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Fastest way to check if string contains only digits
...point. I also wrote a similar answer (see below) a few years ago, although my version just tested if the char was between '0' and '9' to eliminate chars from other locales. That will depend on the exact requirements.
– Stephen Holt
Sep 18 '18 at 9:29
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Flat file databases [closed]
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In my opinion, using a "Flat File Database" in the sense you're meaning (and the answer you've accepted) isn't necessarily the best way to go about things. First of all, using serialize() and unserialize() can cause MAJOR headac...
Unique fields that allow nulls in Django
... # otherwise, just pass the value
return value
For my project, I dumped this into an extras.py file that lives in the root of my site, then I can just from mysite.extras import CharNullField in my app's models.py file. The field acts just like a CharField - just remember to ...
Change a Git remote HEAD to point to something besides master
...ed
$ git-update-server-info
$ rsync -az .git/* server:/local_path_to/git/myRepo.git/
But that would involve write access to the server, which is not always possible.
As I explain in "Git: Correct way to change Active Branch in a bare repository?", git remote set-head wouldn't change anything on ...
How to initialize a private static const map in C++?
...[5] = 6;
return m;
}
static const map<int,int> myMap;
};
const map<int,int> A:: myMap = A::create_map();
int main() {
}
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How to initialize private static members in C++?
...t way to initialize a private, static data member in C++? I tried this in my header file, but it gives me weird linker errors:
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Write a function that returns the longest palindrome in a given string
...d the inner while loop is O(n) (max around (n / 2) - 1 iterations)
Here's my Java implementation using the example provided by other users.
class LongestPalindrome {
/**
* @param input is a String input
* @return The longest palindrome found in the given input.
*/
public st...
Is there a way to check if int is legal enum in C#?
...
Check out Enum.IsDefined
Usage:
if(Enum.IsDefined(typeof(MyEnum), value))
MyEnum a = (MyEnum)value;
This is the example from that page:
using System;
[Flags] public enum PetType
{
None = 0, Dog = 1, Cat = 2, Rodent = 4, Bird = 8, Reptile = 16, Other = 32
};
public c...
Using PassportJS, how does one pass additional form fields to the local authentication strategy?
...ng to supply more than just req.body.username and req.body.password to my authentication strategy (passport-local).
2 ...
Issue with adding common code as git submodule: “already exists in the index”
...question to be certain about what's going on, since you haven't replied to my follow-up question, but this may be of help in any case.
That error means that projectfolder is already staged ("already exists in the index"). To find out what's going on here, try to list everything in the index under ...