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Programmer Puzzle: Encoding a chess board state throughout a game
...ve), a draw can be claimed. The positions need not occur in any particular order (meaning it doesn’t have to the same sequence of moves repeated three times). This one greatly complicates the problem because you have to remember every previous board position. If this is a requirement of the proble...
How to avoid mysql 'Deadlock found when trying to get lock; try restarting transaction'
... that can help with most deadlocks is sorting the operations in a specific order.
You get a deadlock when two transactions are trying to lock two locks at opposite orders, ie:
connection 1: locks key(1), locks key(2);
connection 2: locks key(2), locks key(1);
If both run at the same time, connecti...
How does Python's super() work with multiple inheritance?
...nable amount of detail by Guido himself in his blog post Method Resolution Order (including two earlier attempts).
In your example, Third() will call First.__init__. Python looks for each attribute in the class's parents as they are listed left to right. In this case, we are looking for __init__. S...
Concurrent vs serial queues in GCD
...serial) is the ONLY element that decides whether the tasks are executed in order or in paralel;; (2)the dispatch type (sync or async) is only saying whether the execution goes OR doesn't go to the next instruction? I mean, if I dispatch a task SYNC the code will block until that tasks finishes, no m...
Maven command to list lifecycle phases along with bound goals?
...install the plugin if it hasn't already been installed.
List goals by the order they will execute
> mvn fr.jcgay.maven.plugins:buildplan-maven-plugin:list
PLUGIN | PHASE | ID | GOAL
-----------------------------------------------------------...
How to sort the result from string_agg()
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With postgres 9.0+ you can write:
select string_agg(product,' | ' order by product) from "tblproducts"
Details here.
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How to handle click event in Button Column in Datagridview?
...y the documentation at MSDN to hardcode the column index or column name in order to determine if a button was clicked. The click event registers for the entire grid, so somehow you need to determine that a button was clicked, but you should not do so by assuming that your button lives in a particul...
With MySQL, how can I generate a column containing the record index in a table?
... People should be aware that this row number is calculated before any ordering takes place, so the numbers may become jumbled up if the order changes the row order.
– Grim...
Nov 8 '12 at 14:20
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Android - Handle “Enter” in an EditText
... It's usually better to perform actions on KeyEvent.ACTION_UP. In order for this to work, you need to first consume the ACTION_DOWN event: if (actionId == EditorInfo.IME_NULL && event.getAction() == KeyEvent.ACTION_DOWN) { return true; }. Then you can check for the ACTION_UP event a...
Looping through a hash, or using an array in PowerShell
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How can I enumerate the hash in another order? E.g. when I want to print its content in ascending order (here a ... b ... c). Is it even possible?
– LPrc
Oct 27 '17 at 14:14
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