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Rails find record with zero has_many records associated [duplicate]
...147/492465 - also answers your question about constructing the inverse and does all this with Arel
– novemberkilo
Sep 29 '13 at 16:06
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How to check if a file is empty in Bash?
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Surely this will fail if the file does not exist either? This is supposed to be a check if the file is empty only.
– geedoubleya
Oct 5 '17 at 11:31
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How to rename files and folder in Amazon S3?
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There is no direct method to rename a file in S3. What you have to do is copy the existing file with a new name (just set the target key) and delete the old one.
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Benchmarking (python vs. c++ using BLAS) and (numpy)
...nchmark. There is no difference between C++ and numpy on my machine:
Do you think my approach is fair, or are there some unnecessary overheads I can avoid?
It seems fair due to there is no difference in results.
Would you expect that the result would show such a huge discrepancy between ...
Questions every good .NET developer should be able to answer? [closed]
...s . We work on a variety of .NET platforms: ASP.NET, Compact Framework, Windowsforms, Web Services. I'd like to compile a list/catalog of good questions, a kind of minimum standard to see if the applicants are experienced. So, my question is:
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What is SQL injection? [duplicate]
Can someone explain SQL injection? How does it cause vulnerabilities? Where exactly is the point where SQL is injected?
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How do I increase modal width in Angular UI Bootstrap?
...I use a css class like so to target the modal-dialog class:
.app-modal-window .modal-dialog {
width: 500px;
}
Then in the controller calling the modal window, set the windowClass:
$scope.modalButtonClick = function () {
var modalInstance = $modal.open({
templateUrl: 'Ap...
How do I build a numpy array from a generator?
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Why numpy.array doesn't do the memory allocation the same way as the builtin array.array, as Cuadue says. What is the tradeof? I ask because there is contiguous allocated memory in both examples. Or not?
– jgomo3
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A Java API to generate Java source files [closed]
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This looks awesome. How do you generate a method that returns another type that is being generated with CodeModel as well?
– András Hummer
Sep 11 '13 at 8:08
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How do I exchange keys with values in a dictionary?
...e python2 code works... but the list comprehension is missing the [ and ]. does a list comprehension not require the [ and ]?
– Trevor Boyd Smith
Nov 29 '18 at 17:37
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