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Select distinct values from a table field
I'm struggling getting my head around the Django's ORM. What I want to do is get a list of distinct values within a field on my table .... the equivalent of one of the following:
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Pointer to class data member “::*”
...olve some tricky problems. But to be honest, I've never had to use them in my own code.
Edit: I can't think off-hand of a convincing use for pointers to member data. Pointer to member functions can be used in pluggable architectures, but once again producing an example in a small space defeats me....
Red black tree over avl tree
...ted as binary trees, the red/black-flags simulate 2-3 behaviour
As far as my own understanding goes, AVL trees and RB trees are not very far off in terms of performance. An RB tree is simply a variant of a B-tree and balancing is implemented differently than an AVL tree.
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How to convert lazy sequence to non-lazy in Clojure
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This is to some degree a question of taxonomy. a lazy sequence is just one type of sequence as is a list, vector or map. So the answer is of course "it depends on what type of non lazy sequence you want to get:
Take your pick from:
an ex-lazy (fully evaluated) la...
How To Capture A Minidump: Let Me Count The Ways - C/C++ - 清泛网 - 专注C/C++及内核技术
...as grabbing on a very large and busy server application to finish writing, my mind wandered and I realized there were quite a few ways to grab a minidump today. Back in the old Windows days, when we had to program up hill in the snow both ways, there was only WinDBG. Now it seems like an application...
How to load program reading stdin and taking parameters in gdb?
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If you were doing it from a shell you'd do it like this:
% gdb myprogram
gdb> run params ... < input.txt
This seems to work within emacs too.
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Vertically align an image inside a div with responsive height
...anel to see the effect.
Also, we could apply the padding property to a dummy child or :before/:after pseudo-element to achieve the same result. But note that in this case, the percentage value on padding is relative to the width of the .responsive-container itself.
<div class="responsive-contai...
What's the best way to get the current URL in Spring MVC?
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In my case it gives the related view path instead of browse url. Any idea about this?
– Md. Shougat Hossain
Aug 5 '18 at 16:04
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How can I find where I will be redirected using cURL?
...emember: (ok, duh) POST data will not be re-submitted after a redirect. In my case this happened and I felt stupid afterwards because: just use the appropriate url and it's fixed.
– twicejr
May 22 '17 at 17:57
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Fixed position but relative to container
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what about without fixed height and width ? In my case I haven't given any signal width to any container even up to body tag. What solution you will say me to do.
– mfq
Feb 21 '13 at 7:30
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