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What is the most efficient way to store a list in the Django models?
Currently I have a lot of python objects in my code similar to the following:
12 Answers
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How do I call setattr() on the current module?
...ables when called in a function, and then it must be treated as R/O -- the Python online docs can be a bit confusing about this specific distinction).
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Python __call__ special method practical example
...torial function that contains a static variable (as that's not possible in Python).
class Factorial:
def __init__(self):
self.cache = {}
def __call__(self, n):
if n not in self.cache:
if n == 0:
self.cache[n] = 1
else:
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Programmatically set height on LayoutParams as density-independent pixels
... set the width/height of an ImageView using the method above vs. using the xml. In the XML I set 85dp while the method above needs "75" to produce the same size. Any idea why?
– Dirk
Sep 18 '14 at 23:26
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How to break/exit from a each() function in JQuery? [duplicate]
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According to the documentation you can simply return false; to break:
$(xml).find("strengths").each(function() {
if (iWantToBreak)
return false;
});
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How to print a linebreak in a python function?
I have a list of strings in my code;
8 Answers
8
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Reading specific lines only
... 29:
break
fp.close()
Note that i == n-1 for the nth line.
In Python 2.6 or later:
with open("file") as fp:
for i, line in enumerate(fp):
if i == 25:
# 26th line
elif i == 29:
# 30th line
elif i > 29:
break
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Do you need to close meta and link tags in HTML?
...ule by even formally allowing the / in HTML serialization, too.
In XHTML, XML rules apply, so every element, without exception, must have both a start tag and an end tag, but the same tag may be used for both roles if the element content is empty, e.g. <meta name="foo" content="bar"/> as shor...
How do I check if a string is a number (float)?
...e best possible way to check if a string can be represented as a number in Python?
33 Answers
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Smarty中date_format日期格式化详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...45763672
//可知strtotime('now')返回的是时间戳
//也可是从数据库得到的时间戳
$time = time();
echo 'php格式化输出:<br />';
echo '昨天：'.date('Y-m-d H:i:s', strtotime('-1 day')).'<br />';
//date('Y-m-d H:i:s'),不写第二个参数，默认为当前时间...