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What is opinionated software?
...ous options easier. e.g. Visual Studio .NET for .NET, Eclipse IDE for Java etc. Unopinionated software typically takes longer to master than opinionated software.
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What's the difference between echo, print, and print_r in PHP?
...ngs are not quoted, type information is omitted, array sizes aren't given, etc.
var_dump is usually more useful than print_r when debugging, in my experience. It's particularly useful when you don't know exactly what values/types you have in your variables. Consider this test program:
$values = ar...
How to Iterate over a Set/HashSet without an Iterator?
...therwise specified by the implementing class, actions are performed in the order of iteration (if an iteration order is specified). Exceptions thrown by the action are relayed to the caller. Implementation Requirements:
The default implementation behaves as if:
for (T t : this)
action.accept...
Why is the Windows cmd.exe limited to 80 characters wide?
I love stretching my terminal on unix. What is the history or reason behind windows lame command line?
14 Answers
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Multiline strings in VB.NET
...5.
Dim sql As String = "
SELECT ID, Description
FROM inventory
ORDER BY DateAdded
"
You can combine them with string interpolation to maximize usefullness:
Dim primaryKey As String = "ID"
Dim inventoryTable As String = "inventory"
Dim sql As String = $"
SELECT {primaryKey}, Descrip...
How can I add a column that doesn't allow nulls in a Postgresql database?
...row. Not sure how Postgres locks up a table when doing this. Or, if column order matters, you can't just add a column with the ALTER command.
– alphadogg
Feb 5 '09 at 14:31
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How can I strip first X characters from string using sed?
...aces are used to concatenate the string with valid variable characters, in order to distinguish what is the variable and what isn't. If you want more information on this, then look up "bash variable string concatenation" for more resources on why / how this works.
– JustCarty
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Comparing two dataframes and getting the differences
...hod, and exception is raised if differences found, even in columns/indices order.
If I got you right, you want not to find changes, but symmetric difference. For that, one approach might be concatenate dataframes:
>>> df = pd.concat([df1, df2])
>>> df = df.reset_index(drop=True)
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Running JAR file on Windows
I have a JAR file named helloworld.jar .
In order to run it, I'm executing the following command in a command-line window:
...
What's the difference between SCSS and Sass?
...in the most popular CSS frameworks like Bootstrap, Foundation, Materialize etc. The main UI frameworks favor scss over sass by default - Angular, React, Vue. Any tutorials or demos will generally use scss e.g create-react-app facebook.github.io/create-react-app/docs/…
– Drena...