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ETag vs Header Expires
...e inodes as part of the calculation but then you'd want to make sure the timestamps on the files are exactly the same, to ensure the same ETag gets generated for all servers.
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WPF: ItemsControl with scrollbar (ScrollViewer)
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@Ristogod If you host the ScrollViewer inside something that lets its content grow as much as needed, for example a StackPanel, scrolling will not work. What's the parent container? Try setting a fixed height on either the ScrollViewer or the parent, does that help?
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Calling startActivity() from outside of an Activity?
... yes this works. but if you want to start multiple instances of the same Activity this does not work. Since the FLAG_ACTIVITY_NEW_TASK will resume the same existing Activity
– Ovidiu Latcu
Sep 30 '11 at 13:16
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What does a \ (backslash) do in PHP (5.3+)?
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\ (backslash) is the namespace separator in PHP 5.3.
A \ before the beginning of a function represents the Global Namespace.
Putting it there will ensure that the function called is from the global namespace, even if there is a function by the ...
jQuery .live() vs .on() method for adding a click event after loading dynamic html
I am using jQuery v.1.7.1 where the .live() method is apparently deprecated.
7 Answers
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Group by multiple columns in dplyr, using string vector input
...nce this question was posted, dplyr added scoped versions of group_by (documentation here). This lets you use the same functions you would use with select, like so:
data = data.frame(
asihckhdoydkhxiydfgfTgdsx = sample(LETTERS[1:3], 100, replace=TRUE),
a30mvxigxkghc5cdsvxvyv0ja = sample(LET...
Boolean Field in Oracle
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I found this link useful.
Here is the paragraph highlighting some of the pros/cons of each approach.
The most commonly seen design is to imitate the many Boolean-like
flags that Oracle's data dictionary views use, selecting 'Y' for true
and 'N' for false. However, to interact cor...
How can I print a circular structure in a JSON-like format?
... a = {b:1}
var o = {};
o.one = a;
o.two = a;
// one and two point to the same object, but two is discarded:
JSON.stringify(o, ...);
But the concept stands: Use a custom replacer, and keep track of the parsed object values.
As a utility function written in es6:
// safely handles circular referenc...
Neo4j - Cypher vs Gremlin query language
...in, I would do so for a specific query I would find on the net and never come back to again.
You can always learn Cypher really fast (in days) and then continue with the (longer-run) general Gremlin.
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Does Typescript support the ?. operator? (And, what's it called?)
... "accessor variant" of the existential operator).
From CoffeeScript's documentation on Operators:
The accessor variant of the existential operator ?. can be used to soak up null references in a chain of properties. Use it instead of the dot accessor . in cases where the base value may be null o...