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What's the difference between HEAD^ and HEAD~ in Git?
...f thumb
Use ~ most of the time — to go back a number of generations, usually what you want
Use ^ on merge commits — because they have two or more (immediate) parents
Mnemonics:
Tilde ~ is almost linear in appearance and wants to go backward in a straight line
Caret ^ suggests an interesting s...
Storing Data in MySQL as JSON
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Yeah, im looking at Mongo, and php has an extension for it and the actual syntax for the DB transactions seems easier than MySQL and the overall working with it seems easier that couchDB. Thanks, I think im going to go with MongoDB :)
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Show a popup/message box from a Windows batch file
...re some amazing examples of things you can do: dostips.com/forum/viewtopic.php?t=5311 The LocalDateTime example returns a value. Thanks for the idea!
– Jerry Jeremiah
May 26 '16 at 5:06
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PHP - iterate on string characters
...ated array
foreach ($array as $char) {
echo $char;
}
You can check the PHP docs for more information: str_split
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Pickle or json?
I need to save to disk a little dict object whose keys are of the type str and values are int s and then recover it . Something like this:
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How to remove extension from string (only real extension!)
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http://php.net/manual/en/function.pathinfo.php
$filename = pathinfo('filename.md.txt', PATHINFO_FILENAME); // returns 'filename.md'
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LINQ order by null column where order is ascending and nulls should be last
I'm trying to sort a list of products by their price.
10 Answers
10
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SHA1 vs md5 vs SHA256: which to use for a PHP login?
I'm making a php login, and I'm trying to decide whether to use SHA1 or Md5, or SHA256 which I read about in another stackoverflow article. Are any of them more secure than others? For SHA1/256, do I still use a salt?
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How are virtual functions and vtable implemented?
...eturn 1; } };
struct Bar: public Foo { int a() { return 2; } };
void f(Foo& arg) {
Foo x; x.a(); // non-virtual: always calls Foo::a()
Bar y; y.a(); // non-virtual: always calls Bar::a()
arg.a(); // virtual: must dispatch via vtable
Foo z = arg; // copy constructor Foo::Foo(const F...
How can I initialize base class member variables in derived class constructor?
...ince it would destroy encapsulation. Instead, create a constructor in A to allow B (or any subclass of A) to initialize them:
class A
{
protected:
A(int a, int b) : a(a), b(b) {} // Accessible to derived classes
// Change "protected" to "public" to allow others to instantiate A.
private:
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