大约有 9,600 项符合查询结果（耗时：0.0153秒） [XML]
Is a LINQ statement faster than a 'foreach' loop?
...memory collections - e.g. List<Foo>; instead, I should use a foreach block on these collections. The recommendation to use foreach in these contexts does make sense. My concern: should I only replace LINQ queries with foreach if I detect a performance issue? Going forward, I will consider the ...
Convert from enum ordinal to enum type
...n e) {
// Careful, if any exception is thrown out of a static block, the class
// won't be initialized
log.error("Unexpected exception initializing " + ReportTypeEnum.class, e);
}
}
public static ReportTypeEnum fromDbValue(Integer dbValue) {
...
C# “internal” access modifier when doing unit testing
...
Wrapping in and #if DEBUG, #endif block will enable this option only in debug builds.
– The Real Edward Cullen
Feb 4 '14 at 16:33
20
...
Returning binary file from controller in ASP.NET Web API
... data back to the client. Therefore, do not use a using (var stream = …) block. Web API will dispose the stream for you.
Make sure that the stream has its current position set to 0 (i.e. the beginning of the stream's data). In the above example, this is a given since you've only just opened the fi...
server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
...
This was my problem. My university was blocking ntp packets, which was preventing my system from updating time. Once I configured the university ntp servers things were working again. Thanks for this tip!
– Kyle
Mar 9 '15 at...
C# naming convention for constants?
...bably came from preprocessor macros rather than constants (I've never used block caps for true constants). In that context, it makes sense to distinguish the macros from the actual code because a macro may well actually be an expression and not a constant value, its expansion may cause side effects ...
How to get last inserted id?
...olIndexException) // this is executed only if there were errors in the try block
{
Console.WriteLine("Error: {0}", retrieveSymbolIndexException.ToString()); // user is informed about the error
}
CreateSymbolTable(LastInsertedId); //(3) // Create new table based o...
Bootstrap 3 Slide in Menu / Navbar on Mobile [closed]
.../
#slide-nav .navbar-toggle > .icon-bar {
width: 100%;
display: block;
height: 3px;
margin: 5px 0 0 0;
}
#slide-nav .navbar-toggle.slide-active .icon-bar {
background: orange
}
.navbar-header {
position: relative
}
/* un fix the navbar when active so that all the menu item...
Specifying an Index (Non-Unique Key) Using JPA
... support is not required by the JPA specification, which is a kind of road block for such a feature).
So you'll have to rely on a provider specific extension for that. Hibernate, OpenJPA and EclipseLink clearly do offer such an extension. I can't confirm for DataNucleus but since indexes definiti...
Comment out text in R Markdown (Rmd file)
...
Extra yaml blocks can be used anywhere inside the document, and commented out with #
---
title: "Untitled"
output: html_document
---
No comment.
---
# here's a comment
# ```{r}
# x = pi
# ```
---
Note however that this does not pr...