underscore | underscore.js中文注释 - underscore | Frontend Framework library
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underscore.js中文注释
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QUESTION
We have thousands of structured filenames stored in our database, and unfortunately many hundreds have been manually altered to names that do not follow our naming convention. Using regex, I'm trying to match the correct file names in order to identify all the misnamed ones. The files are all relative to a meeting agenda, and use the date, meeting type, Agenda Item#, and description in the name.
Our naming convention is yyyymmdd_aa[_bbb]_ccccc.pdf
where:
- yyyymmdd is a date (and may optionally use underscores such as yyyy_mm_dd)
- aa is a 2-3 character Meeting Type code
- bbb is an optional Agenda Item
- ccccc is a freeform variable length description of the file (alphanumeric only)
Example filenames:
...ANSWER
Answered 2021-Jun-15 at 17:46The optional identifier ?
is for the last thing, either a characters or group. So the expression ([a-z0-9]{1,3})_?
makes the underscore optional, but not the preceding group. The solution is to move the underscore into the parenthesis.
QUESTION
I wish to move a large set of files from an AWS S3 bucket in one AWS account (source), having systematic filenames following this pattern:
...ANSWER
Answered 2021-Jun-15 at 15:28You can use sort -V
command to consider the proper versioning of files and then invoke copy command on each file one by one or a list of files at a time.
ls | sort -V
If you're on a GNU system, you can also use ls -v
. This won't work in MacOS.
QUESTION
I'm using create-react-app and have configured my project for eslint. Below is my .eslintrc file.
...ANSWER
Answered 2021-Jun-15 at 12:54You can do it by adding DISABLE_ESLINT_PLUGIN=true
to the "build" in the "scripts" part in your package.json
:
QUESTION
I'm confused why a type that implements comparable
isn't "implicitly comparable", and also why certain syntaxes of sortWith
won't compile at all:
ANSWER
Answered 2021-Jun-11 at 10:35// Works but won't sort eq millis
val records = iter.toArray.sortWith(_.event_time.getTime < _.event_time.getTime)
QUESTION
I a trying to convert a decimal number into a 17-bit binary number and add underscore as a separator in it. I am using the following code -
...ANSWER
Answered 2021-Jun-14 at 17:37One way:
QUESTION
I am trying to write a regular expression for an ID which comes in the following formats:
7_b4718152-d9ed-4724-b3fe-e8dc9f12458a
b4718152-d9ed-4724-b3fe-e8dc9f12458a
[a_][b]-[c]-[d]-[e]-[f]
a
- optional 0-3 digits followed by an underscore if there's at least a digit (if there is underscore is required)b
- 8 alphanumeric charactersc
- 4 alphanumeric charactersd
- 4 alphanumeric characterse
- 4 alphanumeric charactersf
- 12 alphanumeric characters
I have came up with this regexp but I would appreciate any guidance and/or corrections. I am also not too sure how to handle the optional underscore in the first segment if there are no digits up front.
/([a-zA-Z0-9]{0,3}_[a-zA-Z0-9]{8}-[a-zA-Z0-9]{4}-[a-zA-Z0-9]{4}-[a-zA-Z0-9]{4}-[a-zA-Z0-9]{12})+/g
ANSWER
Answered 2021-Jun-14 at 07:27Your regex looks good. To optionally match the first 3 digits with an underscore, you can wrap that group with ()?
. Also you can force the presence of a digit before the underscore by using {1,3}
instead of {0,3}
.
Unless you expect that multiple identifiers are following each other without space and should be matched as one, you can drop the last +
(for multiple matches on the same line, you already have the g
option).
The final regex is ([a-zA-Z0-9]{1,3}_)?[a-zA-Z0-9]{8}-[a-zA-Z0-9]{4}-[a-zA-Z0-9]{4}-[a-zA-Z0-9]{4}-[a-zA-Z0-9]{12}
See here for a complete example.
If you also do not need to capture the individual 4-alphanumeric groups, you can simplify your regex into:
([a-zA-Z0-9]{1,3}_)?[a-zA-Z0-9]{8}-([a-zA-Z0-9]{4}-){3}[a-zA-Z0-9]{12}
See here for an example.
QUESTION
I have created a class for managing subscriptions to a messaging service. The class instantiates three separate clients for reasons related to the configuration for each subscription, also three per instance of the class. To reduce the instantiation of the three clients to one for loop, I've used __getattribute__
and __setattr__
. I've read other threads about these methods, and I'm not sure if using them as I have could lead to issues. Here is a very simplified example:
ANSWER
Answered 2021-Jun-13 at 20:37Instead of using the dunder methods __setattr__
/__getattr__
(or __getattribute__
), you should use getattr(self, client)
and setattr(self, client, value)
...
but better yet, you should just use a dict if you need to map names to objects.
QUESTION
We are given a data frame that may look like this (I am sorry I wasn't able to show the data frame given the code below):
...ANSWER
Answered 2021-Jun-12 at 11:40try:
QUESTION
I just began learning Airflow, but it is quite difficult to grasp the concept of Xcom. Therefore I wrote a dag like this:
...ANSWER
Answered 2021-Jun-11 at 06:01The command parameter
of SSHOperator
is templated thus you can get the xcom directly:
QUESTION
I'm trying to Deserialize a date correctly from json.
The date format is like this:
...ANSWER
Answered 2021-Jun-12 at 00:20Turns out System.Text.Json isn’t the issue here, but more the solution.
I’ve removed the using for Newtonsoft.Json.Converters and replaced it with System.Text.Json. Then used the JsonSerializer to Deserialize.
Also removed the IsoDateTimeConverter code.
This seems to work - https://dotnetfiddle.net/UEE3QD
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