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Stack vs heap allocation of structs in Go, and how they relate to garbage collection
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What is the difference between shallow copy, deepcopy and normal assignment operation?
...list, but inner lists are references.
Assignment does not copy. It simply sets the reference to the old data. So you need copy to create a new list with the same contents.
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Copy object values in Visual Studio debug mode
...e} is {Age} years old")]
public class Person
{
public string Name { get; set; }
public int Age { get; set; }
}
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How do you compare structs for equality in C?
... if the 2 structures variable are initialied with calloc or they are set with 0 by memset so you can compare your 2 structures with memcmp and there is no worry about structure garbage and this will allow you to earn time
– MOHAMED
Oct 3 '12 at 9:09
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What do numbers using 0x notation mean?
...representation though, I guess similar to if we would agree that we have a set of numbers from 0--999 and that 1000--1999 would represent the negative numbers. My question was about human-readable notation, though knowing how computers do it might help someone else, so thanks :)
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what is the difference between GROUP BY and ORDER BY in sql
... and aren't really related at all.
ORDER BY allows you to sort the result set according to different criteria, such as first sort by name from a-z, then sort by the price highest to lowest.
(ORDER BY name, price DESC)
GROUP BY allows you to take your result set, group it into logical groups and t...
Is there any overhead to declaring a variable within a loop? (C++)
... find out, by looking at what the compiler does (even without optimisation set to high):
Look at what the compiler (gcc 4.0) does to your simple examples:
1.c:
main(){ int var; while(int i < 100) { var = 4; } }
gcc -S 1.c
1.s:
_main:
pushl %ebp
movl %esp, %ebp
subl $24...
Get name of current script in Python
...ed in the interactive interpreter, because it is meaningless there. It is set by the import implementation, so if you use a non-standard import mechanism it might also be unset.
– Sven Marnach
May 3 '13 at 19:18
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How can I reorder my divs using only CSS?
... Should be noted that this does not work with floats. You have to set the float:none; if you already had a float set.
– Thomas
Aug 14 '14 at 17:22
5
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Adding new column to existing DataFrame in Python pandas
...m.randn(sLength), index=df1.index)
Edit 2015
Some reported getting the SettingWithCopyWarning with this code.
However, the code still runs perfectly with the current pandas version 0.16.1.
>>> sLength = len(df1['a'])
>>> df1
a b c d
6 -0.26922...