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Can PostgreSQL index array columns?
...l columns for each element (and plain btree indices) instead of building a more expensive expression index for each array item. Storage of individual columns is much cheaper without array overhead, too.
– Erwin Brandstetter
Mar 25 '15 at 1:09
...
What are queues in jQuery?
... next();
}
});
// after we find stack overflow, wait 3 more seconds
$map.delay(3000);
// and resize the map again
$map.animate({
width: 500,
height: 500,
marginLeft:0,
marginTop: 0
}, resized);
});
Another custom queue example
Ru...
How to concatenate twice with the C preprocessor and expand a macro as in “arg ## _ ## MACRO”?
...on-like macro invocations, before the replacement list is
reexamined for more macro names to replace, each instance of a ## preprocessing token
in the replacement list (not from an argument) is deleted and the preceding preprocessing
token is concatenated with the following preprocessing token...
Calling clojure from java
...was written in 2010, and worked at that time. See Alex Miller's answer for more modern solution.
What kind of code are calling from Java? If you have class generated with gen-class, then simply call it. If you want to call function from script, then look to following example.
If you want to evalua...
How to get the input from the Tkinter Text Widget?
...
To get Tkinter input from the text box, you must add a few more attributes to the normal .get() function. If we have a text box myText_Box, then this is the method for retrieving its input.
def retrieve_input():
input = self.myText_Box.get("1.0",END)
The first part, "1.0" mean...
How to add a custom right-click menu to a webpage?
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How can I plot with 2 different y-axes?
... @BenBolker your solution is genius! however i have one question. If it's more than one line on the both sides, I am still able to use this method but only with symbols. When I try to use line=plot, it tries to plot them continuously. Would you happen to suggest a trick to fix this?
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Vertical (rotated) text in HTML table
...s simplified the rule set to drop legacy Internet Explorer filter and rely more in the now standard transform property:
.box_rotate {
-webkit-transform: rotate(7.5deg); /* Chrome, Opera 15+, Safari 3.1+ */
-ms-transform: rotate(7.5deg); /* IE 9 */
transform: rotate(7.5deg...
What is context in _.each(list, iterator, [context])?
...ith "e" or sooner:
_.filter(words, lt, "e");
// find all words with 3 or more chars:
_.filter(words, pluck, 2);
Even from the limited examples, you can see how powerful an "extra argument" can be for creating re-usable code. Instead of making a different callback function for each situation, yo...
C++ Modules - why were they removed from C++0x? Will they be back later on?
...co-exist and headers can still be used for example to include macros.
For more detailed information I suggest to read the draft.
Clang Modules
Clang has been working on a modules implementation which can be found at the clang modules page. However clang does currently not implement a concrete syn...