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What's the best way of structuring data on firebase?
...No biggie if none of those things number in thousands. But a big deal for 10k users with upwards of 5k messages each.
So now the optimal strategy for a hierarchical, real-time structure becomes more obvious:
/user_meta/uid/email
/messages/uid/...
/widgets/uid/...
An additional tool which is extr...
Difference between del, remove and pop on lists
... removes the first matching value, not a specific index:
>>> a = [0, 2, 3, 2]
>>> a.remove(2)
>>> a
[0, 3, 2]
del removes the item at a specific index:
>>> a = [9, 8, 7, 6]
>>> del a[1]
>>> a
[9, 7, 6]
and pop removes the item at a specific ind...
Difference between Observer, Pub/Sub, and Data Binding
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+50
Here's my take on the three:
Data Binding
Essentially, at the core this just means "the value of property X on object Y is semantica...
Inner text shadow with CSS
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105
Here's a little trick I discovered using the :before and :after pseudo-elements:
.depth {
...
Node.js get file extension
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edited Apr 26 '13 at 7:10
Tim Santeford
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answ...
Include .so library in apk in android studio [duplicate]
...om/khernyo/4226923#comment-812526
It says:
for gradle android plugin v0.3 use "com.android.build.gradle.tasks.PackageApplication"
That should fix your problem.
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Test if remote TCP port is open from a shell script
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460
As pointed by B. Rhodes, nc (netcat) will do the job. A more compact way to use it:
nc -z <ho...
diff to output only the file names
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answered Jun 2 '11 at 17:06
John KugelmanJohn Kugelman
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What is a tracking branch?
... |
edited May 8 at 19:50
community wiki
6 re...
Confusion: @NotNull vs. @Column(nullable = false) with JPA and Hibernate
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330
@NotNull is a JSR 303 Bean Validation annotation. It has nothing to do with database constraints...