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'printf' vs. 'cout' in C++
... clock_gettime(CLOCK_REALTIME, &end);
double duration = 1e3 * (end.tv_sec - d_start.tv_sec) +
1e-6 * (end.tv_nsec - d_start.tv_nsec);
std::cerr << d_name << '\t' << std::fixed << duration << " ms\n";
}...
Why does pthread_cond_wait have spurious wakeups?
...he mutex is unlocked by calling pthread_cond_wait.
– a3f
Dec 13 '16 at 19:51
1
This answer's exam...
Uber5岁了，一次性告诉你它的商业之道 - 资讯 - 清泛网 - 专注C/C++及内核技术
...愿透露姓名的专车司机向《中国新闻周刊》透露：以奥迪A6为例，在UberBlack的接单价格是每公里3.5元，而滴滴快的为4元。
对乘客低价又要吸引司机，Uber在中国采取了大规模补贴政策。
以Uber(中国)于2015年5月11日生效的奖励政策...
GridLayout and Row/Column Span Woe
...2"
android:layout_rowSpan="2"
android:background="#a30000"
android:gravity="center"
android:text="1"
android:textColor="@android:color/white"
android:textSize="20dip" />
<TextView
android:layout_width=...
Is “inline” without “static” or “extern” ever useful in C99?
...oy You need to use -std=c99 instead of -std=gnu89.
– a3f
Feb 17 '17 at 6:19
...
Multiple INSERT statements vs. single INSERT with multiple VALUES
...SERT INTO T_TESTS (TestId, FirstName, LastName, Age)
VALUES ('6f3f7257-a3d8-4a78-b2e1-c9b767cfe1c1', 'First 0', 'Last 0', 0);
INSERT INTO T_TESTS (TestId, FirstName, LastName, Age)
VALUES ('32023304-2e55-4768-8e52-1ba589b82c8b', 'First 1', 'Last 1', 1);
...
INSERT INTO T_TESTS (TestId, First...
Rails 3.1: Engine vs. Mountable App
...gin.03/lib/test-plugin/engine.rb test-plugin.04/lib/test-plugin/engine.rb
2a3
> isolate_namespace TestPlugin
of particular interest (to me) is the fact that there is no difference between
rails plugin new test-plugin -T --mountable
and
rails plugin new test-plugin -T --full --mountable
...
Ternary operator is twice as slow as an if-else block?
...le 000000AD
{
diff = 2;
000000a3 mov dword ptr [ebp-24h],2
000000aa nop
000000ab jmp 000000B4
}
else
{
diff = 3;
000000ad mov dword ptr [ebp-24h],3
...
Grouping functions (tapply, by, aggregate) and the *apply family
...ek"),
b = 3, c = "Yikes",
d = list(a2 = 1, b2 = list(a3 = "Hey", b3 = 5)))
# Result is named vector, coerced to character
rapply(l, myFun)
# Result is a nested list like l, with values altered
rapply(l, myFun, how="replace")
tapply - For when you want to apply a f...
Any reason why scala does not explicitly support dependent types?
... | }
sigma: java.lang.Object with Sigma{val bar: this.foo.Bar} = $anon$1@e3fabd8
and in fact, this is a crucial part of the encoding of dependent method types which is needed to escape from the 'Bakery of Doom' in Scala prior to 2.10 (or earlier via the experimental -Ydependent-method types Scal...