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What is the difference between char, nchar, varchar, and nvarchar in SQL Server?
...in most cases, better collation, flexibility for the users, removes future compatibility issues. And by the way storage space is not an issue for this case, as using collation without Unicode is a lot of hassle, and memory rates will continue to decrease in future
– Jaison Varg...
Is there a typical state machine implementation pattern?
...ended to support multiple state machines, etc. Transition actions can be accommodated as well:
typedef void transition_func_t( instance_data_t *data );
void do_initial_to_foo( instance_data_t *data );
void do_foo_to_bar( instance_data_t *data );
void do_bar_to_initial( instance_data_t *data );
voi...
Proper use of beginBackgroundTaskWithExpirationHandler
... to start the network operation. If you just want an existing operation to complete, as per @Eyal's question, you don't need to do anything in applicationDidEnterBackground
– Ashley Mills
Aug 3 '12 at 20:03
...
How to encrypt/decrypt data in php?
... from a reliable random number generator. The following example would be recommended (>= 5.3):
$key_size = 32; // 256 bits
$encryption_key = openssl_random_pseudo_bytes($key_size, $strong);
// $strong will be true if the key is crypto safe
This can be done once or multiple times (if you wish t...
Append column to pandas dataframe
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Unbound classpath container in Eclipse
...
Import the project's files without the "project file"
Install JDK1.5 from http://java.sun.com/javase/downloads/index_jdk5.jsp and see whether you can fix paths
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Good ways to sort a queryset? - Django
...jango 1.4 and newer you can order by providing multiple fields.
Reference: https://docs.djangoproject.com/en/dev/ref/models/querysets/#order-by
order_by(*fields)
By default, results returned by a QuerySet are ordered by the ordering tuple given by the ordering option in the model’s Meta. You can...
Connect Java to a MySQL database
...attern for the DB connection is a bad approach. See among other questions: http://stackoverflow.com/q/9428573/. This is a #1 starters mistake.
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Pass Array Parameter in SqlCommand
... This is wrong approach, Table-Valued parameter should be used https://stackoverflow.com/a/10409710/1565525
– Fabio
Aug 25 '17 at 14:14
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Best way to replace multiple characters in a string?
... text = text.replace(ch,"\\"+ch)
import re
def c(text):
rx = re.compile('([&#])')
text = rx.sub(r'\\\1', text)
RX = re.compile('([&#])')
def d(text):
text = RX.sub(r'\\\1', text)
def mk_esc(esc_chars):
return lambda s: ''.join(['\\' + c if c in esc_chars else c for...