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Why do C and C++ compilers allow array lengths in function signatures when they're never enforced?
...he first dimension [10] is ignored; the compiler will not prevent you from indexing off the end (notice that the formal wants 10 elements, but the actual provides only 2). However, the size of the second dimension [20] is used to determine the stride of each row, and here, the formal must match the...
What is the difference between Set and List?
...ach element is inserted. The
user can access elements by their
integer index (position in the list),
and search for elements in the list.
Set<E>:
A collection that contains no
duplicate elements. More formally,
sets contain no pair of elements e1
and e2 such that e1.equals(e2...
MYSQL OR vs IN performance
...
What indexes were used in these tests?
– eggyal
Jan 1 '13 at 13:26
5
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CentOS 6.4下Squid代理服务器的安装与配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...开机启动
# /etc/init.d/httpd start
# chkconfig httpd on
C. 创建index.html
# echo "<h1>Squid-Web1/200.168.10.2" > /var/www/html/index.html
D. 修改Web服务器IP地址
将web服务器的IP地址修改为200.168.10.2
# ifconfig eth0 200.168.10.2
5.6 配置客户端IP地址
5.7 ...
NoSQL (MongoDB) vs Lucene (or Solr) as your database
...Roo: Would it be an option to use Lucene as a main DB and create aggregate indexes with MongoDB somehow? Or doesn't that make sense? And Mikos: great answer and +1 for the real-world experience mention.
– Grimace of Despair
Jul 16 '13 at 10:47
...
Select first 4 rows of a data.frame in R
...
You can use the "index" answer pointed out elsewhere. In this situation I normally use the slice function in dplyr. (Behavior depends on the grouping.)
– Eduardo Leoni
May 28 '18 at 21:16
...
Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue
...lancette
public class ColorFilterGenerator {
private static double DELTA_INDEX[] = {
0, 0.01, 0.02, 0.04, 0.05, 0.06, 0.07, 0.08, 0.1, 0.11,
0.12, 0.14, 0.15, 0.16, 0.17, 0.18, 0.20, 0.21, 0.22, 0.24,
0.25, 0.27, 0.28, 0.30, 0.32, 0.34, 0.36, 0.38, 0.40, 0.42,
0.44, 0.46, 0.48,...
size_t vs. uintptr_t
The C standard guarantees that size_t is a type that can hold any array index. This means that, logically, size_t should be able to hold any pointer type. I've read on some sites that I found on the Googles that this is legal and/or should always work:
...
Convert List to List
...tains((TFrom)(object)item); }
public void CopyTo(TTo[] array, int arrayIndex) { BaseList.CopyTo((TFrom[])(object)array, arrayIndex); }
public bool Remove(TTo item) { return BaseList.Remove((TFrom)(object)item); }
// IList
public TTo this[int index]
{
get { return (TTo)(o...
How can I search (case-insensitive) in a column using LIKE wildcard?
...HARACTER
SET UTF8 COLLATE UTF8_GENERAL_CI.
This will also rebuild any indexes on this column so that they could be used for the queries without leading '%'
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