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How can I temporarily disable a foreign key constraint in MySQL?
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This worked for me after trying the 'best answer' didn't work for me. Perhaps an explanation of the difference could be added.
– hexnet
Aug 27 '15 at 12:37
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Add legend to ggplot2 line plot
...names = c(NA, 20L), class = "data.frame")
You can get the desired effect by (and this also cleans up the original plotting code):
ggplot(data = datos, aes(x = fecha)) +
geom_line(aes(y = TempMax, colour = "TempMax")) +
geom_line(aes(y = TempMedia, colour = "TempMedia")) +
geom_line(aes(y = ...
The entitlements specified…profile. (0xE8008016). Error iOS 4.2
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By the way, check that you specify correct sign identity exactly in Target -> Build Settings, not in Project. Target overrides the Project. I've forgot about this and got 0xE8008016 error message.
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Storing Image Data for offline web application (client-side storage database)
...lmost all browsers) for blob download from web server
I went with XHR2-Lib by Phil Parsons, which is very much like JQUERY .ajax()
https://github.com/p-m-p/xhr2-lib
Storage
IndexedDB for IE and FireFox
Chrome: Polyfill (blob stored using FileSystem API, reference kept in IndexedDB) polyfill
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How do I remove the first characters of a specific column in a table?
... had trailing spaces in your text. You can compensate for that if you want by using RTRIM & LTRIM.
– Spazmoose
May 13 '19 at 18:14
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ActiveRecord: size vs count
...g is not as efficient as it will load all records from the database into Ruby, which then counts the size of the collection.
records = Model.all
records.size
If your models have associations and you want to find the number of belonging objects (e.g. @customer.orders.size), you can avoid database ...
How can I bind to the change event of a textarea in jQuery?
...to gain a new, cross-browser compatible textchange event. It was developed by the same person who implemented the equivalent onChange event for Facebook's ReactJS, which they use for nearly their entire website. And I think it's safe to say, if it's a robust enough solution for Facebook, it's probab...
Get all Attributes from a HTML element with Javascript/jQuery
...attributes node list on the element itself:
var el = document.getElementById("someId");
for (var i = 0, atts = el.attributes, n = atts.length, arr = []; i < n; i++){
arr.push(atts[i].nodeName);
}
Note that this fills the array only with attribute names. If you need the attribute value, you...
Maven – Always download sources and javadocs
...e ... -->
<profiles>
<profile>
<id>downloadSources</id>
<properties>
<downloadSources>true</downloadSources>
<downloadJavadocs>true</downloadJavadocs>
</proper...
How can you find the height of text on an HTML canvas?
...nd descent from the baseline, i.e. same as tmAscent and tmDescent returned by Win32's GetTextMetric API. This is needed if you want to do a word-wrapped run of text with spans in different fonts/sizes.
The above image was generated on a canvas in Safari, red being the top line where the canvas wa...