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How to pass a user defined argument in scrapy spider
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The above code is only partially working for me. For eg. If I define domain using self.domain, I'm still not able to access it outside the __init__ method. Python throws a not defined error. BTW, why have you omitted the super call? PS. I'm working wit...
How to use ScrollView in Android?
...on one of the views in the LinearLayout makes that view expand to fill any extra space.
Here is the XML
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match...
How to use Swift @autoclosure
...his is Swift 3):
func print(_ item: @autoclosure () -> Any, separator: String = " ", terminator: String = "\n") {
#if DEBUG
Swift.print(item(), separator:separator, terminator: terminator)
#endif
}
When you say print(myExpensiveFunction()), my print override overshadows Swift's pri...
Passing a std::array of unknown size to a function
...way to make this work, as one would with plain C-style arrays?
No. You really cannot do that unless you make your function a function template (or use another sort of container, like an std::vector, as suggested in the comments to the question):
template<std::size_t SIZE>
void mulArray(std:...
Change SVN repository URL
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Didn't know about the switch command all the documentation I found online is for newer versions.
– Dustin Cook
Feb 10 '16 at 9:54
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解决WaitForSingleObject阻塞UI线程的问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ile (TRUE)
{
//wait for m_hThread to be over，and wait for
//QS_ALLINPUT（Any message is in the queue）
dwRet = MsgWaitForMultipleObjects(1, &hThread, FALSE, INFINITE, QS_ALLINPUT);
switch(dwRet)
{
case WAIT_OBJECT_0:
break; //break the loop
case WAIT_OBJECT_0 + 1:
...
What algorithm does Readability use for extracting text from URLs?
... the "relevant" text from a URL by eliminating the text related to ads and all the other clutter.After several months of researching, I gave it up as a problem that cannot be accurately determined. (I've tried different ways but none were reliable)
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Why is it important to override GetHashCode when Equals method is overridden?
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How about:
public override int GetHashCode()
{
return string.Format("{0}_{1}_{2}", prop1, prop2, prop3).GetHashCode();
}
Assuming performance is not an issue :)
share
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im...
Rails: FATAL - Peer authentication failed for user (PG::Error)
...seeing if postgres works, create a scaffold:
$ rails g scaffold cats name:string age:integer colour:string
3) As of rails 4.0.1 the -d postgresql option generates a YAML that doesn't include a host parameter. I found I needed this. Edit the development section and create the following parameters:...
cannot convert data (type interface {}) to type string: need type assertion
... example, you were asserting data (type interface{}) has the concrete type string. If you are wrong, the program will panic at runtime. You do not need to worry about efficiency, checking just requires comparing two pointer values.
If you were unsure if it was a string or not, you could test using ...