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psql: FATAL: role “postgres” does not exist
...ep is to check the missing role: What is the output within psql of the command \du ? On my Ubuntu system the relevant line looks like this:
List of roles
Role name | Attributes | Member of
-----------+-----------------------------------+-------...
Does a finally block always get executed in Java?
...
Example code:
public static void main(String[] args) {
System.out.println(Test.test());
}
public static int test() {
try {
return 0;
}
finally {
System.out.println("finally trumps return.");
}
}
Output:
finally trumps retur...
How to replace an entire line in a text file by line number
... are words from the line).
So, if the current line number is 4, print the string "different" but otherwise print the line unchanged.
In AWK, program code enclosed in { } runs once on each input record.
You need to quote the AWK program in single-quotes to keep the shell from trying to interpret t...
How to use ELMAH to manually log errors
...mah
/// </summary>
public static void LogError(Exception ex, string contextualMessage=null)
{
try
{
// log error to Elmah
if (contextualMessage != null)
{
// log exception with contextual information that's visibl...
Join an Array in Objective-C
I'm looking for a method of turning a NSMutableArray into a string. Is there anything on a par with this Ruby array method?
...
Convert array to JSON
...ub.com/douglascrockford/JSON-js/blob/master/json2.js
And call:
var myJsonString = JSON.stringify(yourArray);
Note: The JSON object is now part of most modern web browsers (IE 8 & above). See caniuse for full listing. Credit goes to: @Spudley for his comment below
...
What is the correct value for the disabled attribute?
...lse value.
If the attribute is present, its value must either be the empty string or a value that is an ASCII case-insensitive match for the attribute's canonical name, with no leading or trailing whitespace.
Conclusion:
The following are valid, equivalent and true:
<input type="text" disabled /...
How can I select every other line with multiple cursors in Sublime Text?
... moment to comment on the answer above.
You can use the following search string with the regex turned on, and then press alt+enter. Followed by a left arrow. This would put a cursor each on alternate lines (same steps as explained by Joe Daley)
^.*\n.*$
...
How do I handle ImeOptions' done button click?
...content"
android:imeActionId="@integer/send"
android:imeActionLabel="@+string/send_label"
android:imeOptions="actionSend"
android:inputType="textEmailAddress"/>
And then, the sample code worked.
share
|...
Why shouldn't I use PyPy over CPython if PyPy is 6.3 times faster?
...e significantly slower. 3. PyPy used to be slower than CPython at handling strings - now it's often better and rarely worse. 4. Many "scripts" are just glue code - making the interpreter faster won't improve overall runtimes in that case. 5. PyPy's warmup times used to be larger - short running scri...