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Difference between std::result_of and decltype
I have some trouble understanding the need for std::result_of in C++0x. If I understood correctly, result_of is used to obtain the resulting type of invoking a function object with certain types of parameters. For example:
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Regular expression to check if password is “8 characters including 1 uppercase letter, 1 special cha
...pecified.
– npinti
Feb 28 '12 at 7:50
35
+1 Regex is powerful, but wasn't meant to solve any prob...
How to group dataframe rows into list in pandas groupby?
...'A','A','B','B','B','C'], 'b':[1,2,5,5,4,6]})
df
Out[1]:
a b
0 A 1
1 A 2
2 B 5
3 B 5
4 B 4
5 C 6
In [2]: df.groupby('a')['b'].apply(list)
Out[2]:
a
A [1, 2]
B [5, 5, 4]
C [6]
Name: b, dtype: object
In [3]: df1 = df.groupby('a')['b'].apply(list).reset_in...
Perform an action in every sub-directory using Bash
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answered Oct 22 '10 at 20:29
Mike ClarkMike Clark
10.7k66 gold badges3434 silver badges4242 bronze badges
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Rails: create on has_one association
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edited May 9 '12 at 14:07
answered Oct 1 '10 at 13:59
se...
Vim: What's the difference between let and set?
...lar to "ordinary" variables). So, the following are equivalent:
:set tw=40
:let &tw=40
But, for example, assigning 50 to the global variable foo (:let g:foo=50) cannot be achieved with a :set command (because g:foo is a variable and not an option).
Some options are boolean like. When settin...
Android: When is onCreateOptionsMenu called during Activity lifecycle?
...Ware
873k161161 gold badges21332133 silver badges21602160 bronze badges
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ReferenceError: event is not defined error in Firefox
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edited May 10 '16 at 11:44
answered Dec 11 '13 at 15:23
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How to use regex in String.contains() method in Java
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edited May 23 '17 at 12:10
Community♦
111 silver badge
answered Feb 28 '13 at 8:01
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Possible to make labels appear when hovering over a point in matplotlib?
...cmap = plt.cm.RdYlGn
fig,ax = plt.subplots()
sc = plt.scatter(x,y,c=c, s=100, cmap=cmap, norm=norm)
annot = ax.annotate("", xy=(0,0), xytext=(20,20),textcoords="offset points",
bbox=dict(boxstyle="round", fc="w"),
arrowprops=dict(arrowstyle="->"))
annot.s...