Does the speed of the query depend on the number of rows in the table?
- by Omu
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?
Search Results
Search found 25754 results on 1031 pages for 'serial number'.
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How to reverse a number as an integer and not as a string?
- by Pritam
I came across a question "How can one reverse a number as an integer and not as a string?" Could anyone please help me to find out the answer.Read the article
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Berkeley DB replication: upper limit on number of replicants?
- by Mark Harrison
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.Read the article
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What is a magic number, and why is it bad?
- by Adam Davis
What is a magic number? Why should it be avoided? Are there cases where it's appropriate?Read the article
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Regular expression for getting any letter, symbol, number from 1 to 100 maxlength.
- by rolando
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.Read the article
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Is there any inflector like library that can return a word based on a number?
- by stacker
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. Like: 0 articles 1 article 2 articlesRead the article
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[R] How to create a data.frame with a unknow number of columns ?
- by Olivier
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...Read the article
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Do you know of a log4net appender which rolls on date, but let's you limit the total number of files
- by Michal Drozdowicz
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?Read the article
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How to arrange array in decreasing order of frequency of each number?
- by Rajendra
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.Read the article
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What's the maximum number of operators you that can be used in an if statement?
- by DMinGod
Hi, i'm using jquery and I'm trying to validate a form. My question is - What is the maximum number of tests can you give in a single if statement. function cc_validate () { if ($("#name").val() == "" || $("#ship_name").val() == "" || $("#address").val() == "" || $("#city").val() == "" || $("#ship_city").val() == "" || $("#state").val() == "" || $("#ship_state").val() == "" || $("#postal_code").val() == "" || isNaN($("#postal_code").val()) || $("#phone").val() == "" || $("#ship_phone").val() == "" || isNaN($("#phone").val()) || isNaN($("#ship_phone").val()) || $("#mobile_number").val() == "" || $("#ship_mobile_number").val() == "" || isNaN($("#mobile_number").val()) || isNaN($("#ship_mobile_number").val()) || $("#email").val() == "") { return false; } else { return true; } }Read the article
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search text file using c# and display the line number and the complete line that contains the search
- by Chitresh
Hi, I require help to search a text file (log file) using c# and display the line number and the complete line that contains the search keyword.Read the article
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How to retrieve a phone number for a gprs request in a j2me application?
- by hector
I am creating an j2me application in which for activation user sends a GPRS request request. Can we get the user pnohe number with his GPRS request?Read the article
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How do I tag files in a directory in a SVN repository with a global version number that will appear
- by mithaldu
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?Read the article
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I need to randomize a number between two hex numbers, represented as strings.
- by eriks
...and return the number as string. How can I do that? Is there any library for that?Read the article
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How to include the total number of returned rows in the resultset from SELECT T-SQL command?
- by quarkX
I would like to ask if there is a way to include the total number of rows, as an additional column, in the returned result sets from a TSQL query using also the Row_Number (SQL 2005) command. For example, getting the results set from a query against Book table in a form similar to this: RowNum BookId BookTitle TotalRows -------------------------------------------- 1 1056 Title1 5 2 1467 Title2 5 3 121 Title3 5 4 1789 Title4 5 5 789 Title5 5Read the article
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How to increase/decrease current margin at a number by jquery?
- by Relax
Given an element with unknown margin-left, how to increase its margin-left at a number say 100px? For example, assuming the original margin-left is 100px, the expected result is 100px + 100px thus 200px finally.Read the article
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Does the concept of "magic number" change from language to language?
- by Gerardo Marset
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.Read the article
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How can I get the position of rows relative to total number of rows based on a field?
- by Arms
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.Read the article
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How to efficiently count the number of keys/properties of an object in JavaScript?
- by mjs
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.Read the article
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How to count the number of right children in a binary tree?
- by flopex
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.Read the article
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How can you replicate each row of an R data.frame and specify the number of replications for each ro
- by wkmor1
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 fRead the article
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Do the speed of the query depends on the number of rows in the table ?
- by Omu
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 ?Read the article
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How to do number formatting to 1 decimal point in SSRS?
- by san
Hi, I have a SSRS report with full of number fields. I would like to have that to be displayed as in one decimal. i tried to use F1. it gives me only one decimal points in html rendering, but in excel exported version it shows 2 decimal points. How can i have just one decimal point both ecxel and html rendering. Please comment. Thanks in advance SanRead the article
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Is het possible to read the iPhone phone number out of the settings?
- by Chrizzz
Hi, I would like to pre-populate a UITextfield with the phone number of the current iPhone device. Can that be done? regards, ChristianRead the article
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Is HTTP 404 appropriate for out of range page number on paged content?
- by WooYek
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.Read the article
