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demystify Flask app.secret_key
... computer. The secret plus the data-to-sign are used to create a signature string, a hard-to-recreate value using a cryptographic hashing algorithm; only if you have the exact same secret and the original data can you recreate this value, letting Flask detect if anything has been altered without per...
How to prevent caching of my Javascript file? [duplicate]
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Add a random query string to the src
You could either do this manually by incrementing the querystring each time you make a change:
<script src="test.js?version=1"></script>
Or if you are using a server side language, you could ...
How to get the current date/time in Java [duplicate]
...at YYYY.MM.DD-HH.MM.SS (very frequent case) then here's the way to do it:
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(Calendar.getInstance().getTime());
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Proper package naming for testing with the Go language
...o the standard library can be tested with the same mechanism. For example, strings cannot be tested with strategy 1 since the testing package depends on strings. As you said, with strategy 2 or 3 you don't have access to the package's private identifiers, so it's usually better to not use it unless ...
Writing your own STL Container
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Code is runnable out of the box.
#include <iostream>
#include <string>
#include <vector>
template<typename T>
struct It
{
std::vector<T>& vec_;
int pointer_;
It(std::vector<T>& vec) : vec_{vec}, pointer_{0} {}
It(std::vector<T>&...
Int or Number DataType for DataAnnotation validation attribute
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This is the better solution, since this covers strings. int.MaxValue only covers until 2.147.483.647
– Christian Gollhardt
Aug 19 '15 at 17:51
add ...
Git pre-push hooks
...th pre-commit hooks. Apart from protecting a branch, they can also provide extra security combined with pre-commit hooks.
And for an example on how to use (taken and adopted and enhanced from this nice entry)
Simple example to login to vagrant, run tests and then push
#!/bin/bash
# Run the follo...
Setting Environment Variables for Node to retrieve
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If you are looking for extra safety then github.com/rolodato/dotenv-safe and a few tests should do it.
– ctrlplusb
Jan 13 '16 at 23:35
...
Text-align class for inside a table
...gt;
<p class="text-xl-left">Left aligned text on viewports sized XL (extra-large) or wider.</p>
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How to prevent form resubmission when page is refreshed (F5 / CTRL+R)
...reventing redirects) you can hash some of the request parameters to make a string based on the content and then check that you haven't sent it already.
//create digest of the form submission:
$messageIdent = md5($_POST['name'] . $_POST['email'] . $_POST['phone'] . $_POST['comment']);
//and ch...