xxx/public_html/control/&x=shell? http://www.xxx.com/control/?y=/home/xxx/public_html/control/&x=shell Long story: Website got defaced, and found this b374k script when browsing to one of the page, I am trying to figure out where exactly they injected this script, thus trying to figure out a hint from this url where the scripts resides in.

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• setting variables to false

  - by SuperString

  I am working in flex and I am just setting a variable to false. It doesnt do anything in the program but everything breaks when I put this line of code in: somevar = false; Does anyone know why?

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• Javascript (JSON) Objects: Get Parent

  - by Dänu

  Hey Guys I got some question about nested javascript objects (is it me, google or is javascript quite poorly documented?). Now, I got the following (nested) object: obj: { subObj: { 'hello world' } }; next thing I do is to reference the subobject like this: var s = obj.subObj; now what I would like to do, is to get a reference to the object obj out of the variable s. Something like: var o = s.parent; Is this somehow possible?

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• How to create global variables in a Grails project

  - by firnnauriel

  What's the best practice of making a variable that would be accessible by almost all classes in a Grails project? Is there a config file that I can use for storage of that data (i.e. application.properties)? Thanks.

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• dao as a member of a servlet - normal?

  - by EugeneP

  I guess, DAO is thread safe, does not use any class members. So can it be used without any problem as a private field of a Servlet ? We need only one copy, and multiple threads can access it simultaneously, so why bother creating a local variable, right?

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• PHP how to limit lines in a string ?

  - by Axel

  Hi, i have a variable like the following and i want a function to only keep the first 20 lines, so it will strips any additional \n lines more than 20. <?php $mytext="Line1 Line2 Line3 ....." keeptwentyline($mytext); ?>

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• In @Table(name = "tableName") - make "tableName" a veriable in JPA

  - by zengr

  I am using JPA and I need to make the "tableName" a variable. In a database, I have many tables, and my code needs to access the table where I specify it to read. @Entity @Table(name = "tableName") public class Database implements Serializable {...............} Any ideas?

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• Bash PWD Shortening

  - by dlibby00

  I'm looking for a bash function that will shorten long path names to keep my PS1 variable from getting excessively long. Something along the lines of: /this/is/the/path/to/a/really/long/directory/i/would/like/shortened might end up as: /t../i../t../p../to/a/r../l../d../i/w../like/shortened something that the took the path and a maximum acceptable number of characters to shorten to would be perfect for my .bashrc file.

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• PHP ToString() equivalent

  - by Antoine Aubry

  How do I convert the value of a PHP variable to string? I was looking for something better than concatenating with an empty string: $myText = $myVar . ''; like the ToString() method in Java or .NET.

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• How to assign a value of a property to a var ONLY if the object isn't null

  - by Blankman

  In my code, is there a shorthand that I can use to assign a variable the value of a object's property ONLY if the object isn't null? string username = SomeUserObject.Username; // fails if null I know I can do a check like if(SomeUserObject != null) but I think I saw a shorthand for this kind of test. I tried: string username = SomeUserObject ?? "" : SomeUserObject.Username; But that doesn't work.

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• Passing function-specific variables

  - by Simon Carlson

  Say I got two functions that looks like this: function main(Index) { doStuff(); } function doStuff() { if(Index == 1) { document.write("Hello world!") } } And some HTML: <input type="button" value="Click me" onclick="main(1)" /> I realize this is a very stupid way to use function-specific variables and such, but it's just out of curiosity. So is it possible to pass the variable Index from the main function to the doStuff function?

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• Passing a parameter to an html function

  - by user338543

  how pass a parameter to onload function?? <body onLoad="myFunction(<%=myVar%>)"> It crashes. The parameter is a vb variable defined with Dim The function is a vbscript function Urgent HELP

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• Understanding this prolog implementation of head

  - by dmindreader

  head([Y],Y):-!. head([X|XS],X). I understand that the head of the list is stored on the variable X. What does the first clause mean? Is it a cut? Why?

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