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Magic number in boost::hash_combine
...s of the old seed makes sure that, even if hash_value() has a fairly small range of values, differences will soon be spread across all the bits.
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How to remove certain characters from a string in C++?
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Here is a different solution for anyone interested. It uses the new For range in c++11
string str("(555) 555-5555");
string str2="";
for (const auto c: str){
if(!ispunct(c)){
str2.push_back(c);
}
}
str = str2;
//output: 555 5555555
cout<<str<<endl;
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.NET List Concat vs AddRange
What is the difference between the AddRange and Concat functions on a generic List? Is one recommended over the other?
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How to make an Android device vibrate?
...omplex Vibrations
There are multiple SDKs that offer a more comprehensive range of haptic feedback. One that I use for special effects is Immersion's Haptic Development Platform for Android.
Troubleshooting
If your device won't vibrate, first make sure that it can vibrate:
// Get instance of Vib...
What is the purpose of base 64 encoding and why it used in HTTP Basic Authentication?
... A-Z are 0x41 - 0x5A; in EBCDIC the letters A - Z aren't even a contiguous range: the letters A-I live at 0xC1 - 0xC9, the letters J-R live at 0xD1 - 0xD9 and the letters S-Z live at 0xE2 - 0xE9.
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Multiple variables in a 'with' statement?
... print('exit {!r}'.format(self))
return True
xs = [X() for _ in range(3)]
with ExitStack() as stack:
print(stack._exit_callbacks)
nums = [stack.enter_context(x) for x in xs]
print(stack._exit_callbacks)
print(stack._exit_callbacks)
print(nums)
Output:
deque([])
enter X1
en...
Looping over a list in Python
....
list1 = [12, 15, 22, 54, 21, 68, 9, 73, 81, 34, 45]
list2 = []
for i in range(1, len(list1)):
change = list1[i] - list1[i-1]
list2.append(change)
Note that while len(list1) is 11 (elements), len(list2) will only be 10 elements because we are starting our for loop from element with index 1 i...
How to validate an e-mail address in swift?
...: .caseInsensitive)
return regex.firstMatch(in: self, options: [], range: NSRange(location: 0, length: count)) != nil
}
}
Usage
if "rdfsdsfsdfsd".isValidEmail() {
}
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Is there common street addresses database design for all addresses of the world? [closed]
...ents such as:
Building
Sub-Building
Premise number (house number)
Premise Range
Thoroughfare
Sub-Thoroughfare
Double-Dependent Locality
Sub-Locality
Frequently only 3 address lines are used, but this is often insufficient. It is of course possible to require more lines to represent all addresses i...
How to disable a particular checkstyle rule for a particular line of code?
...nfig_filters.html#SuppressionFilter
The drawback of this is that the line range is stored in a separate suppresssions.xml file, so an unfamiliar developer may not immediately make the connection.
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