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Ruby optional parameters

...his method: e.g. If you're trying to make the default value for scope true and you pass in false, scope ||= true won't work. It evaluates the same as nil and will set it to true – Joshua Pinter Nov 10 '11 at 5:32 ...
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What are the most common naming conventions in C?

...e GTK+ coding convention, which can be summarized as follows: All macros and constants in caps: MAX_BUFFER_SIZE, TRACKING_ID_PREFIX. Struct names and typedef's in camelcase: GtkWidget, TrackingOrder. Functions that operate on structs: classic C style: gtk_widget_show(), tracking_order_process(). P...
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How to filter Pandas dataframe using 'in' and 'not in' like in SQL

How can I achieve the equivalents of SQL's IN and NOT IN ? 9 Answers 9 ...
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How do I set/unset a cookie with jQuery?

How do I set and unset a cookie using jQuery, for example create a cookie named test and set the value to 1 ? 14 Answers...
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Find nearest latitude/longitude with an SQL query

I have latitude and longitude and I want to pull the record from the database, which has nearest latitude and longitude by the distance, if that distance gets longer than specified one, then don't retrieve it. ...
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Quickly find whether a value is present in a C array?

...ate through an array of size 256 (preferably 1024, but 256 is the minimum) and check if a value matches the arrays contents. A bool will be set to true is this is the case. ...
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What's the purpose of the LEA instruction?

For me, it just seems like a funky MOV. What's its purpose and when should I use it? 16 Answers ...
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Volatile Vs Atomic [duplicate]

...rite -- such as i++, which is equivalent to i = i + 1, which does one read and one write -- is not atomic, since another thread may write to i between the read and the write. The Atomic classes, like AtomicInteger and AtomicReference, provide a wider variety of operations atomically, specifically i...
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Why do we need boxing and unboxing in C#?

Why do we need boxing and unboxing in C#? 11 Answers 11 ...
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The difference between the Runnable and Callable interfaces in Java

What is the difference between using the Runnable and Callable interfaces when designing a concurrent thread in Java, why would you choose one over the other? ...