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What's the magic of “-” (a dash) in command-line parameters?
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edited Nov 8 '11 at 3:15
answered Nov 8 '11 at 3:09
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Python - When to use file vs open
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153
You should always use open().
As the documentation states:
When opening a file, it's prefer...
How to convert list of key-value tuples into dictionary?
...injagecko
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how to return index of a sorted list? [duplicate]
...e sorted items in the list. For example, if the list I want to sort is [2,3,1,4,5] , I need [2,0,1,3,4] to be returned.
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RegEx - Match Numbers of Variable Length
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135
{[0-9]+:[0-9]+}
try adding plus(es)
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Using async/await for multiple tasks
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int[] ids = new[] { 1, 2, 3, 4, 5 };
Parallel.ForEach(ids, i => DoSomething(1, i, blogClient).Wait());
Although you run the operations in parallel with the above code, this code blocks each thread that each operation runs on. For example, if the ...
Efficient way to apply multiple filters to pandas DataFrame or Series
...'col1'] >= 1]
Out[12]:
col1 col2
1 1 11
2 2 12
In [13]: df[(df['col1'] >= 1) & (df['col1'] <=1 )]
Out[13]:
col1 col2
1 1 11
If you want to write helper functions for this, consider something along these lines:
In [14]: def b(x, col, op, n):
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creating list of objects in Javascript
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var list = [
{ date: '12/1/2011', reading: 3, id: 20055 },
{ date: '13/1/2011', reading: 5, id: 20053 },
{ date: '14/1/2011', reading: 6, id: 45652 }
];
and then access it:
alert(list[1].date);
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Generate a UUID on iOS from Swift
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635
Try this one:
let uuid = NSUUID().uuidString
print(uuid)
Swift 3/4/5
let uuid = UUID().uuid...