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How can I echo a newline in a batch file?
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the example doesn't need a period, but you do need one to echo a blank empty line: echo. && echo hello && echo. && echo world
– matt wilkie
Jun 16 '11 at 22:37
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Real World Example of the Strategy Pattern
...e", but it's not yet clear what that rule will be, and we may think of new ones.
Games: We want player to either walk or run when he moves, but maybe in the future, he should also be able to swim, fly, teleport, burrow underground, etc.
Storing information: We want the application to store informati...
RegEx to parse or validate Base64 data
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^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=)?$
This one is good, but will match an empty String
This one does not match empty string :
^(?:[A-Za-z0-9+/]{4})*(?:[A-Za-z0-9+/]{2}==|[A-Za-z0-9+/]{3}=|[A-Za-z0-9+/]{4})$
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Cannot make a static reference to the non-static method
...n the type directly, say like this:
The previous statement is not correct. One can also refer to static fields with an object reference like myObject.staticMethod() but this is discouraged because it does not make it clear that they are class variables.
... = SomeClass.final
And the two cannot w...
Add … if string is too long PHP [duplicate]
...ld in my MySQL database, and I access the database on two different pages, one page I display the whole field, but on the other, I just want to display the first 50 characters. If the string in the description field is less than 50 characters, then it won't show ... , but if it isn't, I will show ....
Why should Java ThreadLocal variables be static
...t, etc. You don't want them also sub-scoped to the instance of the class.
One web request => one Persistence session.
Not one web request => one persistence session per object.
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What part of Hindley-Milner do you not understand?
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: and ∈ are very similar, in that they mean that one thing is contained in another thing – a set contains elements, and a type contains values, in a sense. The crucial difference is that x ∈ S means that a set S literally contains an element x, whereas Γ ⊢ x : T mean...
Are querystring parameters secure in HTTPS (HTTP + SSL)? [duplicate]
...n, Google or others ask you to put your API key in the query parameter, anyone who can have a read-only access to the logs can forge your ID? Say if anyone at Loggly leaks any info, lots of services would be compromised?
– Adrien
Jan 26 '14 at 15:53
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Why is creating a Thread said to be expensive?
...e possibly cheaper to create, but you pay for it in other areas.)
I've done a bit of digging to see how a Java thread's stack really gets allocated. In the case of OpenJDK 6 on Linux, the thread stack is allocated by the call to pthread_create that creates the native thread. (The JVM does not p...
Set up git to pull and push all branches
... to push and pull all the branches by default, including the newly created ones.
8 Answers
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