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Is there a REAL performance difference between INT and VARCHAR primary keys?
... and a coworker won't budge on the INT AUTO_INCREMENT as a primary key for all tables.
14 Answers
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remove legend title in ggplot
...
This will remove all legend titles. For more local control, the guide = guide_legend() command works. To remove the fill legend title, but to keep the color legend title, e.g. scale_fill_brewer(palette = "Dark2", guide = guide_legend(title = ...
Send message to specific client with socket.io and node.js
..."I'm the master", function() {
// Save the socket id to Redis so that all processes can access it.
client.set("mastersocket", socket.id, function(err) {
if (err) throw err;
console.log("Master socket is now" + socket.id);
});
});
socket.on("message to master", function(...
Numpy index slice without losing dimension information
...y an array that might be length 1 at runtime. For that case, there's np.ix_:
some_array[np.ix_(row_index,column_index)]
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Extracting Nupkg files using command line
Firstly, I do not want to use Visual Studio at all when dealing with the certain .nupkg files.
6 Answers
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Getting the count of unique values in a column in bash
... count the frequency of occurrence of the different values in a column for all the files in a folder and sort them in decreasing order of count (highest count first). How would I accomplish this in a Linux command line environment?
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Passing command line arguments from Maven as properties in pom.xml
... </activation>
<properties>
<build_os>linux</build_os>
<build_ws>gtk</build_ws>
<build_arch>x86_64</build_arch>
</properties>
</profile>
<profile>
<id>wi...
How do you create an asynchronous method in C#?
...what if that is not the case. What if were trying to wrap some code that calls BeginInvoke with some callback code?
– Ricibob
Aug 27 '13 at 10:46
2
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Booleans, conditional operators and autoboxing
...a.lang.Exception;
descriptor: ([Ljava/lang/String;)V
flags: ACC_PUBLIC, ACC_STATIC
Code:
stack=2, locals=2, args_size=1
0: invokestatic #2 // Method returnsNull:()Ljava/lang/Boolean;
3: invokevirtual #3 // Method java...
Vim Regex Capture Groups [bau -> byau : ceu -> cyeu]
...ter (and more magic-al) is to use \v, meaning that in the pattern after it all ASCII characters except '0'-'9', 'a'-'z', 'A'-'Z' and '_' have a special meaning:
:%s/\v(\w)(\w\w)/\1y\2/g
See:
:help \(
:help \v
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