大约有 16,000 项符合查询结果（耗时：0.0155秒） [XML]
Understanding colors on Android (six characters)
... And how to set textView transparency through code? I want to convert ARGB value to int, so I could use it afterwards in textView.setBackgroundColor(int color) method. Is it possible? Any other way to achieve it?
– Marek
Aug 13 '13 at 4:18
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Import a file from a subdirectory?
...nion the language shouldn't impose its way of loading files across the filesystem. In PHP we solved the problem by letting the userland code register multiple autoloading functions that are called when a namespace/class is missing. Then the community has produced the PSR-4 standard and Composer impl...
Converting Integer to String with comma for thousands
I want to convert an Integer 35634646 to have the thousand "," so it should be 35,634,646.
13 Answers
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What are the advantages of using nullptr?
...ic value whereas null pointer constants do not. A null pointer constant is converted to the null pointer of that type (whatever that is). It is required that two null pointers of the same type compare identically, and boolean conversion turns a null pointer into false. Nothing else is required. Ther...
Count occurrences of a char in plain text file
...000 occurences of the searched character:
real 0m0.089s
user 0m0.057s
sys 0m0.027s
Time for Vereb answer with echo, cat, tr and bc for the same file:
real 0m0.168s
user 0m0.059s
sys 0m0.115s
Time for Rob Hruska answer with tr, sed and wc for the same file:
real 0m0.465s
user ...
What is the best way to call a script from another script?
... to pass command-line arguments to the script, you could edit sys.argv list.
– jfs
Jan 13 '15 at 18:09
1
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e.printStackTrace equivalent in python
...immediately.
The same semantics in Python 2 are:
import traceback
import sys
try: # code that may raise an error
pass
except IOError as e: # exception handling
# in Python 2, stderr is also unbuffered
print >> sys.stderr, traceback.format_exc()
# in Python 2, you can also fr...
How do I convert Long to byte[] and back in java
How do I convert a long to a byte[] and back in Java?
12 Answers
12
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What is a “callable”?
...''called'' as a function
Example
class Foo:
def __call__(self):
print 'called'
foo_instance = Foo()
foo_instance() #this is calling the __call__ method
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Why are function pointers and data pointers incompatible in C/C++?
I have read that converting a function pointer to a data pointer and vice versa works on most platforms but is not guaranteed to work. Why is this the case? Shouldn't both be simply addresses into main memory and therefore be compatible?
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