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Using -performSelector: vs. just calling the method
...s explained in a previous answer. For example
SEL method = NSSelectorFromString([NSString stringWithFormat:@"doSomethingWithMy%@:", @"Age");
[object performSelector:method];
The other use, is to asynchronously dispatch a message to object, that will be executed later on the current runloop. For ...
PDO's query vs execute
...are on the : calories is that kind of the equivalent of mysql_real_escape_string() to stop injections or do you need more than just $sth->bindParam(':calories', $calories); to heighten security?
– Dan
Jan 5 '12 at 12:52
...
Difference: std::runtime_error vs std::exception()
...
std::runtime_error on the other hand has valid constructors that accept a string as a message. When what() is called a const char pointer is returned that points at a C string that has the same string as was passed into the constructor.
try
{
if (badThingHappened)
{
throw std::run...
How do I look inside a Python object?
...
the best way to see object and its contents in a string
– Peter Krauss
Dec 28 '19 at 21:57
T...
How to find out element position in slice?
... }
}
return -1
}
And usage:
xs := []int{2, 4, 6, 8}
ys := []string{"C", "B", "K", "A"}
fmt.Println(
SliceIndex(len(xs), func(i int) bool { return xs[i] == 5 }),
SliceIndex(len(xs), func(i int) bool { return xs[i] == 6 }),
SliceIndex(len(ys), func(i int) bool { return ys[i]...
How to merge a specific commit in Git
...build process takes advantage of git ancestry to automatically set version strings based on the latest tag (using git describe).
Instead of cherry-pick, you can do an actual git merge --no-commit, and then manually adjust the index to remove any changes you don't want.
Suppose you're on branch A a...
Rails migrations: self.up and self.down versus change
...d only delete this column on down
def up
add_column :users, :location, :string
User.update_all(location: 'Minsk')
end
def down
remove_column :users, :location
end
But:
You had to avoid using change method which allows to save some time. For example, if you didn’t need to update column v...
Calling constructor from other constructor in same class
... the constructor to do 'constructor chaining'
public Test( bool a, int b, string c )
: this( a, b )
{
this.m_C = c;
}
public Test( bool a, int b, float d )
: this( a, b )
{
this.m_D = d;
}
private Test( bool a, int b )
{
this.m_A = a;
this.m_B = b;
}
Source Courtesy of csh...
How to remove an item from an array in AngularJS scope?
...tion above - being - delete({{$index}}) with the {{ }} otherwise I got the string $index - BUT I have something wrong because it never calls that method. It does when I remove any mention of the index like delete() but that doesn't really help.
– mikemil
Oct 2...
HTML.ActionLink vs Url.Action in ASP.NET Razor
...ormMethod.Get))
{
<p>
Find by Name: @Html.TextBox("SearchString", ViewBag.CurrentFilter as string)
<input type="submit" value="Search" />
<input type="button" value="Clear" onclick="location.href='@Url.Action("Index","Company")'"/>
</p>
}
In ...