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How to avoid java.util.ConcurrentModificationException when iterating through and removing elements
...ould have mentioned that i remove the elements in another part of the code and not the loop itself.
– RoflcoptrException
Nov 12 '11 at 13:28
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Combined area of overlapping circles
I recently came across a problem where I had four circles (midpoints and radius) and had to calculate the area of the union of these circles.
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jquery if div id has children
...uery object that contains the children. So you just need to check the size and see if it has at least one child.
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What is the Swift equivalent of -[NSObject description]?
...is on a Swift type you must implement the CustomStringConvertible protocol and then also implement a string property called description.
For example:
class MyClass: CustomStringConvertible {
let foo = 42
var description: String {
return "<\(type(of: self)): foo = \(foo)>"
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What is a typedef enum in Objective-C?
I don't think I fundamentally understand what an enum is, and when to use it.
13 Answers
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Array to String PHP?
...es, string created by serialize() function of php is readable in PHP only, and you will not like to store such things in your databases specially if database is shared among applications written in different programming languages
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Meteor test driven development [closed]
...ng guide with step-by-step instructions for unit, integration, acceptance, and load testing.
Update 2: As of November 9th, 2015, Velocity is no longer maintained. Xolv.io is focusing their efforts on Chimp, and the Meteor Development Group must choose an official testing framework.
Update: Velocit...
Where does System.Diagnostics.Debug.Write output appear?
...built with csc hello.cs ) prints just Hello via Console! on the console and Hello via OutputDebugString in the DebugView window. However, I cannot see either of the System.Diagnostics.* calls. Why is that?
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ActiveRecord: List columns in table from console
...rmation for a table through ActiveRecord. Crucially for me it was the only and easiest way to gain confidence in what my primary key really was at the database level.
– nibbex
Mar 11 '15 at 17:30
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Backup/Restore a dockerized PostgreSQL database
...ne liner you will have to replace the cat your_dump.sql with the unzip command and pipe that instead of the cat result to docker exec.
– Tarion
May 4 '17 at 18:11
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