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坐等升级！Win10终极正式版迎里程碑 - 资讯 - 清泛网 - 专注IT技能提升
坐等升级！Win10终极正式版迎里程碑Windows 10今年会有两次大的更新，五月更新已经推送，而接下来更新的版本为20H2。据外媒最新消息称，Windows 10 20H2已经达到了宣布普遍
Windows 10今年会有两次大的更新，五月更新已经推送，...
How to produce a range with step n in bash? (generate a sequence of numbers with increments)
...
I'd do
for i in `seq 0 2 10`; do echo $i; done
(though of course seq 0 2 10 will produce the same output on its own).
Note that seq allows floating-point numbers (e.g., seq .5 .25 3.5) but bash's brace expansion only allows integers.
...
Javascript parseInt() with leading zeros
...n force the base by passing the base as the 2nd parameter.
parseInt("09", 10) // 9
According to the docs, the 2nd parameter is optional, but it's not always assumed to be 10, as you can see from your example.
share
...
Pass a data.frame column name to a function
...
109
You can just use the column name directly:
df <- data.frame(A=1:10, B=2:11, C=3:12)
fun1 &...
Increasing the timeout value in a WCF service
...gt;
<binding name="longTimeoutBinding"
receiveTimeout="00:10:00" sendTimeout="00:10:00">
<security mode="None"/>
</binding>
</netTcpBinding>
</bindings>
<services>
<service name="longTimeoutService"
behaviorConfigu...
Best way to store date/time in mongodb
...)
> db.test.find()
{ "_id" : ObjectId("..."), "date" : ISODate("2014-02-10T10:50:42.389Z") }
{ "_id" : ObjectId("..."), "date" : ISODate("2014-02-10T10:50:57.240Z") }
The native type supports a whole range of useful methods out of the box, which you can use in your map-reduce jobs, for example....
Is it possible to set transparency in CSS3 box-shadow?
...ow and rgba() is roughly the same.
/* 50% black box shadow */
box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.5);
div {
width: 200px;
height: 50px;
line-height: 50px;
text-align: center;
color: white;
background-color: red;
margin: 10px;
}
div.a {
box-shad...
Remove new lines from string and replace with one empty space
...
answered Sep 21 '10 at 13:36
jwuellerjwueller
27.9k44 gold badges5959 silver badges6868 bronze badges
...
How to install therubyracer gem on 10.10 Yosemite?
I don't manage to install therubyracer gem on Yosemite 10.10.
18 Answers
18
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What does a double * (splat) operator do
...this code:
def foo(a, *b, **c)
[a, b, c]
end
Here's a demo:
> foo 10
=> [10, [], {}]
> foo 10, 20, 30
=> [10, [20, 30], {}]
> foo 10, 20, 30, d: 40, e: 50
=> [10, [20, 30], {:d=>40, :e=>50}]
> foo 10, d: 40, e: 50
=> [10, [], {:d=>40, :e=>50}]
...