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UnicodeDecodeError when redirecting to file
... which is not always its number of user-perceived characters: thus s = "\u1100\u1161\u11a8"; print(s, "len", len(s)) (Python 3) gives 각 len 3 despite s having a single user-perceived (Korean) character (because it is represented with 3 code points—even if it does not have to, as print("\uac01")...
Check if a given key already exists in a dictionary
...e intended way to test for the existence of a key in a dict.
d = {"key1": 10, "key2": 23}
if "key1" in d:
print("this will execute")
if "nonexistent key" in d:
print("this will not")
If you wanted a default, you can always use dict.get():
d = dict()
for i in range(100):
key = i % ...
How can I get a list of build targets in Ant?
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answered Oct 12 '10 at 10:30
GrodriguezGrodriguez
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How do I make an HTML text box show a hint when empty?
...was added in 3.7. Chrome is fine. Internet Explorer only added support in 10. If you target a browser that does not support input placeholders, you can use a jQuery plugin called jQuery HTML5 Placeholder, and then just add the following JavaScript code to enable it.
$('input[placeholder], textarea...
What is the theoretical maximum number of open TCP connections that a modern Linux box can have
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answered Feb 25 '10 at 9:01
WillWill
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How to uncheck a radio button?
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answered Jan 22 '10 at 13:47
David HedlundDavid Hedlund
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Data structure: insert, remove, contains, get random element, all at O(1)
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Nick Heiner
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answered Apr 16 '11 at 6:21
r0u1ir0u1i...
Invoking a static method using reflection
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answered Mar 18 '10 at 4:41
Adeel AnsariAdeel Ansari
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CMake: Print out all accessible variables in a script
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squareskittles
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answered Feb 17 '12 at 12:51
sakrasakra
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How can I rollback a github repository to a specific commit?
My github has 100 commits in it right now. I need to rollback the repository to commit 80, and remove all the subsequent ones.
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