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Access Container View Controller from Parent iOS
...the new Container View but am not quite sure how to access it's controller from the containing view.
11 Answers
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Ruby: Calling class method from instance
In Ruby, how do you call a class method from one of that class's instances? Say I have
9 Answers
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How to remove leading zeros from alphanumeric text?
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You can use the StringUtils class from Apache Commons Lang like this:
StringUtils.stripStart(yourString,"0");
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Redirect stdout to a file in Python?
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It doesn't work with from sys import stdout, maybe because it creates a local copy. Also you can use it with with, e.g. with open('file', 'w') as sys.stdout: functionThatPrints(). You can now implement functionThatPrints() using normal print stat...
Remove excess whitespace from within a string
I receive a string from a database query, then I remove all HTML tags, carriage returns and newlines before I put it in a CSV file. Only thing is, I can't find a way to remove the excess white space from between the strings.
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How to subtract X day from a Date object in Java?
...ateTime.ofInstant(in.toInstant(), ZoneId.systemDefault());
Date out = Date.from(ldt.atZone(ZoneId.systemDefault()).toInstant());
Java 7 and earlier
Use Calendar's add() method
Calendar cal = Calendar.getInstance();
cal.setTime(dateInstance);
cal.add(Calendar.DATE, -30);
Date dateBefore30Days = c...
static function in C
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Making a function static hides it from other translation units, which helps provide encapsulation.
helper_file.c
int f1(int); /* prototype */
static int f2(int); /* prototype */
int f1(int foo) {
return f2(foo); /* ok, f2 is in the same translat...
How can you hide database output in Rails console?
In newer version of Rails, I'm guessing from 3 up, database queries are output to the console. This is useful most of the time, but how can you hide it when you do not want to see it?
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Is int[] a reference type or a value type?
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arrays (arrays of arrays). All array
types are implicitly derived from
System.Array, which itself is derived
from System.Object. This means that
all arrays are always reference types
which are allocated on the managed
heap, and your app's variable contains
a reference to the arr...
Devise - How do I forbid certain users from signing in?
...og in."
end
I think that is quite important because the standard message from Devise says:
"Your account is not activated yet."
That is confusing for users and the real reason is that you have "banned" them from logging in.
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