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Interpolating a string into a regex
...
Same as string insertion.
if goo =~ /#{Regexp.quote(foo)}/
#...
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Get class name of object as string in Swift
...e.self)
String from a type:
String(describing: self)
Example:
struct Foo {
// Instance Level
var typeName: String {
return String(describing: Foo.self)
}
// Instance Level - Alternative Way
var otherTypeName: String {
let thisType = type(of: self)
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Dynamically set local variable [duplicate]
...u cannot modify locals() directly and expect it to work.
>>> def foo():
lcl = locals()
lcl['xyz'] = 42
print(xyz)
>>> foo()
Traceback (most recent call last):
File "<pyshell#6>", line 1, in <module>
foo()
File "<pyshell#5>", line 4, in foo
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Use of 'const' for function parameters
... need to know anything on what you do (internally) with it. So write class Foo { int multiply(int a, int b) const; } in your header. In your implementation you do care that you can promise not to alter a and b so int Foo::multiply(const int a, const int b) const { } makes sense here. (Sidenote: both...
How can you use an object's property in a double-quoted string?
... in a double-quoted string it will be replaced by that variable's value:
$foo = 2
"$foo"
becomes
"2"
If you don't want that you have to use single quotes:
$foo = 2
'$foo'
However, if you want to access properties, or use indexes on variables in a double-quoted string, you have to enclose th...
Efficiently updating database using SQLAlchemy ORM
...n your session.
So if you say
for c in session.query(Stuff).all():
c.foo = c.foo+1
session.commit()
it will do what it says, go fetch all the objects from the database, modify all the objects and then when it's time to flush the changes to the database, update the rows one by one.
Instead y...
How to replace strings containing slashes with sed?
...not part of either string. Or, you could escape it with a backslash:
s/\//foo/
Which would replace / with foo. You'd want to use the escaped backslash in cases where you don't know what characters might occur in the replacement strings (if they are shell variables, for example).
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What's the Linq to SQL equivalent to TOP or LIMIT/OFFSET?
...
In VB:
from m in MyTable
take 10
select m.Foo
This assumes that MyTable implements IQueryable. You may have to access that through a DataContext or some other provider.
It also assumes that Foo is a column in MyTable that gets mapped to a property name.
See http...
How do I load the contents of a text file into a javascript variable?
I have a text file in the root of my web app http://localhost/foo.txt and I'd like to load it into a variable in javascript.. in groovy I would do this:
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How ViewBag in ASP.NET MVC works
... Object , which intrigues me, how does "Magic" properties such as ViewBag.Foo and magic strings ViewBag["Hello"] actually work?
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