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• Jsp cache problem

  - by idiotgenius

  I use javascript and css to build a multi-level drop down menu with following markups: <ul> <li>menu item 1</li> <ul> <li><a href="#">sub menu menu item 1</a></li> ................. This markup is generated by a custom JSTL tag <mui:menu .../> which loads menu data from a database. I hope my jsp page can behave like this: if menu data has not changed since last time I visited the page, just use browser's cache otherwise load from database... How can I do it? I don't know much detail about cache mechanism.

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• iPhone Safari Web Application not using cache at all?

  - by Liuyi Sun

  Hi, guys, I've been developing an iphone web application for a while, and encountered a weird problem: when open the web app in safari(with safari chrome, not starting it from home screen), safari can generate proper "If-Not-Modified-Since" and "If-None-Matches", so the server simply gives 304 Not Modified to speed up the process. however, when starting the app from home screen, safari seems to forget these two headers, and server always replies with 200 OK... any ideas for this?

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• Is there a shorthand form to get variables' values with numbered scopes?

  - by guillermooo

  Is there any shorter way of doing this? & { $a = 1 ; & { $a = 2 ; & { get-variable -name a -scope 2 } } } ... like, for instance, this?: & { $a = 1 ; & { $a = 2 ; & { $2:a } } }

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• NoSQL replacement for memcache

  - by Juan Antonio Gomez Moriano

  We are having a situation in which the values we store on memcache are bigger than 1MB. It is not possible to make such values smaller, and even if there was a way, we need to persist them to disk. One solution would be to recompile the memcache server to allow say 2MB values, but this is either not clean nor a complete solution (again, we need to persist the values). Good news is that We can predict quite acurately how many key/values pair we are going to have We can also predict the total size we will need. A key feature for us is the speed of memcache. So question is: is there any noSQL replacement for memcache which will allow us to have values longer than 1MB AND store them in disk without loss of speed? In the past I have used tokyotyrant/cabinet but seems to be deprecated now. Any idea?

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• Controlling when SQL UPDATE is executing on ehcache 'd classes

  - by thomers

  We are using Hibernate and ehcache as 2nd level cache. If I load an entity that is cached (e.g. cache-usage="read-write") and update it, it seems that this immediately results in an SQL UPDATE. (How) Can I influence when this SQL UPDATE happens? hibSession = HibernateUtil.getReadWriteSession(); tx = hibSession.beginTransaction(); User u = (User) hibSession.load(User.class, user_id); u.modify(); hibSession.update(u); tx.commit(); Edit: It seems that setting a CacheMode should have an effect, but each hibSession.update() results in an immediate SQL UPDATE, regardless which CacheMode I set.

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• TERM environment variable not set

  - by rahkarp

  I'm using python to develop an app and want to view running processes.The code txt = commands.getoutput("top -d 1") print txt gives an error "TERM Environment Variable not set" Can someone tell me what this means and how to solve this

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• Where is the classpath variable restored in eclipse?

  - by httpinterpret

  If I manually add another variable like M2_REPO pointing to a directory, I don't find it in either .project or .classpath, where is it restored then?

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• Should I sanitize EVERY form variable passed along?

  - by Camran

  I have a form with many fields... The action is set to a php page which queries mysql... Should I sanitize with mysql_real_escape_string every single variable? Or can I ignore sanitizing drop-lists and radios for instance? Also, besides mysql_real_escape_string, what else should I do to prevent attacks? Thanks

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• Variables variable and inheritance

  - by Xack

  I made code like this: class Object { function __get($name){ if(isset($this->{$name})){ return $this->{$name}; } else { return null; } } function __set($name, $value){ $this->{$name} = $value; } } If I extend this class (I don't want to repeat this code every time), it says "Undefined variable". Is there any way to do it?

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• Extern variable at specific address

  - by AndiNo

  Using C++ and GCC, can I declare an extern variable that uses a specific address in memory? Something like int key attribute((__at(0x9000))); AFAIK this specific option only works on embedded systems. If there is such an option for use on the x86 platform, how can I use it?

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• Use the keyword class as a variable name in C++

  - by Leif Andersen

  I am having trouble writing C++ code that uses a header file designed for a C file. In particular, the header file used a variable name called class: int BPY_class_validate(const char *class_type, PyObject *class, PyObject *base_class, BPY_class_attr_check* class_attrs, PyObject **py_class_attrs); This works in C as class isn't taken as a keyword, but in C++, class is. So is there anyway I can #include this header file into a c++ file, or am I out of luck? Thank you.

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• Android: How to initialize a variable of type "Location" (other than making it equal to null)

  - by Aidan

  Hi Guys, I'm looking to test some code I've written and to do so I need to construct a variable of type Location and to give it a long / lat value but I'm unsure how I would do so. Any ideas?

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• Reset SQL variable inside SELECT statement

  - by Jason McCreary

  I am trying to number some rows on a bridge table with a single UPDATE/SELECT statement using a counter variable @row. For example: UPDATE teamrank JOIN (SELECT @row := @row + 1 AS position, name FROM members) USING(teamID, memberID) SET rank = position Is something like this possible or do I need to create a cursor? If it helps, I am using MySQL 5.

