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Uses for Optional
...aving been using Java 8 now for 6+ months or so, I'm pretty happy with the new API changes. One area I'm still not confident in is when to use Optional . I seem to swing between wanting to use it everywhere something may be null , and nowhere at all.
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REST, HTTP DELETE and parameters
...unction () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f2539394%2frest-http-delete-and-parameters%23new-answer', 'question_page');
}
);
...
Row Offset in SQL Server
...
I would avoid using SELECT *. Specify columns you actually want even though it may be all of them.
SQL Server 2005+
SELECT col1, col2
FROM (
SELECT col1, col2, ROW_NUMBER() OVER (ORDER BY ID) AS RowNum
FROM MyTable
) AS MyDer...
Running a cron job at 2:30 AM everyday
...ely to get a message prompt on the form:
$ crontab -e
crontab: installing new crontab
"/tmp/crontab.tNt1NL/crontab":7: bad minute
errors in crontab file, can't install.
Do you want to retry the same edit? (y/n)
If you have further problems with crontab not running you can check Debugging crontab...
Literal notation for Dictionary in C#?
...
You use the collection initializer syntax, but you still need to make a new Dictionary<string, string> object first as the shortcut syntax is translated to a bunch of Add() calls (like your code):
var data = new Dictionary<string, string>
{
{ "test", "val" },
{ "test2", "val...
Why can I type alias functions and use them without casting?
In Go, if you define a new type e.g.:
2 Answers
2
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XPath: select text node
...unction () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f5033955%2fxpath-select-text-node%23new-answer', 'question_page');
}
);
...
Javascript replace with reference to matched group?
...unction () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fstackoverflow.com%2fquestions%2f1234712%2fjavascript-replace-with-reference-to-matched-group%23new-answer', 'question_page');
}
);
...
External resource not being loaded by AngularJs
...
Whitelist the resource with $sceDelegateProvider
This is caused by a new security policy put in place in Angular 1.2. It makes XSS harder by preventing a hacker from dialling out (i.e. making a request to a foreign URL, potentially containing a payload).
To get around it properly you need to ...
Set “this” variable easily?
...e++; // |this| properly refers to the person object
}, 1000);
}
var p = new Person();
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