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Scala 2.8 breakOut
...hat would produce an intermediary List[(Int, String)] collection, and then convert it.
Given that map uses a Builder to produce the resulting collection, wouldn't it be possible to skip the intermediary List and collect the results directly into a Map? Evidently, yes, it is. To do so, however, we n...
Compression/Decompression string with C#
... doing compression and decompression string in C#. There is a XML and I am converting in string and after that I am doing compression and decompression.There is no compilation error in my code except when I decompression my code and return my string, its returning only half of the XML.
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如何查看Oracle用户的SQL执行历史记录？ - 数据库(内核) - 清泛网 - 专注C/...
...privs; 授予用户和其他角色的角色
select * from dba_sys_privs; 授予用户和其他角色的系统权限
select * from dba_tab_privs; 数据库中对象的所有授权
select * from user_role_privs; 查看当前用户的角色
清泛网注...
How to sum all the values in a dictionary?
...alues of the dictionary's keys, a utility function can be helpful:
import sys
def itervalues(d):
return iter(getattr(d, ('itervalues', 'values')[sys.version_info[0]>2])())
sum(itervalues(d))
This is essentially what Benjamin Peterson's six module does.
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How to check Django version
...
For Python:
import sys
sys.version
For Django (as mentioned by others here):
import django
django.get_version()
The potential problem with simply checking the version, is that versions get upgraded and so the code can go out of date. You w...
What's the difference between a Python module and a Python package?
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@Jacquot sure, see The import system in the reference documentation: It’s important to keep in mind that all packages are modules.
– Martijn Pieters♦
Apr 23 '18 at 21:42
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ValueError: setting an array element with a sequence
...2,3]) #good
numpy.array([1, (2,3)]) #Fail, can't convert a tuple into a numpy
#array element
numpy.mean([5,(6+7)]) #good
numpy.mean([5,tuple(range(2))]) #Fail, can't convert a tuple into a numpy
...
hexadecimal string to byte array in python
...ex string that represents a series of values of different types. I wish to convert this Hex String into a byte array so that I can shift each value out and convert it into its proper data type.
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How do I get whole and fractional parts from double in JSP/Java?
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Converting double to int is almost always a bad idea. Because e.g. for (long)1.0e100 you will get 0. A lot of the times you need the double value simply "floored" for which there is floor(). If you want both integral and frac...
Passing variable number of arguments around
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To pass the ellipses on, you have to convert them to a va_list and use that va_list in your second function. Specifically;
void format_string(char *fmt,va_list argptr, char *formatted_string);
void debug_print(int dbg_lvl, char *fmt, ...)
{
char formatt...