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Core Data: Quickest way to delete all instances of an entity
... without having to load them all in to memory. Here's how you'd use it:
Swift 5
let fetchRequest: NSFetchRequest<NSFetchRequestResult> = NSFetchRequest(entityName: "Car")
let deleteRequest = NSBatchDeleteRequest(fetchRequest: fetchRequest)
do {
try myPersistentStoreCoordinator.execute(d...
How to display a content in two-column layout in LaTeX?
...se:
\begin{multicols}{2}
Column 1
\columnbreak
Column 2
\end{multicols}
If you omit the \columnbreak, the columns will balance automatically.
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How to create named and latest tag in Docker?
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This works well with something like REV=$(hg identify --num)
– analytik
Jun 3 '15 at 13:41
2
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Turning multi-line string into single comma-separated
...se awk and sed:
awk -vORS=, '{ print $2 }' file.txt | sed 's/,$/\n/'
Or if you want to use a pipe:
echo "data" | awk -vORS=, '{ print $2 }' | sed 's/,$/\n/'
To break it down:
awk is great at handling data broken down into fields
-vORS=, sets the "output record separator" to ,, which is what ...
What is the purpose of backbone.js?
...way. i.e. it does not set data- attributes back onto the DOM elements. (So if your HTML had data- attributes when the page loaded, and they are changed, the DOM and the in-memory representation would be OOS - but you should be working with the in-mem data anyway)
– JoeBrockhaus...
Best way to convert strings to symbols in hash
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Ah, sorry for being unclear - inject doesn't modify the caller. You need to do my_hash = my_hash.inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}
– Sarah Mei
Apr 29 '09 at 19:06
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Can scripts be inserted with innerHTML?
...d escaping your content, as well as a bunch of other "gotchas".
Generally if you're going to eval() it yourself, you want to create/send the script code without any HTML markup such as <script>, as these will not eval() properly.
...
Suppress properties with null value on ASP.NET Web API
...onSerializerSettings {NullValueHandling = NullValueHandling.Ignore};
Or, if you want more control, you can replace entire formatter:
var jsonformatter = new JsonMediaTypeFormatter
{
SerializerSettings =
{
NullValueHandling = NullValueHandling.Ignore
}
};
config.Formatters.Rem...
How to add JTable in JPanel with null layout?
... SwingUtilities.updateComponentTreeUI(frame);
if (pack.isSelected()) {
frame.pack();
frame.setMinimumSize(frame.getSize());
}
} catch(Exception e) {
...
What is the difference between Cygwin and MinGW?
...t cross platform, and I'm considering using Cygwin/MinGW.
But what is the difference between them ?
16 Answers
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