partition

C# - elegant way of partitioning a list?

Hi, I'd like to partition a list into a list of lists, by specifying the number of elements in each partition. For instance, suppose I have the list {1, 2, ... 11}, and would like to partition it such that each set has 4 elements, with the last set filling as many elements as it can. The resulting partition would look like {{1..4}, {5...

How can I maximally partition a set?

I'm trying to solve one of the Project Euler problems. As a consequence, I need an algorithm that will help me find all possible partitions of a set, in any order. For instance, given the set 2 3 3 5: 2 | 3 3 5 2 | 3 | 3 5 2 | 3 3 | 5 2 | 3 | 3 | 5 2 5 | 3 3 and so on. Pretty much every possible combination of the members of the set....

Predicate syntax when partitioning a vector of pointers (C++)

I have a vector of pointers to objects. I'd like to remove objects from this vector according to an attribute that's reported by a member function. I'm trying to follow a nice example I found on how to delete certain pointers (and their associated objects) from the vector. The basic idea is to partition the vector, delete the chosen obj...

How to make ActiveRecord work with legacy partitioned/sharded databases/tables?

Hi all, thanks for your time first...after all the searching on google, github and here, and got more confused about the big words(partition/shard/fedorate),I figure that I have to describe the specific problem I met and ask around. My company's databases deals with massive users and orders, so we split databases and tables in various ...

mysqldump with partitioned table

Hi, I have a large MyiSam table and I recently partitioned it. I backup the db every day usng mysqldump but rather than bakcup the entire large table, I'd like to just backup certain partition(s). Is there any way that I can specify which partitions to dump using mysqldump? ...

Is there a standard user interface paradigm for configuring the partition of a set of elements?

Consider you have a set of objects X (e.g., A, B, C, D) that you wish to divide into non-empty subsets that cover all of X. Mathematically, a partition of the set. So, at first you might treat them as all different, {{A}, {B}, {C}, {D}}. Alternatively, you could separate them into vowels and consonants, i.e. {{A}, {B,C,D}}. Or, arbitra...

Renaming partitions in ORACLE.

if we use the ALTER TABLE RENAME PARTITION statement to rename the existing partitions in an Oracle table, do we need to recreate the local partitioned indexes with newly changed partition names? ...

Partition a USB stick programmatically under Linux

After deleting the partitions from a USB stick and then re-inserting the disk I see the following from dmesg: [99341.658055] sd 4:0:0:0: [sdb] 15771720 512-byte logical blocks: (8.07 GB/7.52 GiB) [99341.658670] sd 4:0:0:0: [sdb] Write Protect is off [99341.658678] sd 4:0:0:0: [sdb] Mode Sense: 00 00 00 00 [99341.658684] sd 4:0:0:0: [sdb...

Disk partition structure

Hi, Is there any way in Java (1.6+) to retrieve the partition disk structure? (For example: NTFS, FAT32, HFS+, or EXT3.) External libraries are permitted. Thanks, Gianni ...

Partition method

Hi, I am trying to understand exactly what this method does, it say its suppose to "Keep swapping the outer-most wrongly-positioned pairs". I put this into a program and tried different array but the result make no sense to me, what exactly does this do partition(A, p) A: array of size n, p: integer s.t. 0 <= p < n 1. swap(A[0],A[p...

DB2 count(*) over(partition by fieldname) giving -104 z/OS version 7

I have slimmed down the query to remove potential complications, in addition I have verified that the fields are correct. DB2 UDB zSeries V7 is my db2 version. SELECT STDINSTRCD, count(*) over(partition by STDINSTRCD), CAST(STDINSTRDESC AS VARCHAR(1000)) AS INSTR, C.STDINSTRSEQ, 1 FROM SYST.SCC004 C WHERE C.STDINSTRCD = '098'...

Way to know if two partitions are in one physical hard disk without WMI?

Hey. I have those partitions (in Windows) for example: Hard Disk 1 - Partition C, Partition D Hard Disk 2 - Partition E Is there any way in a program language to know if for example partition C and partition D are in one physical hard disk without WMI? I don't want to use WMI because it's slow - for this example, it took for me 0.5 ...

Partition information from CMD

Is there any CMD command line that shows all partition letters. For example: C, D, E... Can that command also show all the partition's information? Free space, used space, total space? ...

Create/delete disk partitions via WMI

Hi, there is a way to create/delete disk partitions via WMI ? I'm already able to mount/unmount virtual disks (vhd) and list their partitions. ...

How can I import a partition from one table into another in Oracle?

I would like to know if the following steps are possible and how fast this is: Create a partition named part1 in Table A Drop partition part1 in Table B Import the Table A partition part1 into Table B Can you provide me with an example if it is possible indeed? Or any resources I can look at? Note that the tables would have the exac...

Using Partitions for a large MySQL table

An update on my attempts to implement a 505,000,000-row table on MySQL on my MacBook Pro: Following the advice given, I have partitioned my table, tr: i UNSIGNED INT NOT NULL, j UNSIGNED INT NOT NULL, A FLOAT(12,8) NOT NULL, nu BIGINT NOT NULL, KEY (nu), key (A) with a range on nu. nu ought to be a real number, but because I only have...

What is the use of the "Partition" keyword in MySQL?

As I am a MySQL newbie. What does PARTITION mean in this MySQL statement? CREATE TABLE employees ( id INT NOT NULL, fname VARCHAR(30), lname VARCHAR(30), hired DATE NOT NULL DEFAULT '1970-01-01', separated DATE NOT NULL DEFAULT '9999-12-31', job_code INT NOT NULL, store_id INT NOT NULL ) PARTITION BY RANGE (s...

How to get Hidden Partitions in the Harddisk in VC++?

How to get Hidden Partitions in the Harddisk in VC++? Does any one knows this. please share info.... Thanks in advance. ~Hara ...

Unique partition ID

I'm looking for same way to get an unique ID of every partition in Win OS. Also for flash drives (SD cards, pendrives, etc.) connected to PC. I think that after formatting they get an unique ID - like MAC, right? Also I want to get other information of that partition - it's name, file system, size, etc. ...

Replace duplicate values in array with new randomly generated values

I have below a function (from a previous question that went unanswered) that creates an array with n amount of values. The sum of the array is equal to $max. function randomDistinctPartition($n, $max) { $partition= array(); for ($i = 1; $i < $n; $i++) { $maxSingleNumber = $max - $n; $partition[] = $number = rand(1, $maxSingl...