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How to write trycatch in R
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Given that the first string in your paste functions ends with a space, why not omit the space and the sep=""?
– seancarmody
Aug 30 '12 at 11:56
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Change type of varchar field to integer: “cannot be cast automatically to type integer”
...y this, it will work for sure.
When writing Rails migrations to convert a string column to an integer you'd usually say:
change_column :table_name, :column_name, :integer
However, PostgreSQL will complain:
PG::DatatypeMismatch: ERROR: column "column_name" cannot be cast automatically to type i...
How to convert from System.Enum to base integer?
...responding integer value, without casting and preferably without parsing a string.
8 Answers
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Dual emission of constructor symbols
...? This class has no base. Why does it have a "complete object constructor" and a "base object constructor" for each?
This Q&A implies to me that this is simply a by-product of polymorphism support, even though it's not actually required in this case.
Note that c++filt used to include this info...
Convert string in base64 to image and save on filesystem in Python
I have a string in base64 format, which represents PNG image. Is there a way to save this image to the filesystem, as a PNG file?
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Serialize Class containing Dictionary member
... This implementation will work if the dictionary is storing, say, string values, but will throw an InvalidOperationException on deserialization mentioning an unexpected wrapper element if you try storing custom objects or string arrays in it. (See my question for an example of the issues I ...
Simplest way to read json from a URL in java
...;
import org.json.JSONObject;
public class JsonReader {
private static String readAll(Reader rd) throws IOException {
StringBuilder sb = new StringBuilder();
int cp;
while ((cp = rd.read()) != -1) {
sb.append((char) cp);
}
return sb.toString();
}
public static JSON...
jQuery - Add ID instead of Class
...));
});
});
So you are changing/overwriting the id of three elements and adding an id to one element.
You can modify as per you needs...
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f...
What does an underscore in front of an import statement mean?
...river{})
Once it's registered in this way, sqlite3 can be used with the standard library's sql interface in your code like in the example:
db, err := sql.Open("sqlite3", "./foo.db")
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improv...
What's the hardest or most misunderstood aspect of LINQ? [closed]
...cal grasp of it:
static void Linq_Deferred_Execution_Demo()
{
List<String> items = new List<string> { "Bob", "Alice", "Trent" };
var results = from s in items select s;
Console.WriteLine("Before add:");
foreach (var result in results)
{
Console.WriteLine(re...