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How can I safely encode a string in Java to use as a filename?
...ot something to copy and paste.)
char fileSep = '/'; // ... or do this portably.
char escape = '%'; // ... or some other legal char.
String s = ...
int len = s.length();
StringBuilder sb = new StringBuilder(len);
for (int i = 0; i < len; i++) {
char ch = s.charAt(i);
if (ch < ' ' || c...
How to show Page Loading div until the page has finished loading?
...load). You'd do something like this:
$(document).ready( function() {
$('table#with_slow_data').show();
$('div#loading image or text').hide();
});
What's the difference between echo, print, and print_r in PHP?
...ing
No return value
var_export()
Outputs a human-readable and PHP-executable representation of any one value
Accepts not just strings but other types including arrays and objects, formatting them to be readable
Uses a different output format to both print_r() and var_dump() - resulting output is...
What is the difference between Caching and Memoization?
...d like to add to the other great answers that memoization is also known as tabling. I think it is also important to know that term for those who learn what memoization and caching are.
share
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impr...
NSOperation vs Grand Central Dispatch
...les: bandwidth-constrained queues that only run N operations at a time; establishing dependencies between operations. Both very simple with NSOperation, very difficult with GCD.) Apple's done the hard work of leveraging GCD to create a very nice object-friendly API with NSOperation. Take advantage ...
What are the differences between the BLOB and TEXT datatypes in MySQL?
...cause in memory calculating, varchar is really simple, for example create table website( website_name varchar(30) ) and then we fill the website_name "stackoverflow" so the memory needed is 13byte
– nencor
Jul 24 '12 at 9:36
...
How to change field name in Django REST Framework
... blank=True)
objects = models.GeoManager()
class Meta:
db_table = u'p_park'
def __unicode__(self):
return '%s' % self.name
Here is Serializer for Park Model, ParkSerializer. This changes the name of alternate_name to location.
class ParkSerializer(serializers.ModelS...
How does std::forward work? [duplicate]
...thing using another mysterious thing. This particular cast is defined by a table in Xeo's answer. But the question is: Why? So here's my understanding:
Suppose I want to pass you an std::vector<T> v that you're supposed to store in your data structure as data member _v. The naive (and safe) s...
IEnumerable vs List - What to Use? How do they work?
...spotted would have to be returned to run Feline. On the other hand an IQuertable<T> will allow the query to be refined, pulling down only Spotted Felines.
– Nate
Aug 20 '14 at 17:49
...
Token Authentication for RESTful API: should the token be periodically changed?
...
Also, you could expire tokens from the table by evicting old ones periodically in a cronjob (Celery Beat or similar), instead of intercepting the validation
– BjornW
Mar 15 '19 at 15:14
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