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When is CRC more appropriate to use than MD5/SHA1?
...from network interference, line noise, distortion, etc.
CRC is computationally much less complex than MD5 or SHA1. Using a hash function like MD5 is probably overkill for random error detection. However, using CRC for any kind of security check would be much less secure than a more complex hashing ...
fastest MD5 Implementation in JavaScript
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"In order to make my JavaScript MD5 code faster than everyone else's, I had to take advantage of local function variables." What a breakthrough!
– Glenn Maynard
Dec 16 '10 at 7:12
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“Incorrect string value” when trying to insert UTF-8 into MySQL via JDBC?
...s affected (0.01 sec)
In short I had to reduce the size of that field in order to get the update to work.
Now when I run:
mysql> ALTER TABLE user CONVERT TO CHARACTER SET utf8mb4;
Query OK, 5 rows affected (0.01 sec)
Records: 5 Duplicates: 0 Warnings: 0
It all works
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How to merge YAML arrays?
...l caveats to YAML anchors and aliases apply for uniqueness and declaration order
Conclusion
This approach allows creation of merged lists by use of the alias and anchor feature of YAML.
Although the output result is a nested list of lists, this can be easily transformed using the flatten method....
Citing the author of a blockquote using Markdown syntax
...ld like to have the quote followed by a citation beneath it, but right now all it does is blockquote the whole line. How does one do this in markdown syntax?
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How to sort my paws?
...ally going to use both in different ways.
Use the (temporal and spatial) order of the paw impacts to determine which paw is which.
Try to identify the "pawprint" based purely on its shape.
Basically, the first method works with the dog's paws follow the trapezoidal-like pattern shown in Ivo's qu...
How to change the CHARACTER SET (and COLLATION) throughout a database?
...the utf8 character set is only a subset of the real UTF8 character set. In order to save one byte of storage, the Mysql team decided to store only three bytes of a UTF8 characters instead of the full four-bytes. That means that some east asian language and emoji aren't fully supported. To make sure ...
Are there conventions on how to name resources?
... I do this to, only I'd rather shorten the layout and widget names, in order to avoid long names, for example the username edit box on authentication layout would be: "au_eb_username" instead of "authentication_editbox_username"
– Hossein Shahdoost
Apr 22 '...
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar
...ou just want to filter down the table and maintain all other aspects (sort order, cell layout, etc.) of the search results.
First, define two properties in your UITableViewController subclass (with the appropriate @synthesize and dealloc, if applicable):
@property (nonatomic, retain) UISearchDispl...
Python matplotlib multiple bars
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