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How to copy a dictionary and only edit the copy
...re making them refer to the same exact dict object, so when you mutate it, all references to it keep referring to the object in its current state.
If you want to copy the dict (which is rare), you have to do so explicitly with
dict2 = dict(dict1)
or
dict2 = dict1.copy()
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Session timeout in ASP.NET
...kieless="true" then ASP.NET maintains cookieless session state by automatically inserting a unique session ID into the page's URL.
– Hamza Khanzada
Aug 28 '19 at 11:00
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Save image from URL by paperclip
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This is potentially insecure because a user could call user.picture_from_url('/etc/password'). It's probably fine in most situations though.
– David Tuite
Oct 11 '13 at 9:16
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How to drop a list of rows from Pandas dataframe?
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this doesnt allow you to index on the index name itself
– ingrid
Nov 2 '16 at 20:33
47
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Why can't I use float value as a template parameter?
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The current C++ standard does not allow float (i.e. real number) or character string literals to be used as template non-type parameters. You can of course use the float and char * types as normal arguments.
Perhaps the author is using a compiler that doesn...
not:first-child selector
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One of the versions you posted actually works for all modern browsers (where CSS selectors level 3 are supported):
div ul:not(:first-child) {
background-color: #900;
}
If you need to support legacy browsers, or if you are hindered by the :not selector's...
Comparing arrays in JUnit assertions, concise built-in way?
...dResult, result );
If this method is not available, you may have accidentally imported the Assert class from junit.framework.
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Why in Java 8 split sometimes removes empty strings at start of result array?
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The behavior of String.split (which calls Pattern.split) changes between Java 7 and Java 8.
Documentation
Comparing between the documentation of Pattern.split in Java 7 and Java 8, we observe the following clause being added:
When there is a positive-width...
What is the difference between Hibernate and Spring Data JPA
...nd the top level i.e. Spring Data JPA. With the first exception you potentially have to know the lower levels i.e. Hibernate, JDBC and the Database.
– Marmite Bomber
Aug 13 '19 at 16:26
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What is 'Currying'?
...like the add(3, 4) statement. The second statement defines a new function called add3 that will add 3 to its argument. This is what some people may call a closure. The third statement uses the add3 operation to add 3 to 4, again producing 7 as a result.
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