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Why aren't variable-length arrays part of the C++ standard?
... And if you don't know the size beforehand, you will write unsafe code.
C99 VLAs could provide a small benefit of being able to create small arrays without wasting space or calling constructors for unused elements, but they will introduce rather large changes to the type system (you need to be abl...
What does the C++ standard state the size of int, long type to be?
...one of these de facto standards is legislated by the C standard (ISO/IEC 9899:1999), but all are permitted by it.
And, by definition, sizeof(char) is 1, notwithstanding the test in the Perl configure script.
Note that there were machines (Crays) where CHAR_BIT was much larger than 8. That meant, ...
pandas: filter rows of DataFrame with operator chaining
... A B C D
a 1 4 9 1
b 4 5 0 2
c 5 5 1 0
d 1 3 9 6
In [99]: df[(df.A == 1) & (df.D == 6)]
Out[99]:
A B C D
d 1 3 9 6
If you want to chain methods, you can add your own mask method and use that one.
In [90]: def mask(df, key, value):
....: return df[df[key]...
In Objective-C why should I check if self = [super init] is not nil?
... that if (self != nil) check is there, for proper operation of your class, 99.99% of the time you actually do need self to be non-nil.
Now, suppose, for whatever reason, [super init] did return nil, basically your check against nil is basically passing the buck up to the caller of your class, where...
CDN（内容分发网络）技术原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。DNS方式用户位置判断准确率大于85%，HTTP方式准确率为99%以上；一般情况下，各Cache服务器群的用户访问流入数据量与Cache服务器到原始网站取内容的数据量之比在2：1到3：1之间，即分担50%到70%的到原始网站重复访问数据量（主...
How do I associate file types with an iPhone application?
...
Ortwin Gentz
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answered May 6 '10 at 13:05
Brad Larson♦Brad Larson
...
Circle drawing with SVG's arc path
Short question: using SVG path, we can draw 99.99% of a circle and it shows up, but when it is 99.99999999% of a circle, then the circle won't show up. How can it be fixed?
...
App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
...
优化库导入导出方法
.aix 拓展下载：
cn.fun123.SQLite.aix - v1.2
中文网测试案例
.aia 测试源码下载：
TestSqlite.aia
打开数据库
一般可以在屏幕初始化时打开db。如果数据库已打开...
Is XSLT worth it? [closed]
...hing like:
<ReleaseNotes>
<FixedBugs>
<Bug id="123" component="Admin">Error when clicking the Foo button</Bug>
<Bug id="125" component="Core">Crash at startup when configuration is missing</Bug>
<Bug id="127" component="Admin">Er...