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What is causing “Unable to allocate memory for pool” in PHP?

I've occasionally run up against a server's memory allocation limit, particularly with a bloated application like Wordpress, but never encountered "Unable to allocate memory for pool" and having trouble tracking down any information. ...
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Pipe to/from the clipboard in Bash script

...u talk to it. In the case of X, there's xclip (and others). xclip -selection c will send data to the clipboard that works with Ctrl + C, Ctrl + V in most applications. If you're on Mac OS X, there's pbcopy. e.g cat example.txt | pbcopy If you're in Linux terminal mode (no X) then look into gpm or...
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Reorder / reset auto increment primary key

...e reassigned in order. However this is probably a bad idea in most situations. If you have other tables that have foreign keys to this table then it will definitely not work. share | improve this ...
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Difference between style = “position:absolute” and style = “position:relative”

Can any one tell me the Difference between style = "position:absolute" and style = "position:relative" and how they differ in case I add it to div / span / input elements? ...
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Rails: How to get the model class name based on the controller class name?

... This will do it: class HouseBuyersController < ApplicationController def index @model_name = controller_name.classify end end This is often needed when abstracting controller actions: class HouseBuyersController < ApplicationController de...
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Is Java's assertEquals method reliable?

...ls() is a better approach. Well, I'm doing JUnit testing and my inclination is to use assertEquals(str1, str2) . Is this a reliable way to assert two Strings contain the same content? I would use assertTrue(str1.equals(str2)) , but then you don't get the benefit of seeing what the expected and...
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Textarea to resize based on content length [duplicate]

... You can check the content's height by setting to 1px and then reading the scrollHeight property: function textAreaAdjust(element) { element.style.height = "1px"; element.style.height = (25+element.scrollHeight)+"px"; } <textarea onk...
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Node.js: printing to console without a trailing newline?

Is there a method for printing to the console without a trailing newline? The console object documentation doesn't say anything regarding that: ...
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Logging levels - Logback - rule-of-thumb to assign log levels

... type systems, so my answer is biased towards looking at it from a production support standpoint; that said, we assign roughly as follows: error: the system is in distress, customers are probably being affected (or will soon be) and the fix probably requires human intervention. The "2AM rule" app...
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What are App Domains in Facebook Apps?

I want to add the ability to 'login with Facebook' to my site. But I am confused when I register my site in Facebook Apps. What should I input into App Domains ? ...