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Is there YAML syntax for sharing part of a list or map?
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The merge key type is probably what you want. It uses a special << mapping key to indicate merges, allowing an alias to a mapping (or a sequence of such aliases) to be used as an initializer to merge into a single mapping. Additionally, you can still explicitly ove...
Return empty cell from formula in Excel
I need to return an empty cell from an Excel formula, but it appears that Excel treats an empty string or a reference to an empty cell differently than a true empty cell. So essentially I need something like
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What does Expression.Quote() do that Expression.Constant() can’t already do?
... LINQ's Expression.Quote method?” , but if you read on you will see that it doesn’t answer my question.
5 Answers
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Reading and writing binary file
I'm trying to write code to read a binary file into a buffer, then write the buffer to another file. I have the following code, but the buffer only stores a couple of ASCII characters from the first line in the file and nothing else.
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How to list the properties of a JavaScript object?
...eys.push(key);
}
return keys;
}
Alternatively replace var getKeys with Object.prototype.keys to allow you to call .keys() on any object. Extending the prototype has some side effects and I wouldn't recommend doing it.
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What happens if you call erase() on a map element while iterating from begin to end?
...g code I loop through a map and test if an element needs to be erased. Is it safe to erase the element and keep iterating or do I need to collect the keys in another container and do a second loop to call the erase()?
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How to add a delay for a 2 or 3 seconds [closed]
...follow
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edited Dec 18 '19 at 8:26
answered Mar 27 '11 at 14:46
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What is a Windows Handle?
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It's an abstract reference value to a resource, often memory or an open file, or a pipe.
Properly, in Windows, (and generally in computing) a handle is an abstraction which hides a real memory address from the API user, allo...
Use of alloc init instead of new
...a bunch of reasons here: http://macresearch.org/difference-between-alloc-init-and-new
Some selected ones are:
new doesn't support custom initializers (like initWithString)
alloc-init is more explicit than new
General opinion seems to be that you should use whatever you're comfortable with.
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cv2.imshow command doesn't work properly in opencv-python
...on 2.7
The following simple code created a window of the correct name, but its content is just blank and doesn't show the image:
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