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Search found 64 results on 3 pages for 'jacques joubert'.

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• How to generate a unique hash for a URL ?

  - by Jacques René Mesrine

  Given these two images from twitter. http://a3.twimg.com/profile_images/130500759/lowres_profilepic.jpg http://a1.twimg.com/profile_images/58079916/lowres_profilepic.jpg I want to download them to local filesystem & store them in a single directory. How shall I overcome name conflicts ? In the example above, I cannot store them as…

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• For a primary key of an integral type, why is it important to avoid gaps ?

  - by Jacques René Mesrine

  I am generating a surrogate key for a table & due to my hi/lo algorithm, everytime you reboot/restart the machine, gaps may appear. T1: current hi = 10000000 (sequence being dished out .. 1 to 100) Assume that current sequence is 10000050 T2: restart system. T3: System gives out the next_hi as 10000100 (sequence…

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• Update n number of records using JPA with Optimistic locking

  - by Jacques René Mesrine

  I have a table with a column called "count" and I want to run a cron job that will trigger a statement that performs a SQL like this: update summaryTable set count=4; Note that there might be concurrent threads reading & changing the value for "count" when this cron job is triggered. The table has a version column to support…

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• Dependency on Spring's annotations

  - by Jacques René Mesrine

  I have annotated my classes with @Repository, @Resource, @Component, @Service annotations but these classes must run in 2 environments. The first environment is Spring 2.x based while the other has no spring at all. I'm sure the code will fail without the spring jars & I want to know ideas from you on how I can retain the…

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• MAD method compression function

  - by Jacques

  I ran across the question below in an old exam. My answers just feels a bit short and inadequate. Any extra ideas I can look into or reasons I have overlooked would be great. Thanx Consider the MAD method compression function, mapping an object with hash code i to element [(3i + 7)mod9027]mod6000 of the 6000-element bucket…

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• Using HTTP Vary header to decide on a strategy to process a request

  - by Jacques René Mesrine

  I have a specific REST endpoint that creates a topic in a forum; but I want to apply different strategies when processing the request. e.g. If client A makes the call, perform moderation. if client B makes the call, do something else. The easiest would be to add a query param for differentiation: POST /resource?from=xyz …

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• What frameworks to use to bootstrap my first production scala project ?

  - by Jacques René Mesrine

  I am making my first foray into scala for a production app. The app is currently packaged as a war file. My plan is to create a jar file of the scala compiled artifacts and add that into the lib folder for the war file. My enhancement is a mysql-backed app exposed via Jersey & will be integrated with a 3rd party site…

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• Copying a field to another table in Access

  - by Jacques Tardie

  I'm a bit embarassed asking this here, but here goes: I've got two tables, which you can see here: http://img411.imageshack.us/img411/4562/query.jpg I need to copy the effortid from the one table into the other, making sure that the values still maintain the correction relationships. The primary key for each is a…

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• How do I write JPA QL statements that hints to the runtime to use the DEFAULT value ?

  - by Jacques René Mesrine

  I have a table like so: mysql> show create table foo; CREATE TABLE foo ( network bigint NOT NULL, activeDate datetime NULL default '0000-00-00 00:00:00', ... ) In the domain object, FooVO the activeDate member is annotated as Temporal. If I don't set activeDate to a valid Date instance, a new record…

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• How to differentiate between time to live and time to idle in ehcache

  - by Jacques René Mesrine

  The docs on ehache says: timeToIdleSeconds: Sets the time to idle for an element before it expires. i.e. The maximum amount of time between accesses before an element expires timeToLiveSeconds: Sets the time to live for an element before it expires. i.e. The maximum time between creation time and when an element…

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• Permutation algorithm in the form of..

  - by Jacques

  R= repeats allowed -> 2 A= alphabet (1-10) S= space = 4; So we want example: [1][1][4][5] [1][7][4][5] [5][1][4][5] But need a fancy math formula to calculate this and all combinations ?

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• How to turn off autosignin of registered transports in Openfire ?

  - by Jacques René Mesrine

  This is regarding the gateway XEP 0100 support in Openfire. I have noticed that for some transports, they are auto-signed in once a connection to openfire succeeds (via the xmpp user). This applies specifically to QQ. How does one turn off this auto-signin feature ? Basically from a client perspective, I want to…

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• Are there any good sites for blogging about programming?

