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PHP - Extracting a property from an array of objects
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What is JavaScript's highest integer value that a number can go to without losing precision?
...= -x
log(x == x + 1) // true !
log(y == y - 1) // also true !
// Arithmetic operators work, but bitwise/shifts only operate on int32:
log(x / 2) // 4503599627370496
log(x >> 1) // 0
log(x | 1) // 1
Technical note on the subject of the number 9,007,199,254,740,992...
Truncate all tables in a MySQL database in one command?
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Drop (i.e. remove tables)
mysql -Nse 'show tables' DATABASE_NAME | while read table; do mysql -e "drop table $table" DATABASE_NAME; done
Truncate (i.e. empty tables)
mysql -Nse 'show tables' DATABASE_NAME | while read table; do mysql -e "truncate table $table" DATABASE_NAME; done
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What is a singleton in C#?
...o said instance. The singleton premise is a pattern across software development.
There is a C# implementation "Implementing the Singleton Pattern in C#" covering most of what you need to know - including some good advice regarding thread safety.
To be honest, It's very rare that you need to implem...
Adding Xcode Workspace Schemes to Version Control
I'd like to share Workspace Schemes that I've created with the other team members. However they are all stored under .xcodeproj > xcuserdata > .xcuserdatad > xcschemes. I've set xcuserdata folders to be ignore in SVN as I assumed all data in that folder were user specific.
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Easy way to dismiss keyboard?
... non-guaranteed side effect from calling an API in a way that it's not documented to work.
– JosephH
Sep 14 '10 at 4:28
3
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How to scale threads according to CPU cores?
...f processes available to the Java Virtual Machine by using the static Runtime method, availableProcessors. Once you have determined the number of processors available, create that number of threads and split up your work accordingly.
Update: To further clarify, a Thread is just an Object in Java, ...
You can't specify target table for update in FROM clause
...Table
SET myTable.A =
(
SELECT B
FROM (SELECT * FROM myTable) AS something
INNER JOIN ...
)
This apparently causes the necessary fields to be implicitly copied into a temporary table, so it's allowed.
I found this solution here. A note from that article:
You don’t want to just ...
Recommendation for compressing JPG files with ImageMagick
...output size is bigger than the input. I don't know why, but after adding some +profile options and setting down the quality I can get an smaller size but still similar to original.
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Ways to synchronize interface and implementation comments in C# [closed]
Are there automatic ways to sync comments between an interface and its implementation?
I'm currently documenting them both and wouldn't like to manually keep them in sync.
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