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How do I format a date in Jinja2?
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There are two ways to do it. The direct approach would be to simply call (and print) the strftime() method in your template, for example
{{ car.date_of_manufacture.strftime('%Y-%m-%d') }}
Another, sightly better approach would be to define your own filter, e.g.:
from flask import Flask
import b...
Run a callback only if an attribute has changed in Rails
...ods/Dirty.html
Before Saving (OPTIONAL CHANGE)
After modifying an object and before saving to the database, or within the before_save filter:
changes should now be changes_to_save
changed? should now be has_changes_to_save?
changed should now be changed_attribute_names_to_save
<attribute>_...
Python pandas: fill a dataframe row by row
The simple task of adding a row to a pandas.DataFrame object seems to be hard to accomplish. There are 3 stackoverflow questions relating to this, none of which give a working answer.
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SLF4J: Class path contains multiple SLF4J bindings
... to find out how log4j is getting on your path run mvn dependency:tree and comb through, then add the snippet above to that dependency in your pom.xml
– cyber-monk
Sep 15 '15 at 15:11
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How does “304 Not Modified” work exactly?
...e then does the browser need to make the request? (as it could stub in 304 and not make the request at all)... you want this e.g. with "fingerprinted" assets (they're good forever). Else what's the point of max-age...
– Andy Hayden
Apr 6 '16 at 7:16
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awk without printing newline
...%s",whatever You forgot the comma. You can also extend with more variables and separate them with a comma.
– Hielke Walinga
Aug 7 '18 at 11:27
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How do I run a batch script from within a batch script?
...ile.bat
This will block (pause) the execution of the current batch file, and it will wait until the CALLed one completes.
If you don't want it to block, use START instead.
Get the nitty-gritty details by using CALL /? or START /? from the cmd prompt.
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NUnit's Assert.Equals throws exception “Assert.Equals should not be used for assertions”
...ss in a unit test is certainly a mistake. In order to prevent this mistake and avoid confusion, the developers of NUnit have intentionally hidden Object.Equals in the Assert class with an implementation that throws an exception. Here's the implementation:
/// <summary>
/// The Equals method t...
NodeJS require a global module/package
I'm trying to install globally and then use forever and forever-monitor like this:
8 Answers
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Rerender view on browser resize with React
...height}</span>;
}
The advantage here is the logic is encapsulated, and you can use this Hook anywhere you want to use the window size.
Using React classes:
You can listen in componentDidMount, something like this component which just displays the window dimensions (like <span>Window ...