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What is the difference between range and xrange functions in Python 2.X?
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In Python 2.x:
range creates a list, so if you do range(1, 10000000) it creates a list in memory with 9999999 elements.
xrange is a sequence object that evaluates lazily.
In Python 3, range does the equivalent of python's xrange, and to get the list, you have to use list(rang...
Why does string::compare return an int?
...like short or char ? My understanding is that this method only returns -1, 0 or 1.
9 Answers
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MFC CString::Format()函数详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...，
但并不多用，所以这里只对第一个介绍）
参数：
1、Format参数是一个格式字符串，用于格式化Args里面的值的。格式字符串中包含了一个或多个以%字符开始的格式指令，我们通过这些格式指令来编译器如何对Args里面的值进...
How to overcome TypeError: unhashable type: 'list'
...ue = [x.strip() for x in line]
key = line[0].strip()
value = line[1].strip()
# Now we check if the dictionary contains the key; if so, append the new value,
# and if not, make a new list that contains the current value
# (For future reference, this is a great place for a default...
How do I parse a string to a float or int?
...222" to its corresponding float value, 545.2222 ? Or parse the string "31" to an integer, 31 ?
28 Answers
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How do you remove a specific revision in the git history?
...ks more or less like this:
pick deadbee The oneline of this commit
pick fa1afe1 The oneline of the next commit
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The oneline descriptions are purely for your pleasure; git-rebase will not look at them but at the commit names ("deadbee" and "fa1afe1" in this example), so do not delete or edit the...
Is Big O(logn) log base e?
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edited Feb 15 '10 at 5:23
community wiki
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How can I make my flexbox layout take 100% vertical space?
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You should set height of html, body, .wrapper to 100% (in order to inherit full height) and th...
How to make IPython notebook matplotlib plot inline
...am trying to use IPython notebook on MacOS X with Python 2.7.2 and IPython 1.1.0.
10 Answers
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