大约有 45,000 项符合查询结果（耗时：0.0476秒） [XML]
Is it possible to run selenium (Firefox) web driver without a GUI?
...
This works and supports screenshots. I use this. It also works with google chrome.
– Isaac
May 2 '12 at 14:30
...
Function to clear the console in R and RStudio
I am wondering if there is a function to clear the console in R and, in particular, RStudio I am looking for a function that I can type into the console, and not a keyboard shortcut.
...
X-Frame-Options Allow-From multiple domains
... is deprecated. From MDN:
This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. Do not use it in old or new projects. Pages or Web apps using it may break at any time.
The modern alternative is the Content-Securi...
matplotlib does not show my drawings although I call pyplot.show()
...xa64932c>]
In [3]: p.show()
If you edit ~/.matplotlib/matplotlibrc and change the backend to something like GtkAgg, you should see a plot. You can list all the backends available on your machine with
import matplotlib.rcsetup as rcsetup
print(rcsetup.all_backends)
It should return a list ...
Is it possible to specify condition in Count()?
...
what if my field is integer and I want to match null. it doesn't work this way select count(case IntegerField when 'NULL' then 1 else null end) from
– Faizan
Aug 31 '16 at 10:16
...
ArithmeticException: “Non-terminating decimal expansion; no exact representable decimal result”
... setting of a MathContext object with a precision setting of 0 is not used and thus irrelevant. In the case of divide, the exact quotient could have an infinitely long decimal expansion; for example, 1 divided by 3.
If the quotient has a nonterminating decimal expansion and the operation is specifie...
How do I get the dialer to open with phone number displayed?
...t.ACTION_CALL. In this case, you must add the following permission in your AndroidManifest.xml:
<uses-permission android:name="android.permission.CALL_PHONE" />
2) Need user to click on Phone_Number string and start the call.
android:autoLink="phone"
You need to use TextView with below prop...
Difference between method and function in Scala
...cification tell us. Chapter 3 (types) tell us about Function Types (3.2.9) and Method Types (3.3.1). Chapter 4 (basic declarations) speaks of Value Declaration and Definitions (4.1), Variable Declaration and Definitions (4.2) and Functions Declarations and Definitions (4.6). Chapter 6 (expressions) ...
A beginner's guide to SQL database design [closed]
...fmann Series in Data Management Systems) (Paperback) by Jan L. Harrington and found it very clear and helpful
and as you get up to speed this one was good too Database Systems: A Practical Approach to Design, Implementation and Management (International Computer Science Series) (Paperback)
I thin...
Shading a kernel density plot between two points.
...ently use kernel density plots to illustrate distributions. These are easy and fast to create in R like so:
5 Answers
...