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How to convert a number to string and vice versa in C++
...the following functions are present in <string> (as per paragraph 21.5).
string to numeric
float stof(const string& str, size_t *idx = 0);
double stod(const string& str, size_t *idx = 0);
long double stold(const string& str, size_t *idx = 0);
int ...
Multiple INSERT statements vs. single INSERT with multiple VALUES
...et the average compile time per clause. The results are below
Up until 250 VALUES clauses present the compile time / number of clauses has a slight upward trend but nothing too dramatic.
But then there is a sudden change.
That section of the data is shown below.
+------+----------------+---...
What's the best way to communicate between view controllers?
...p.
– Kevin Elliott
Jan 10 '10 at 0:05
What if you also wish to use BookPickerController for picking a book for a wish ...
How to programmatically display version/build number of target in iOS app?
...naryKey("CFBundleShortVersionString") as! String
Swift 3.0+ (tested with 5.0):
let appVersionString: String = Bundle.main.object(forInfoDictionaryKey: "CFBundleShortVersionString") as! String
To get the build number:
Objective-C:
NSString * appBuildString = [[NSBundle mainBundle] objectForInf...
grep a file, but show several surrounding lines?
...
answered Aug 12 '08 at 17:57
Pat NotzPat Notz
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Getting name of the class from an instance
... CiNNCiNN
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33
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Comparing Haskell's Snap and Yesod web frameworks
...deal.
– Dan Burton
Apr 13 '11 at 19:57
2
Yesod also has an as-yet-unreleased interface to mongodb...
Append a NumPy array to a NumPy array
...
In [1]: import numpy as np
In [2]: a = np.array([[1, 2, 3], [4, 5, 6]])
In [3]: b = np.array([[9, 8, 7], [6, 5, 4]])
In [4]: np.concatenate((a, b))
Out[4]:
array([[1, 2, 3],
[4, 5, 6],
[9, 8, 7],
[6, 5, 4]])
or this:
In [1]: a = np.array([1, 2, 3])
In [2]: b = ...
How do you add an array to another array in Ruby and not end up with a multi-dimensional result?
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answered Nov 26 '09 at 5:09
pilcrowpilcrow
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