Onformat String for Nspredicate

onFormat string For NSPredicate

Your predicte should be like this

let predicate = NSPredicate(format: "id IN %@", objectIDs)
let sortByUserId = NSSortDescriptor(key: "id", ascending: true)

Note : It is either self.id IN %@ or id IN %@.

C# convert int to string with padding zeros?

i.ToString().PadLeft(4, '0') - okay, but doesn't work for negative numbers

i.ToString("0000"); - explicit form

i.ToString("D4"); - short form format specifier

$"{i:0000}"; - string interpolation (C# 6.0+)

Android: Convert string to a time

Use SimpleDateFormat and it's parse() function to convert your timestamp from a string to a Date object. After that you can use Date.getTime() to get the long value of your timestamp in ms.

How can I display a negative symbol in .NET?

Use the Unicode character SUPERSCRIPT MINUS (U+207B) ⁻.

For example:

7-⁻5 = 13 

EDIT: Or, with a MINUS SIGN (U+2212) ⁻ for the minus:

7 − ⁻5 = 13 

Designing INSERT mapper for myBatis3 for given pojo type

In this case the simplest method would be to make DR abstract and add a method to it:

abstract class DR {
   public String getFilter();
}

class SQLDR {
   String sql;
   public String getFilter() {
       return sql;
   }
}

class PDR {
   Predicate predicate;
   public String getFilter() {
       return toString(predicate);
   }
}

And then use this new property in the mapper without any conditions:

<sql id="DOWNLOAD_FIELD_TYPES">
    #{key,jdbcType=VARCHAR},
    #{request.filter},
    #{status,jdbcType=OTHER},
    #{size,jdbcType=BIGINT},
    #{request.format,jdbcType=OTHER},
</sql>

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