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Check if a string contains a string in C++
... std::cout << "found!" << '\n';
}
Note: "found!" will be printed if s2 is a substring of s1, both s1 and s2 are of type std::string.
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How to Parse Command Line Arguments in C++? [duplicate]
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introducing boost to a code base just to parse command line options is a bit "sledgehammer to crack a nut". If boost is there already use it. Otherwise have a look at something like gopt. Nothing against boost in general but ...
Good way of getting the user's location in Android
...nupdate is considered 'old' if its older than the configured
// update interval. this means, we didn't get a
// update from this provider since the last check
long old = System.currentTimeMillis() - getGPSCheckMilliSecsFromPrefs();
boolean gpsIsOld = (gpslocation.getTime() < old);...
Why should we typedef a struct so often in C?
...ce it provides a smidgen more abstraction.
Stuff like
typedef struct {
int x, y;
} Point;
Point point_new(int x, int y)
{
Point a;
a.x = x;
a.y = y;
return a;
}
becomes cleaner when you don't need to see the "struct" keyword all over the place, it looks more as if there really is a ty...
Ruby optional parameters
...ameters:
array = [1, 2, 97, 98, 99]
p array.ascii_to_text([32, 126, 1]) # Convert all ASCII values of 32-126 to their chr value otherwise keep it the same (That's what the optional 1 is for)
output: ["1", "2", "a", "b", "c"]
Okay, cool that works as planned. Now let's check and see what happens ...
Log to the base 2 in python
...n_or_method'>
String Form: <built-in function log>
Namespace: Interactive
Docstring:
log(x[, base]) -> the logarithm of x to the given base.
If the base not specified, returns the natural logarithm (base e) of x.
In [25]: math.log(8,2)
Out[25]: 3.0
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Enum ToString with user friendly strings
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I created a reverse extension method to convert the description back into an enum value:
public static T ToEnumValue<T>(this string enumerationDescription) where T : struct
{
var type = typeof(T);
if (!type.IsEnum)
throw new ArgumentExceptio...
Android: Access child views from a ListView
...nd combine with part of Feet's answer above, can give you something like:
int wantedPosition = 10; // Whatever position you're looking for
int firstPosition = listView.getFirstVisiblePosition() - listView.getHeaderViewsCount(); // This is the same as child #0
int wantedChild = wantedPosition - firs...
Functional programming - is immutability expensive? [closed]
... are a few misconceptions flying around here, I’d like to clarify some points.
The “in-place” quicksort isn’t really in-place (and quicksort is not by definition in-place). It requires additional storage in the form of stack space for the recursive step, which is in the order of O(log n) i...
Make a negative number positive
...
Just call Math.abs. For example:
int x = Math.abs(-5);
Which will set x to 5.
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