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When should one use HTML entities?
... entities.
Some libraries do not play along nice with utf-8. For instance, PHP in some Linux distributions dropped full support for utf-8 in their regular expression libraries.
It is harder to limit the number of characters in a text that uses html entities, because a single entity uses many charact...
Does MS SQL Server's “between” include the range boundaries?
...d you also don't want to CONVERT a datetime to a date, as that will render indexes useless. Use the standard WHERE OrderDate >= '20160601' AND OrderDate < '20160701'. Also, be sure to use yyyymmdd, as yyyy-mm-dd is locale dependent, and will be misinterpreted depending on your server's mdy, dm...
How can I call controller/view helper methods from the console in Ruby on Rails?
...s on your routes, e.g. could be /users/all and map to Api::UsersController#index :)
– Dorian
Apr 25 '17 at 21:55
@Dori...
Why is iterating through a large Django QuerySet consuming massive amounts of memory?
...der
eids = Event.objects.order_by("-id").values_list("id", flat=True)
for index, eid in enumerate(eids):
event = Event.object.get(id=eid)
# do necessary work with event
if index % 100 == 0:
gc.collect()
print("completed 100 items")
values_list can be used to fetch all th...
How do I initialize an empty array in C#?
... has no elements. If you try to access emptyStringArray[0], you will get a IndexOutOfRangeException
– Oded
Sep 27 '13 at 14:25
...
What does it mean when MySQL is in the state “Sending data”?
...ory) which is yet to be read and sent over. It may be the table itself, an index, a temporary table, a sorted output etc.
If you have a 1M records table (without an index) of which you need only one record, MySQL will still output the status as "sending data" while scanning the table, despite the f...
In-memory size of a Python structure
...p.heap()
Partition of a set of 25853 objects. Total size = 3320992 bytes.
Index Count % Size % Cumulative % Kind (class / dict of class)
0 11731 45 929072 28 929072 28 str
1 5832 23 469760 14 1398832 42 tuple
2 324 1 277728 8 1676560 50 dict (n...
Condition within JOIN or WHERE
...ditions in join improve performance for large amount of data with properly indexed tables.
– Shahdat
Oct 6 '16 at 15:13
...
Reason to Pass a Pointer by Reference in C++?
...n fact natural) signature for this would be const T &operator[](size_t index) const. But you could also have T &operator[](size_t index). You could have both at the same time. The latter would let you do things like myArray[jj] = 42. At the same time, you aren't providing a pointer to your d...
ERROR 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)
...authentication_string" Here you can read more about it: bugs.mysql.com/bug.php?id=76655
– IberoMedia
Feb 4 '18 at 17:05
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