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Abort makefile if variable not set
...ning an auxiliary function for that:
# Check that given variables are set and all have non-empty values,
# die with an error otherwise.
#
# Params:
# 1. Variable name(s) to test.
# 2. (optional) Error message to print.
check_defined = \
$(strip $(foreach 1,$1, \
$(call __check_defin...
Are there disadvantages to using a generic varchar(255) for all text-based fields?
...se Ruby on Rails migrations map String fields to VARCHAR(255) by default and I never bothered to override it).
7 Answer...
CSS content property: is it possible to insert HTML instead of Text?
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got it thanks, so I think I will have to pass this idea and go straight to js, cheers
– zanona
Dec 22 '10 at 0:25
6
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How do Python functions handle the types of the parameters that you pass in?
...tely use an object of a type "as if" it was an object of a different type, and all elementary operations on the object are delegated to its type.
This has nothing to do with names. A name in Python doesn't "have a type": if and when a name's defined, the name refers to an object, and the object do...
How to create module-wide variables in Python? [duplicate]
... particular scope. (If you make a variable inside the Python interpreter, and then import other modules, your variable is in the outermost scope and thus global within your Python session.)
All you have to do to make a module-global variable is just assign to a name.
Imagine a file called foo.py,...
Why are preprocessor macros evil and what are the alternatives?
...d encountered a phrase like "macro should never be used", "macro are evil" and so on, my question is: why? With the new C++11 is there a real alternative after so many years?
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What is “the inverse side of the association” in a bidirectional JPA OneToMany/ManyToOne association
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To understand this, you must take a step back. In OO, the customer owns the orders (orders are a list in the customer object). There can't be an order without a customer. So the customer seems to be the owner of the orders.
But in the...
What is the difference between .text, .value, and .value2?
What is the difference between .text , .value , and .value2 ? Such as when should target.text, target.value, and target.value2 be used?
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Java EE web development, where do I start and what skills do I need? [closed]
... that you're already familiar with client side technologies like HTML, CSS and JS, so I won't go in detail with that. I also assume that you're already familiar with basic Java. Follow Oracle's The Java Tutorials and if possible, go get a OCP book or course as well.
Then you can start with JSP/Servl...
How can I discard remote changes and mark a file as “resolved”?
I have some local files, I pull from remote branch and there are conflicts. I know that I would like to keep my local changes and ignore the remote changes causing conflicts. Is there a command I can use to in effect say "mark all conflicts as resolved, use local"?
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