大约有 46,000 项符合查询结果（耗时：0.0454秒） [XML]
When would I use XML instead of SQL? [closed]
...is has led me to think about the usage of XML/XSLT in general and in what situations it would be more useful than the approach I've always used, which is storing all of my data in a (My)SQL database and then using PHP/Python/etc. to work with it on the web as needed.
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Does JSON syntax allow duplicate keys in an object?
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From the standard (p. ii):
It is expected that other standards will refer to this one, strictly adhering to the JSON text format, while
imposing restrictions on various encoding details. Such standards may require specific behaviours. JSON
itself...
Show which git tag you are on?
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Edit: Jakub Narębski has more git-fu. The following much simpler command works perfectly:
git describe --tags
(Or without the --tags if you have checked out an annotated tag. My tag is lightweight, so I need the --tags.)
o...
In what cases do I use malloc and/or new?
...ou should call free and when you use the new operator you should pair with delete and it is a mistake to mix the two (e.g. Calling free() on something that was created with the new operator), but I'm not clear on when I should use malloc / free and when I should use new / delete in m...
Can I call a base class's virtual function if I'm overriding it?
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Is there any possible issues with doing this? Is it bad practice?
– Robben_Ford_Fan_boy
Feb 2 '11 at 15:01
37
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How do you determine what technology a website is built on? [closed]
Quite often I come across a nice looking or functional website, and wonder what technology was used to create it. What techniques are available to figure out what a
particular website was built with?
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Accessing class variables from a list comprehension in the class definition
How do you access other class variables from a list comprehension within the class definition? The following works in Python 2 but fails in Python 3:
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Using ZXing to create an Android barcode scanning app [duplicate]
...);
intent.putExtra("SCAN_MODE", "QR_CODE_MODE");
startActivityForResult(intent, 0);
}
};
public void onActivityResult(int requestCode, int resultCode, Intent intent) {
if (requestCode == 0) {
if (resultCode == RESULT_OK) {
String contents = intent.getStri...
Best practice for Python assert
...hanZeroException(Exception):
pass
class variable(object):
def __init__(self, value=0):
self.__x = value
def __set__(self, obj, value):
if value < 0:
raise LessThanZeroException('x is less than zero')
self.__x = value
def __get__(self, obj, ...
Breadth First Vs Depth First
...ese two terms differentiate between two different ways of walking a tree.
It is probably easiest just to exhibit the difference. Consider the tree:
A
/ \
B C
/ / \
D E F
A depth first traversal would visit the nodes in this order
A, B, D, C, E, F
Notice that you go all the w...