  - by Jacques Bosch

  I have a few programming articles I would like to write, but I do not have a site of my own - yet ;). Is there a site that is specifically geared toward technical / programming topics, with great functionality and style? Or will I have to go with things like wordpress or blogspot? I would like a site that can…

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• scala REPL is slow on vista

  - by Jacques René Mesrine

  I installed scala-2.8.0.RC3 by extracting the tgz file into my cygwin (vista) home directory. I made sure to set $PATH to scala-2.8.0.RC3/bin. I start the REPL by typing: $ scala Welcome to Scala version 2.8.0.RC3 (Java HotSpot(TM) Client VM, Java 1.6.0_20). Type in expressions to have them evaluated. Type…

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• What is the fastest way to learn JPA ?

  - by Jacques René Mesrine

  I'm looking for the best resources (books, frameworks, tutorials) that will help me get up to speed with JPA. I've been happily using iBatis/JDBC for my persistence needs, so I need resources that will hopefully provide comparable functions on how to do things. e.g. how to I set the isolation level for each…

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• How to ensure that no non-ascii unicode characters are entered ?

  - by Jacques René Mesrine

  Given a java.lang.String instance, I want to verify that it doesn't contain any unicode characters that are not ASCII alphanumerics. e.g. The string should be limited to [A-Za-z0-9.]. What I'm doing now is something very inefficient: import org.apache.commons.lang.CharUtils; String s = ...; char[] ch =…

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• Partitioning requests in code among several servers

  - by Jacques René Mesrine

  I have several forum servers (what they are is irrelevant) which stores posts from users and I want to be able to partition requests among these servers. I'm currently leaning towards partitioning them by geographic location. To improve the locality of data, users will be separated into regions e.g.…

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• All site interaction through a single page

  - by Jacques Wolfghang

  Hi there I have an idea for a site where there would be no refreshing and all interactions take place via AJAX. The page would load with central space, where all interaction would take place. If a user clicked on a link, the page would request it via AJAX and replace the rectangle's content with…

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• How to add the ToPoint and FromPoint of a line on one layer to another layer / feature class

  - by Jacques Bosch

  I have a roads layer. I need to ad a point to another, point layer where ever roads intersect. How can I add such points to the existing points layer. In hand I have the line layer, the line feature / To and From Points, and the points layer. I just need a pointer as to how to create points in…

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• How to maintain a pool of names ?

  - by Jacques René Mesrine

  I need to maintain a list of userids (proxy accounts) which will be dished out to multithreaded clients. Basically the clients will use the userids to perform actions; but for this question, it is not important what these actions are. When a client gets hold of a userid, it is not available to…

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• Access Validation Rule Violations on Append Query

  - by Jacques Tardie

  I'm recieving the following error on trying to run an append query in access. Microsoft Office Access set .... and it didnt't add... 779280 records(s) due to validation rule violations. If I choose to run the query anyways, nothing actually happens. To give some context, I'm simply trying…

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• How to find points that intersect an envelope of a line, but not the line itself?

  - by Jacques Bosch

  I have 2 layers. A lines layer and a points layer. For any given line, how can I find the points that intersect the envelope of the line, but not the line itself, or more specifically, not the to point or from point of the line. I can obviously find all the points that intersect the line's…

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• Best free, online Python tutorials and references for an experienced programmer?

  - by Jacques Bosch

  I have been doing Java, and C# for many years. Starting on my first big Python program now. I have written a few, very small, text processing scripts in Python years ago. I would like to know what is the best, free, online Python tutorial for experienced programmers. Python in general, but…

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• ArcObjects: Why is my StandaloneTableCount 0? (IStandaloneTableCollection)

  - by Jacques Bosch

  When I do: IStandaloneTableCollection collection = (IStandaloneTableCollection)MxDoc.FocusMap Then collection.StandaloneTableCount returns 0. I have created the new table via ArcCatelog and registered it as versioned. What am I missing?

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• Why does JPA require a no-arg constructor for domain objects ?

  - by Jacques René Mesrine

  Why does JPA require a no-arg constructor for domain objects ? I am using eclipselink and just got this exception during deployment. Exception [EclipseLink-63] (Eclipse Persistence Services-1.1.0.r3639-SNAPSHOT): org.eclipse.persistence.exceptions.DescriptorException Exception…

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