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Fast permutation -> number -> permutation mapping algorithms
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* There is very limited error checking in this class
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* Especially the int PermGetIndex(int[] iInputArray) method
* if the input integer array contains invalid index, it WILL crash the system
*
* the other is the string of symbol pass in whe...
Useless use of cat?
...o grep screws up reusability, and quite possibly do so silently without an error message if the file argument exists. I. e. grep foo xyz | grep bar xyz | wc will give you how many lines in xyz contain bar while you are expecting the number of lines that contain both foo and bar. Having to change arg...
Is there a portable way to print a message from the C preprocessor?
...r versions - #warning is not going to be great, as warnings are treated as errors for us generally, and we'd really like the message to be informational, rather than stop the compilation.
– Danny S
Mar 23 '15 at 4:10
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What is the (function() { } )() construct in JavaScript?
...ser, we can determine these phases in our code by watching out for parsing errors, hoisting and run time errors. I personally haven't found many resources on this because it's too low level and it's not something that the programmer can control. You can find some sort of explanation in this SO post:...
Purge or recreate a Ruby on Rails database
...l also need to run rake db:test:prepare for testing, or else you'll get an error like: Could not find table 'things' (ActiveRecord::StatementInvalid)
– s2t2
Feb 17 '13 at 1:49
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Locking pattern for proper use of .NET MemoryCache
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While its true that Lazy<T> can return an error if the initialization exception fails, that is a pretty easy thing to detect. You can then evict any Lazy<T> that resolves to an error from the cache, create a new Lazy<T>, put that in the cache, and resolve...
What is the difference between ng-if and ng-show/ng-hide
...nce I could reference to a null image name variable and that will throw an error but if I ng-if and check if it's null, it's all good. If I did an ng-show, the error would still fire.
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Using Node.JS, how do I read a JSON file into (server) memory?
... {
const obj = JSON.parse(contents)
console.log(obj)
})
.catch(error => {
throw error
})
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How to execute a MySQL command from a shell script?
...base-name" < "filename.sql"
Enter password: <you type it in here>
ERROR 1049 (42000): Unknown database 'XXXXXXXX'
Actually, I prefer to store the user and password in ~/.my.cnf so I don't have to put it on the command-line at all:
[client]
user = root
password = XXXXXXXX
Then:
$ mysql...
“Connection for controluser as defined in your configuration failed” with phpMyAdmin in XAMPP
I have just installed XAMPP on my Windows XP machine, and I get an error saying:
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