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Ruby class instance variable vs. class variable
...n store something common to that class without having sub-classes automatically also get them (and vice-versa). With class variables, you have the convenience of not having to write self.class from an instance object, and (when desirable) you also get automatic sharing throughout the class hierarchy...
What is the Java equivalent for LINQ? [closed]
...cification, not an implementation... Lambda expressions is a part of LINQ. All projects trying to port LINQ to Java are implementations for a concrete scenario (SQL, Objects...) but does not covr the main goal of LINQ: Integrate the Language Query in the code. Due to this, there is no real alternati...
Is there a way to make text unselectable on an HTML page? [duplicate]
...e. Likewise, I believe, with the querySelector API which I'm guessing typically hooks into the CSS/xpath selector engines directly. This may change over time as browsers find perf tweaks but I would definitely keep this in mind when supporting IE<=8, maybe <=9.
– Erik Re...
Is it possible for a computer to “learn” a regular expression by user-provided examples?
...at most modern "regular expressions" used in programming languages are actually stronger than regular languages, and therefore sometimes harder to learn.
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How to resolve symbolic links in a shell script
...ircumstances, namely if the symlink of interest is to a directory that actually exists; plus, you must cd to it first, before calling pwd -P. In other words: it won't allow you to resolve (see the target of) symlinks to files or of broken symlinks, and for resolving existing-directory symlinks you h...
Static method behavior in multi-threaded environment in java
...that bother me and make several arguments in my mind.
I want to throw out all the doubts about below questions.
2 Answers
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Copy a stream to avoid “stream has already been operated upon or closed”
...ata, then by definition you either have to generate it twice (deterministically) or store it. If it already happens to be in a collection, great; then iterating it twice is cheap.
We did experiment in the design with "forked streams". What we found was that supporting this had real costs; it bu...
How can I use optional parameters in a T-SQL stored procedure?
...dure to do a search through a table. I have many different search fields, all of which are optional. Is there a way to create a stored procedure that will handle this? Let's say I have a table with four fields: ID, FirstName, LastName and Title. I could do something like this:
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How can I check if a single character appears in a string?
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But there's always a loop behind that call because you can't find a symbol otherwise.
– vava
Feb 3 '09 at 6:25
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What is the javascript filename naming convention? [closed]
...to use something similar to the naming scheme jQuery uses. It's not universally adopted but it is pretty common.
product-name.plugin-ver.sion.filetype.js
where the product-name + plugin pair can also represent a namespace and a module. The version and filetype are usually optional.
filetype can ...