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Performance of Arrays vs. Lists
... if you are reading all of the data; a dictionary would be quicker for key-based lookups.
Here's my results using "int" (the second number is a checksum to verify they all did the same work):
(edited to fix bug)
List/for: 1971ms (589725196)
Array/for: 1864ms (589725196)
List/foreach: 3054ms (5897...
When to use a key/value store such as Redis instead/along side of a SQL database?
...od for frequently updated real-time data, such as session store, state database, statistics, caching and its advanced data structures offers versatility to many other scenarios.
Redis, however, isn't NoSQL replacement for classic relational databases since it doesn't support many standard features ...
How Pony (ORM) does its tricks?
...ntax tree)
Translation of Python AST into "abstract SQL" -- universal
list-based representation of a SQL query
Converting abstract SQL representation into specific
database-dependent SQL dialect
The most complex part is the second step, where Pony must
understand the "meaning" of Python expression...
Binding a WPF ComboBox to a custom list
...these problems.
Edit2 (.NET 4.5): The content of the DropDownList can be based on ToString() and not of DisplayMemberPath, while DisplayMemberPath specifies the member for the selected and displayed item only.
share
...
PreparedStatement IN clause alternatives?
...g any(String sql, final int params) {
// Create a comma-delimited list based on the number of parameters.
final StringBuilder sb = new StringBuilder(
new String(new char[params]).replace("\0", "?,")
);
// Remove trailing comma.
sb.setLength(Math.max(sb.length() - 1, ...
Is is possible to check if an object is already attached to a data context in Entity Framework?
...ties refer to the same entity. I haven't figure out how to only attach the base entity, so I had to redesign the project a bit, to use separate contexts for each "business transaction", like it was designed for. I'll note this for future projects.
– Aske B.
Jan...
How does the main() method work in C?
...ents.
The leftmost arguments are closer to the top of the stack, or to the base of the stack frame, so that spurious arguments do not invalidate the addressing.
One set of calling conventions which obeys these rules is stack-based parameter passing whereby the caller pops the arguments, and they a...
How to return an array from JNI to Java?
...
Based on the asked question, this is already explained in the first answer that how can we pass int[] via jobjectArray. But Here is an example how we can return a jobjectArray which contains lists of data. This can be helpful...
Bootstrap 3 offset on right not left
...
I modified Bootstrap SASS (v3.3.5) based on Rukshan's answer
Add this in the end of the calc-grid-column mixin in mixins/_grid-framework.scss, right below the $type == offset if condition.
@if ($type == offset-right) {
.col-#{$class}-offset-right-#{$in...
Difference between a theta join, equijoin and natural join
...ers to an arbitrary condition used as the criterion for the join. (see Database Systems: The Complete Book by Garcia-Molina, Ullman, Widom, chapter 2, Theta Join)
– Ram Rajamony
Feb 4 '17 at 21:14
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