Let's say I have this query:
select * from table1 r where r.x = 5
Does the speed of this query depend on the number of rows that are present in table1?
Input : {5, 13, 6, 5, 13, 7, 8, 6, 5}
Output : {5, 5, 5, 13, 13, 6, 6, 7, 8}
The question is to arrange the numbers in the array in decreasing order of their frequency, preserving the order of their occurrence.
If there is a tie, like in this example between 13 and 6, then the number occurring first in the input array would come first in the output array.
I'm considering using Berkeley DB to cache some data on an application cluster. What's a reasonable upper limit on the number of nodes I can plan on Berkeley DB handling? Writing to the database will be from a single node.
As you can read in the tittle i need a regular expression for getting any letter, symbol, number from 1 to 100 maxlength (any text posible). Can someone provide that for me and maybe a good link to understand how it works.
Thank you.
I am using AutoCompleteTextView and want to limit the number of dropdown items visible at a time on screen. Currently it fills up the screen but can i limit it to say 2 items with a scroll bar for displaying more.
I'm using inflector Pluralize and Singularize functions.
I want to know if there is a ready library that know to decide if a word needs to be Pluralize or Singularize based on a number.
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I am working on a project that stores multiple versions in the same svn repo but in different directories. For ease of reference for the coders working on the project I'd like to be able to add a commented tag similarly to
# $Revision: 144 $
However, instead of the file revision it should contain a simple version number like so:
# $Version: 1.63 $
# $Version: 1.64 $
# $Version: 2.0 $
Is there a way to get subversion to do this automatically for a specific directory and all sub-directories as well as for any new files added to those?
Hi,
I need to define an appender for log4net in a way that I get one log file for each day, but the total number of files are limited to, let's say, 30. That is I want to keep only the logs not older then 30 days, delete the older ones.
I've tried doing it with RollingFileAppender, but it seems that specifying a limit of files to keep is not supported. Do you know of an alternative solution that I could use?
Input : {5, 13, 6, 5, 13, 7, 8, 6, 5}
Output : {5, 5, 5, 13, 13, 6, 6, 7, 8}
Question is to arrange the numbers in the array in decreasing order of their frequency preserving the order of their occurrence.
If their is a tie, for example, here 13 and 6 then the number occurring first in input array would come first in output array.
let's say I have this query:
select * from table1 r where r.x = 5
do the speed of this query depends on the number of rows that are present in table1 ?
What's the fastest way to count the number of keys/properties of an object? It it possible to do this without iterating over the object? i.e. without doing
var count = 0;
for (k in myobj) if (myobj.hasOwnProperty(k)) count++;
Firefox provides a magic __count__ property, but this isn't available in other implementations.
I have a scores table that has two fields:
user_id
score
I'm fetching specific rows that match a list of user_id's. How can I determine a rank for each row relative to the total number of rows, based on score? The rows in the result set are not necessarily sequential (the scores will vary widely from one row to the next). I'm not sure if this matters, but user_id is a unique field.
I have a site that is mainly showing a paged list of content (articles, data element's, etc.), and I'm wondering about returning HTTP 404 when user navigates outside of the available list range.
Some sites just display "No results/Page number out of range" and some return additionally return HTTP 404 status.
What's your take on that, and why?
UPDATE
It's not and api response. This question is in regard to user viewed pages that among other things show a list/table in the main area.
Hello
I would like to create, in a function, a boucle to create a data.frame with a variable number of columns.
WIth something like :
a = c("a","b")
b = c(list(1,2,3), list(4,5,6))
data.frame(a,b)
I would like to get a data-frame like :
a 1 2 3
b 4 5 6
Instead of I obtain :
a 1 2 3 4 5 6
b 1 2 3 4 5 6
Thank you !
PS : I also try with rbind, but it's doesn't work...
How to count the number of right children in a binary tree?
This means that I only want the children marked as right.
Ex. (Left | Right)
F(Root)
G | H
T U | I J
The right children would be U,H,and J.
What would be the algorithm to find these.
if ([tempArray containsObject: [sectionInfo indexTitle]])
{
return nil;
}else
{
[tempArray addObject: [sectionInfo indexTitle]];
return [sectionInfo indexTitle];
}
return [sectionInfo indexTitle];
The code above groups the cells in alphabetical order but displays a blank header instead of the appropriate title. Could this possibly be because I did not specify the number of headers? This would naturally be a single header for every letter in the alphabet.
df <- data.frame(var1=c('a', 'b', 'c'), var2=c('d', 'e', 'f'), freq=1:3)
What is the simplest way to expand the first two columns of the data.frame above, so that
each row appears the number of times specified in the column 'freq'?
In other words, go from this:
>df
var1 var2 freq
1 a d 1
2 b e 2
3 c f 3
To this:
>df.expanded
var1 var2
1 a d
2 b e
3 b e
4 c f
5 c f
6 c f
Take the following code in C/C++, for example:
int foo[] = {0, 0, 0, 0};
No magic numbers, right?
Now, the Python "equivalent" of that would be:
foo = [0, 0, 0, 0]
Still no magic numbers.
However, in Python, that same thing can be written like this:
foo = [0] * 4
And now we DO have a magic number. Or do we?
I'm guessing this and other similar things are present on these and other languages.