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What is the $$hashKey added to my JSON.stringify result
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and if you have a filter to apply, here is the correct order: item in somelist | filter:somefilter track by item.key, don't write the filter at the end of the line !
– Lewen
Mar 22 '16 at 21:16
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python design patterns [closed]
...called, appear when similar problems are addressed using a dynamic, higher-order, object-oriented programming language. Some of the patterns disappear -- that is, they are supported directly by language features, some patterns are simpler or have a different focus, and some are essentially unchanged...
What is the !! (not not) operator in JavaScript?
...bject is truthy
!![] === true // an (empty) array is truthy; PHP programmers beware!
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Pandas - Get first row value of a given column
.... See below for an explanation of why. Because a subtle difference in
the order of indexing makes a big difference in behavior, it is better to use single indexing assignment:
df.iloc[0, df.columns.get_loc('Btime')] = x
df.iloc[0, df.columns.get_loc('Btime')] = x (recommended):
The recommende...
Alter MySQL table to add comments on columns
... information_schema.columns
WHERE
table_schema = 'my_database_name'
ORDER BY table_name , column_name
Export all to a CSV
Open it on your favorite csv editor
Note: You can improve to only one table if you prefer
The solution given by @Rufinus is great but if you have auto increments it wil...
Should I use Vagrant or Docker for creating an isolated environment? [closed]
... same file system.
You can use Dockerfile with the docker build command in order to handle the provisioning and configuration of your container. You have an example at docs.docker.com on how to make your Dockerfile; it is very intuitive.
The only reason you could want to use Vagrant is if you need ...
How to import CSV file data into a PostgreSQL table?
... using zip_codes(col1, col2, col3). The columns must be listed in the same order that they appear in the file.
– David Pelaez
Jan 2 '13 at 5:16
6
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Why is “import *” bad?
..."might shadow some other object from previous import"): import * makes the order of the import statements significant... even for standard library modules that don't normally care about import order. Something as innocent as alphabetizing your import statements could break your script when a former...
“Eliminate render-blocking CSS in above-the-fold content”
...elped me to get rid of "Render Blocking CSS". I used the following code in order to remove "Render Blocking CSS". Now in google page speed insight I am not getting issue related with render blocking css.
<!-- loadCSS -->
<script src="https://cdn.rawgit.com/filamentgroup/loadCSS/6b637fe0/sr...
AtomicInteger lazySet vs. set
... structures. The semantics are
that the write is guaranteed not to be re-ordered with any
previous write, but may be reordered with subsequent operations
(or equivalently, might not be visible to other threads) until
some other volatile write or synchronizing action occurs).
The main us...