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How to add multiple objects to ManyToMany relationship at once in Django ?
...o arguments, use *
add(*[obj1, obj2, obj3])
Addendum:
Django does not call obj.save() for each item but uses bulk_create(), instead.
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What is PEP8's E128: continuation line under-indented for visual indent?
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This is so ubiquitous in Django code I've seen (plus it's all over their docs) that it arguably supersedes PEP-8, after all it says "Many projects have their own coding style guidelines. In the event of any conflicts, such project-specific guides take precedence for that project."
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String.Join method that ignores empty strings?
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I had some luck with this instead: Array.FindAll(myArray, Function(s) Not String.IsNullOrEmpty(s)) Can you either change your answer or explain the Where statement?
– Doug
May 2 '13 at 13:44
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How to find the files that are created in the last hour in unix
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This is great and all, but these flags don't exist on Solaris find that I'm using. OP said Unix and I think these are Linux only.
– jiggy
Apr 17 '14 at 19:53
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Detect Chrome extension first run / update
...versions of Chrome (since Chrome 22), you can use the chrome.runtime.onInstalled event, which is much cleaner.
Example:
// Check whether new version is installed
chrome.runtime.onInstalled.addListener(function(details){
if(details.reason == "install"){
console.log("This is a first inst...
Git resolve conflict using --ours/--theirs for all files
Is there a way to resolve conflict for all files using checkout --ours and --theirs ? I know that you can do it for individual files but couldn't find a way to do it for all.
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What is hashCode used for? Is it unique?
...r is based on the
System.Collections.IEqualityComparer interface.
Basically, hash codes exist to make hashtables possible.
Two equal objects are guaranteed to have equal hashcodes.
Two unequal objects are not guaranteed to have unequal hashcodes (that's called a collision).
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std::back_inserter for a std::set?
...s2, s2.begin()), ExcitingUnaryFunctor());
The insert iterator will then call s2.insert(s2.begin(), x) where x is the value passed to the iterator when written to it. The set uses the iterator as a hint where to insert. You could as-well use s2.end().
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Why do I need 'b' to encode a string with Base64?
...-z, 0-9, +, /* so it can be transmitted over channels that do not preserve all 8-bits of data, such as email.
Hence, it wants a string of 8-bit bytes. You create those in Python 3 with the b'' syntax.
If you remove the b, it becomes a string. A string is a sequence of Unicode characters. base64 ha...
Where in memory are my variables stored in C?
...declared in functions), variables (in main function), pointers, and dynamically allocated space (using malloc and calloc) get stored in memory?
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