大约有 3,623 项符合查询结果（耗时：0.0133秒） [XML]
Where do you store your salt strings?
...rks as long as it stays secret (opposite to the salt). A typical attack is SQL-injection, when someone gains access to the database but not to the code, a pepper stored in the database will be useless then. Most BCrypt implementations will add the salt automatically to the resulting hash-value, so t...
What are some (concrete) use-cases for metaclasses?
...with it.
For other real-world examples, take a look at various ORMs, like sqlalchemy's ORM or sqlobject. Again, the purpose is to interpret defintions (here SQL column definitions) with a particular meaning.
share
...
Difference between reduce and foldLeft/fold in functional programming (particularly Scala and Scala
... doesn't shuffle and doesn't use HashPartitioner.
import org.apache.spark.sql.SparkSession
/* Note: standalone (non-local) mode */
val master = "spark://...:7077"
val spark = SparkSession.builder.master(master).getOrCreate()
/* Note: deterministic order */
val rdd = sc.parallelize(Seq("a", "b"...
PHP parse/syntax errors; and how to solve them
... statement and variable.
⇓
if ($var = pdo_query($sql) {
$result = …
The curly { brace does not open the code block, without closing the if expression with the ) closing parenthesis first.
Else does not expect conditions
⇓
else ($var >= 0)
Solution: Remo...
What is the best way to compute trending topics or tags?
...
For anyone who would like it, I now have SQL queries to do this.
– thouliha
Feb 8 '16 at 13:42
1
...
What does Expression.Quote() do that Expression.Constant() can’t already do?
... wants to process expression trees into some other query language (such as SQL) could look out for a ConstantExpression with type Expression instead of a UnaryExpression with the special Quote node type, and everything else would be the same.
You are correct. We could encode semantic information t...
Comparison of full text search engine - Lucene, Sphinx, Postgresql, MySQL?
...use it talks directly to the database. Any slowness will come from complex SQL queries and un-indexed foreign keys and other such problems. I've never noticed any slowness in searching either.
I'm a Rails guy, so I've no idea how easy it is to implement with Django. There is a Python API that comes ...
How can you do anything useful without mutable state?
... ones in my new tree.
Using a more significant example, I also wrote this SQL parser which is totally stateless (or at least my code is stateless, I don't know whether the underlying lexing library is stateless).
Stateless programming is just as expressive and powerful as stateful programming, it ...
Is Unit Testing worth the effort? [closed]
... Testing is all about happiness. I've got a 3900-line package (PL/SQL) that handles automated postings to the general ledger system. Now, I personally hate dealing with accountants - they're so picky about little things like fractional pennies and stuff. Buncha anal-retentive arithmetic gee...
Bidirectional 1 to 1 Dictionary in C#
...er robustness you need to treat all the operations as the equivalent of an SQL transaction. For example, what happens to the overall dictionary state in Add(), if the firstToSecond.Add() throws an exception?
– Peter M
Nov 6 '08 at 13:16
...