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Is it possible to create a “weak reference” in javascript?
...e’ becomes a key (eg. integer) in a simple lookup, with an add-reference and remove-reference method, and when there are no manually-tracked references anymore then entry can be deleted, leaving future lookups on that key to return null.
This is not really a weakref, but it can solve some of the ...
Creating a zero-filled pandas data frame
What is the best way to create a zero-filled pandas data frame of a given size?
6 Answers
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Ruby on Rails: getting the max value from a DB column
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Assuming your model name is Bar and it has a column named bar, this should work:
Bar.maximum("bar")
See the excellent Rails Guides section on Calculations for more info.
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UI Design Pattern for Windows Forms (like MVVM for WPF)
...ectly suited for it. But what about Windows Forms? Is there an established and commonly used approach / design pattern like this for Windows Forms too? One that works explicitly well with Windows Forms? Is there a book or an article that describes this well? Maybe MVP or MVC based?
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Simulate first call fails, second call succeeds
...ion()).doNothing().when(myMock).doTheCall();
– haggisandchips
Sep 13 '16 at 15:04
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How do you reindex an array in PHP?
... answered Feb 26 '09 at 16:07
Andrew MooreAndrew Moore
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Why git keeps showing my changes when I switch branches (modified,added, deleted files) no matter if
I'm really new to git and I've been trying to understand why git keeps showing whatever I changed in one branch in another branch when I run git checkout to switch between branches First I tried not using git add and didn't work. However, I tried then using git add, but didn't fix the problem. I'm n...
How to get thread id from a thread pool?
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@petrbel He's answering the question title perfectly, and the thread id is close enough in my opinion when the OP requests "something like 'thread #3 of 5".
– CorayThan
Sep 1 '15 at 19:20
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Best way to clear a PHP array's values
...r the memory a bit better. That behavior (GC) is however not very constant and may change over PHP versions.
– Eric Herlitz
Nov 10 '14 at 11:52
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Counting array elements in Python [duplicate]
...index of array? for example, when I'm looping that array, i get some index and how to know how much index is in?
– isnaini barochatun
May 9 at 13:06
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