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postgres: upgrade a user to be a superuser?
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and how can i detect if myuser is currently superuser?
– masterweily
May 10 '13 at 8:18
20
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Forward an invocation of a variadic function in C
...iable number of arguments, you can't do it. See http://c-faq.com/varargs/handoff.html.
Example:
void myfun(const char *fmt, va_list argp) {
vfprintf(stderr, fmt, argp);
}
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JavaScript blob filename without link
...'s part of HTML5.
Some file formats are considered insecure by the browser and the download fails. Saving JSON files with txt extension works for me.
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Ruby on Rails: How do I add placeholder text to a f.text_field?
...to my f.text_field fields so that the text comes pre-written by default, and when a user click inside the fields, the text goes away - allowing the user to type in the new text?
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How can I get current location from user in iOS
...app's Info.plist. Otherwise calls to startUpdatingLocation will be ignored and your delegate will not receive any callback.
And at the end when you are done reading location call stopUpdating location at suitable place.
[locationManager stopUpdatingLocation];
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How can I send an email by Java application using GMail, Yahoo, or Hotmail?
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First download the JavaMail API and make sure the relevant jar files are in your classpath.
Here's a full working example using GMail.
import java.util.*;
import javax.mail.*;
import javax.mail.internet.*;
public class Main {
private static String U...
json_encode/json_decode - returns stdClass instead of Array in PHP
...round, IMO. What if you want json-encoded objects to be decoded as objects and json-decoded associative arrays to be decoded as associative arrays, automatically? Using the second parameter to json_decode() implies some sort of human intervention. Frankly, this is sucky (of PHP, not of this answer)
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How to set the part of the text view is clickable
I have the text " Android is a Software stack ". In this text i want to set the " stack " text is clickable. in the sense if you click on that it will redirected to a new activity(not in the browser).
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What are valid values for the id attribute in HTML?
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For HTML 4, the answer is technically:
ID and NAME tokens must begin with a letter ([A-Za-z]) and may be followed by any number of letters, digits ([0-9]), hyphens ("-"), underscores ("_"), colons (":"), and periods (".").
HTML 5 is even more permissive, saying onl...
Change name of folder when cloning from GitHub?
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I tried the RTFM approach and failed (hence why I'm here), but if you run git clone --help it will give you something like this: git clone [--very-many-options...] <repository> [<directory>], so we see that git clone repo_url my_directory...