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Nodejs - Redirect url
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The logic of determining a "wrong" url is specific to your application. It could be a simple file not found error or something else if you are doing a RESTful app. Once you've figured that out, sending a redirect is as simple as:
response.writeHead(302, {
'Location': ...
SQL Server, convert a named instance to default instance?
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Actually this is the response to this question but if you need change your instance name, please see Zasz answer. Please do not downvote because is not what you are looking for, check the question first.
– Leandro
Apr 4 '15 at 21:31
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How to randomize (or permute) a dataframe rowwise and columnwise?
... Well, this is changing order of rows and columns, but what OP wanted is different: shuffle each column/row independently
– JelenaČuklina
Feb 2 '16 at 10:51
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When annotating a class with @Component, does this mean it is a Spring Bean and Singleton?
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Yes, that is correct, @Component is a Spring bean and a Singleton.
If the class belongs to the service layer you may want to annotate it with @Service instead
But have in mind that in order for these annotations to be detected, you need to place this line in applicationContext.xml:
<con...
How to calculate percentage with a SQL statement
... the table will be scanned twice. Also the query will not look that simple if there is more than one table referenced.
– Alex Aza
May 19 '11 at 21:15
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What does -D_XOPEN_SOURCE do/mean?
...le without this arg. I checked the gcc man page, but did not find this specific option. I did find XOPEN_SOURCE , but there was little explanation of what it does.
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Saving images in Python at a very high quality
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If you are using matplotlib and trying to get good figures in a latex document, save as an eps. Specifically, try something like this after running the commands to plot the image:
plt.savefig('destination_path.eps', format='...
jQuery - prevent default, then continue default
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It's not a good example becayse it's synchronyous. What if the stuff I need to do is async call? So the case is "click submit -> do async stuff and dont' submit the form -> in async callback fill some fields in the form -> submit the form from the callback"
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Fully backup a git repo?
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@Daniel: If you clone a repository, you fetch every branch, but only the default one is checkouted. Try git branch -a. Maybe its more obvious this way: After cloning a repository you dont fetch every branch, you fetch every commit. Br...
Difference between object and class in Scala
...t O an instance of trait T; you can then pass O anywhere, a T is expected.
if there is a class C, then object C is the companion object of class C; note that the companion object is not automatically an instance of C.
Also see Scala documentation for object and class.
object as host of static mem...