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Python subprocess/Popen with a modified environment
I believe that running an external command with a slightly modified environment is a very common case. That's how I tend to do it:
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How can I define a composite primary key in SQL?
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Just for clarification: a table can have at most one primary key. A primary key consists of one or more columns (from that table). If a primary key consists of two or more columns it is called a composite primary key. It is defined as fol...
Why use a prime number in hashCode?
...hogonal prime factorizations.
Suppose there are 8 buckets to insert into. If the number you are using to multiply by is some multiple of 8, then the bucket inserted into will only be determined by the least significant entry (the one not multiplied at all). Similar entries will collide. Not good fo...
Creating threads - Task.Factory.StartNew vs new Thread()
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There is a big difference. Tasks are scheduled on the ThreadPool and could even be executed synchronous if appropiate.
If you have a long running background work you should specify this by using the correct Task Option.
You should prefer T...
How to send a stacktrace to log4j?
...tion and get the following on the standard output (like, say, the console) if you do a e.printStackTrace() :
11 Answers
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How do I combine a background-image and CSS3 gradient on the same element?
...properties that would apply to a single image may also be comma separated. If only 1 value is supplied, that will be applied to all stacked images including the gradient. background-size: 40px; will constrain both the image and the gradient to 40px height and width. However using background-size: 40...
How To Remove Outline Border From Input Button
...portant? I've heard from a lot of sources that you should only use it only if absolutely necessary.
– Jay
Jun 24 '15 at 17:04
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How do HttpOnly cookies work with AJAX requests?
JavaScript needs access to cookies if AJAX is used on a site with access restrictions based on cookies. Will HttpOnly cookies work on an AJAX site?
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Invoking a static method using reflection
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Fromthe Javadoc of Method.invoke():
If the underlying method is static, then the specified obj argument is ignored. It may be null.
What happens when you
Class klass = ...;
Method m = klass.getDeclaredMethod(methodName, paramtypes);
m.invoke(null, args)
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A Windows equivalent of the Unix tail command [closed]
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If you use PowerShell then this works:
Get-Content filenamehere -Wait -Tail 30
Posting Stefan's comment from below, so people don't miss it
PowerShell 3 introduces a -Tail parameter to include only the last x lines
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