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What actually causes a Stack Overflow error? [duplicate]
I've looked everywhere and can't find a solid answer. According to the documentation, Java throws a java.lang.StackOverflowError error under the following circumstance:
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Assign multiple columns using := in data.table, by group
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Thanks for this answer and the examples. How should I modify the following line in order to get two columns for each objectName from the dim output, rather than one column with two rows? data.table(objectName=ls())[,c("rows","cols"):=dim(get(objec...
How to document a string type in jsdoc with limited possible values
...t least declare the enum to JSDOC, for this, though. But the code is clean and you get auto-completion in WebStorm.
The multiple files problem though cannot be solved this way.
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Determine if Android app is being used for the first time
I am currently developing an android app. I need to do something when the app is launched for the first time, i.e. the code only runs on the first time the program is launched.
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How to use a WSDL file to create a WCF service (not make a call)
I have an old WSDL file and I want to create a server based on this WSDL file.
5 Answers
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Is a RelativeLayout more expensive than a LinearLayout?
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In a talk at Google I/O 2013 (Writing Custom Views for Android), Romain Guy clarified the misunderstanding that caused everyone to start using RelativeLayouts for everything. A RelativeLayout always has to do two measure passes. Overall it is negligible as long as your view hiera...
Set attribute without value
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@Andrew I believe that you're looking for the removeAttr/prop functions. It depends which attribute you're trying to remove.
– Lix
Nov 10 '18 at 21:30
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is_file or file_exists in PHP
...rk to work, you should add clearstatcache(); since the results for is_file and file_exists are cached throughout the script. Anyways file_exists() is a bit slower, but shouldn't make any difference unless you perform around 100K file checks. php.net/manual/en/function.clearstatcache.php
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Right query to get the current number of connections in a PostgreSQL DB
...ed Mar 11 '11 at 8:52
Magnus HaganderMagnus Hagander
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Pry: show me the stack
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Use the pry-stack_explorer plugin, it allows you to move up and down the call-stack (with up and down), display the callstack (with show-stack), and so on:
see here:
Frame number: 0/64
From: /Users/johnmair/ruby/rails_projects/personal_site/app/controllers/posts_controller.rb @ lin...