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How do I concatenate strings in Swift?
... do:
var c = "Hello"
c += ", World"
I'm sure there are more ways too.
Bit of description
let creates a constant. (sort of like an NSString). You can't change its value once you have set it. You can still add it to other things and create new variables though.
var creates a variable. (sort of l...
How do I convert a String to an int in Java?
..., you can use an Ints method from the Guava library, which in combination with Java 8's Optional, makes for a powerful and concise way to convert a string into an int:
import com.google.common.primitives.Ints;
int foo = Optional.ofNullable(myString)
.map(Ints::tryParse)
.orElse(0)
...
Origin is not allowed by Access-Control-Allow-Origin
...trol-Allow-Origin * setting in the Apache configuration or htaccess file.
It should be noted that this effectively disables CORS protection, which very likely exposes your users to attack. If you don't know that you specifically need to use a wildcard, you should not use it, and instead you should ...
What does the plus sign do in '+new Date'
...
that's the + unary operator, it's equivalent to:
function(){ return Number(new Date); }
see:
http://xkr.us/articles/javascript/unary-add/
and in MDN: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/Arithmetic_Operators#Una...
How to search for a string in text files?
I want to check if a string is in a text file. If it is, do X. If it's not, do Y. However, this code always returns True for some reason. Can anyone see what is wrong?
...
Making a UITableView scroll when text field is selected
...d error, I'm giving up and asking the question. I've seen a lot of people with similar problems but can't get all the answers to work right.
...
How to get ID of the last updated row in MySQL?
...value', id = (SELECT @update_id := id)
WHERE some_other_column = 'blah' LIMIT 1;
SELECT @update_id;
EDIT by aefxx
This technique can be further expanded to retrieve the ID of every row affected by an update statement:
SET @uids := null;
UPDATE footable
SET foo = 'bar'
WHERE fooid > 5
...
How should I validate an e-mail address?
...e an e-mail to just send a confirmation e-mail to the address provided and it it bounces then it's not valid.
If you want to perform some basic checks you could just check that it's in the form *@*
If you have some business logic specific validation then you could perform that using a regex, e.g. ...
Pass array to ajax request in $.ajax() [duplicate]
... yes...that worked..thanks..one more thing can be done ...that is initialize info = {}; then data: info,
– Poonam Bhatt
Jan 18 '12 at 4:45
2
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What events does an fire when it's value is changed?
...ws what events an HTML5 <input type="number" /> element fires when its up / down arrows are clicked:
5 Answers
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