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• Jquery Autocomplete Increase Number of Items to display

  - by techsoft

  I have being using jquery autocomplete. By default it is showing 10 items in the dropdown, i want to increase its number to 20 or customise it according to requirement. i have tried many ways of cache length but none of them is working. pls suggest a way.

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• variable scope when adding a value to a vector in class constructor

  - by TheFuzz

  I have a level class and a Enemy_control class that is based off an vector that takes in Enemys as values. in my level constructor I have: Enemy tmp( 1200 ); enemys.Add_enemy( tmp ); // this adds tmp to the vector in Enemy_control enemys being a variable of type Enemy_control. My program crashes after these statements complaining about some destructor problem in level and enemy_control and enemy. Any ideas?

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• How can I configure apigee to fail stale if the backend is unavialble?

  - by Anurag Kapur

  We have an API proxy configured with cache ttl of 2mins. Is it possible to configure apigee to serve stale cached content if the backend goes down so that our end users don't see errors? We would rather have our end users get copies of stale cached content (even after the configured ttl of 2mins expires) instead of errors when the backend goes down. Would appreciate if someone could point me to the relevant documentation if this is possible.

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• pass variable to every controller Using the Registry in Zend Framework

  - by Behrang

  Can I use zend Registry to save variable to use in other controller? this is my code that don't work in another controller: Zend_Registry::set('id', $Id);

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• Problem with modifying a page with ajax, and the browser keeping the unmodified page in cache.

  - by David Lawson

  Hey there, I have a situation where my page loads some information from a database, which is then modified through AJAX. I click a link to another page, then use the 'back' button to return to the original page. The changes to the page through AJAX I made before don't appear, because the browser has the unchanged page stored in the cache. Is there a way of fixing this without setting the page not to cache at all? Thanks :)

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• Hashing a python function to regenerate output when the function is modified

  - by Seth Johnson

  I have a python function that has a deterministic result. It takes a long time to run and generates a large output: def time_consuming_function(): # lots_of_computing_time to come up with the_result return the_result I modify time_consuming_function from time to time, but I would like to avoid having it run again while it's unchanged. [time_consuming_function only depends on functions that are immutable for the purposes considered here; i.e. it might have functions from Python libraries but not from other pieces of my code that I'd change.] The solution that suggests itself to me is to cache the output and also cache some "hash" of the function. If the hash changes, the function will have been modified, and we have to re-generate the output. Is this possible or ridiculous? Updated: based on the answers, it looks like what I want to do is to "memoize" time_consuming_function, except instead of (or in addition to) arguments passed into an invariant function, I want to account for a function that itself will change.

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• Cache JSP based on URL parameter

  - by Satheesh

  I have a jsp file pageshow.jsp and the parameter id, Is there any way to cache the jsp file in server-side based on the url parameter Requesting page pageshow.jsp?id=100 get from cache instead of building from server Requesting page pageshow.jsp?id=200 get from cache instead of building from server Above two pages should have different cache content since their parameter are different This may avoid the rebuilding the jsp file in server side and also decrease the server load

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• C# delete space from variable

  - by lolalola

  Hi, now variable looks like: name = "Lola ...long space..."; How delete space after "Lola"? How to Get this Results: name = "Lola"; Thanks

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• Multithreaded java cache for objects that are heavy to create ?

  - by krosenvold

  I need a cache some objects with fairly heavy creation times, and I need exactly-once creation semantics. It should be possible to create objects for different CacheKeys concurrently. I think I need something that (under the hood) does something like this: ConcurrentHashMap<CacheKey, Future<HeavyObject>> Are there any existing open-source implementations of this that I can re-use ?

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• Accessing HttpApplication.Application variables from a class

  - by Young Ninja

  I set up various global parameters in Global.asax, as such: Application["PagePolicies"] = "~/Lab/Policies.aspx"; Application["PageShare"] = "/Share.aspx"; Application["FileSearchQueries"] = Server.MapPath("~/Resources/SearchQueries.xml"); ... I have no problem accessing these variables form .ascx.cs or .aspx.cs file -- ie. files that are part of the Web content. However, I can't seem to access 'Application' from basic class objects (ie. standalone .cs files). I read somewhere to use a slight variations in .cs files, as follows, but it always comes throws an exception when in use: String file = (String)System.Web.HttpContext.Current.Application["FileSearchQueries"];

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• how to display the values of a map variable in javascript

  - by user329551

  I have a javasrcript variable var hash = { '.bmp' : 1, '.gif' : 1, '.jpeg' : 1, '.jpg' : 1, '.png' : 1, '.tif' : 1, '.tiff' : 1, }; I want to display the values (.bmp, .gif, .jpeg, .jpg, .png, .tif, .tiff) of this "hash" object in my alert message. How can I do this? Please help.

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• Delete cache when web browser is close.

  - by Edy Cu

  Hi all. I have issue about multiple login in asp.net. Case this happen: User X login as "user1" in web browser. Then user Y also login as "user1" also in another web browser. User Y got error message "Another user log in some account". That is work as expected. If X, close their web browser. Then try again to login in as "user1". X get also get "Another user log in some account". So i trying debug then i found session is remove when web browser is close, but cache still remaining in web browser. Anyone have idea about this how to clear cache when user close their browser, (not tab). Regard.

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