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Grouped LIMIT in PostgreSQL: show the first N rows for each group?
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How can we select all columns of t_top. The t table contains a json column and I get "could not identify equality operator for type json postgres" error when I select distinct t_outer.section_id, t_top.*
– suat
May 10 at 11:35
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Why is there a difference in checking null against a value in VB.NET and C#?
...nt that supports null, it is incumbent on the programmer to know the truth tables and null-propagation used by that language.
Update
Eric Lippert's blog articles (mentioned in his comments below) on semantics are now at:
Sep. 30, 2003 - A Whole Lot of Nothing
Oct. 1, 2003 - A Little More on Noth...
Understand the “Decorator Pattern” with a real world example
...ant to have to recompile and reship every time. I'd want to add a row in a table in the backend or something that would easily take care of their requirement. Well said, @Stelios Adamantidis. I guess the patterns biggest strength though would be modifying 3rd-party classes then.
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techniques for obscuring sensitive strings in C++
...inary, you could for instance make sure that the key is not within the printable range.
Obscuring key with XOR
For instance, you could use XOR to split the key into two byte arrays:
key = key1 XOR key2
If you create key1 with the same byte-length as key you can use (completely) random byte valu...
clang: how to list supported target architectures?
...collection of features.
But now for the bad news. There is no convenient table of triples in Clang or LLVM that can be dumped, because the architecture-specific backends have the option of parsing the triple string into an llvm::Triple object (defined in include/llvm/ADT/Triple.h). In other words,...
Is it possible to use raw SQL within a Spring Repository
...rt javax.persistence.*;
import java.math.BigDecimal;
@Entity
@Table(name = "USER_INFO_TEST")
public class UserInfoTest {
private int id;
private String name;
private String rollNo;
public UserInfoTest() {
}
public UserInfoTest(int id...
How to compute the similarity between two text documents?
...ion:
session.run(tf.global_variables_initializer())
session.run(tf.tables_initializer())
message_embeddings_ = session.run(similarity_message_encodings, feed_dict={similarity_input_placeholder: messages})
corr = np.inner(message_embeddings_, message_embeddings_)
print(corr)
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Log4Net, how to add a custom field to my logging
I use the log4net.Appender.AdoNetAppender appender.
My log4net table are the following fields [Date],[Thread],[Level],[Logger],[Message],[Exception]
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Is it expensive to use try-catch blocks even if an exception is never thrown?
...tln:(Ljava/lang/String;)V
17: aload_1
18: athrow
Exception table:
from to target type
0 9 8 any
}
No "GOTO".
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When to wrap quotes around a shell variable?
...ull
file:I can't get this @&$*!! quoting right.
Double quotes are suitable when variable interpolation is required. With suitable adaptations, it is also a good workaround when you need single quotes in the string. (There is no straightforward way to escape a single quote between single quot...