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Reset auto increment counter in postgres
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Converted from comment for the sake of visitor's convenience
It's not clear from this message what the correct syntax is. It is:
ALTER SEQUENCE product_id_seq RESTART WITH 1453;
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How to escape the % (percent) sign in C's printf?
...rsion specification) causes a '%' character to be written with no argument converted.
The string really has 2 '%' characters inside (as opposed to escaping characters: "a\bc" is a string with 3 non null characters; "a%%b" is a string with 4 non null characters).
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Is cout synchronized/thread-safe?
...afety of something, you should treat it as not thread-safe.
Of particular interest here is the fact that cout is buffered. Even if the calls to write (or whatever it is that accomplishes that effect in that particular implementation) are guaranteed to be mutually exclusive, the buffer might be shar...
Determine if a sequence contains all elements of another sequence using Linq [duplicate]
... superset is HUGE. It avoids repeatedly enumerating superset.
HashSet<int> hashSet = new HashSet<int>(superset);
bool contained = subset.All(i => hashSet.Contains(i));
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How to deal with SQL column names that look like SQL keywords?
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select "from" from "table";
Note: Internally PostgreSQL automatically converts all unquoted commands and parameters to lower case. That have the effect that commands and identifiers aren't case sensitive. sEleCt * from tAblE; is interpreted as select * from table;. However, parameters inside do...
How to pass parameters in GET requests with jQuery
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you need to convert the object into GET parameters with jQuery.param() function, so using jQuery you should use data:$.param({ajaxid: 4, UserID: UserID, EmailAddress: EmailAddress}), instead of data: { ajaxid: 4, UserID: UserID...
Is there a way to iterate over a dictionary?
...supports fast enumeration. With Objective-C 2.0, you can do this:
// To print out all key-value pairs in the NSDictionary myDict
for(id key in myDict)
NSLog(@"key=%@ value=%@", key, [myDict objectForKey:key]);
The alternate method (which you have to use if you're targeting Mac OS X pre-10.5, ...
How to add calendar events in Android?
...ws calendar apps. There are some common data formats (e.g., iCalendar) and Internet protocols (e.g., CalDAV), but no common API. Some calendar apps don't even offer an API.
If there are specific calendar applications you wish to integrate with, contact their developers and determine if they offer a...
How to read lines of a file in Ruby
...rns about handling any type of line endings since both "\r\n" and "\r" are converted to Linux standard "\n" before parsing the lines.
To support the "\r" EOL character along with the regular "\n", and "\r\n" from Windows, here's what I would do:
line_num=0
text=File.open('xxx.txt').read
text.gsub!...
@UniqueConstraint annotation in Java
...e you can write
@Column(unique=true)
String username;
The @UniqueConstraint annotation is for annotating multiple unique keys at the table level, which is why you get an error when applying it to a field.
References (JPA TopLink):
@UniqueConstraint
@Column
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