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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
... aren't valid labels, for example:
h = { 'where is': 'pancakes house?', '$set': { a: 11 } }
But you still need the hashrocket if your keys are not symbols.
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What is the difference between save and export in Docker?
...ve been deleted or overridden.
Flattened images contain only the current set of files on the filesystem.
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How often does python flush to a file?
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Thanks! It's good to know that python sets it as OS defines... but this helps find out what the OS pre-defines.
– Cometsong
Mar 28 '18 at 13:43
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Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
... I get following warning when doing new column creation like that: "SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame. Try using .loc[row_indexer,col_indexer] = value instead." Should I be worried about that? pandas v.0.15
– taras...
What is the right way to override a setter method in Ruby on Rails?
... to know if the following is a "proper"/"correct"/"sure" way to override a setter method for a my class attribute.
5 Answer...
How to call any method asynchronously in c#
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How would I use this technique and have a timeout set?
– Su Llewellyn
Jun 17 at 18:22
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Is multiplication and division using shift operators in C actually faster?
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@Ivan: And "(hi << 8) | lo" is even more clear. Setting the low bits of a bit array is not addition of integers. It is setting bits, so write the code that sets bits.
– Eric Lippert
Jun 16 '11 at 6:59
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Can I serve multiple clients using just Flask app.run() as standalone?
...o of those arguments are threaded (a boolean) and processes (which you can set to a number greater than one to have werkzeug spawn more than one process to handle requests).
threaded defaults to True as of Flask 1.0, so for the latest versions of Flask, the default development server will be able t...
What exactly does stringstream do?
...ich returns the contents of its buffer in string type.
str(string), which set the contents of the buffer to the string argument.
Here is an example of how to use string streams.
ostringstream os;
os << "dec: " << 15 << " hex: " << std::hex << 15 << endl;
cout ...
Split string into an array in Bash
...e an element or add an element and then the indices are not contiguous.
unset "array[1]"
array[42]=Earth
To get the number of elements in an array:
echo "${#array[@]}"
As mentioned above, arrays can be sparse so you shouldn't use the length to get the last element. Here's how you can in Bash 4...