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MySQL: Can't create table (errno: 150)
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From the MySQL - FOREIGN KEY Constraints Documentation:
If you re-create a table that was dropped, it must have a definition that conforms to the foreign key constraints referencing it. It must have the correct column nam...
How do I rename a Git repository?
...repository directory itself).
Rename the directory (for example, using mv from the command line or the F2 hotkey from a GUI).
Remote Repository
Rename a remote repository as follows:
Go to the remote host (for example, https://github.com/User/project).
Follow the host's instructions to rename ...
FormData.append(“key”, “value”) is not working
... 50+ and Firefox 39+ (resp. 44+):
formdata.entries() (combine with Array.from() for debugability)
formdata.get(key)
and more very useful methods
Original answer:
What I usually do to 'debug' a FormData object, is just send it (anywhere!) and check the browser logs (eg. Chrome devtools' Network ...
Flatten an irregular list of lists
... can use a tuple of str and bytes to get the same effect there.
The yield from operator returns an item from a generator one at a time. This syntax for delegating to a subgenerator was added in 3.3
def flatten(l):
for el in l:
if isinstance(el, collections.Iterable) and not isinstance(...
When to use Spring Integration vs. Camel?
... requirement Camel won. We use it mainly to transfer internal datafiles to/from external parties which usually requires format conversions sending it using ftp/sftp/... or attaching it to an email and sending it out.
We found the edit-compile-debug cycle reduced. Using groovy to experiment setting ...
Truncating floats in Python
I want to remove digits from a float to have a fixed number of digits after the dot, like:
29 Answers
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Apache Spark: map vs mapPartitions?
...only once. Even if the RDD is cached in RAM, that saves a lot of overhead from type conversion.
– Bob
Mar 27 '15 at 4:58
3
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Accessing UI (Main) Thread safely in WPF
... @l46kok This can have different reasons (console app, hosting from winforms etc.). As @WolfgangZiegler said, you can use any UIElement for it. I just usually use Application.Current for it since it looks cleaner to me.
– Botz3000
Jul 24 '12 at 6:51...
How to determine the encoding of text?
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Correctly detecting the encoding all times is impossible.
(From chardet FAQ:)
However, some encodings are optimized
for specific languages, and languages
are not random. Some character
sequences pop up all the time, while
other sequences make no sense. A
person fluent i...
Reading specific lines only
...-like object thefile (leaving up to the caller whether it should be opened from a disk file, or via e.g a socket, or other file-like stream) and a set of zero-based line indices whatlines, and returns a list, with low memory footprint and reasonable speed. If the number of lines to be returned is h...