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Convert UTC to local time in Rails 3
...mes. See them with:
rake time:zones:us
You can also run rake time:zones:all for all time zones.
To see more zone-related rake tasks: rake -D time
So, to convert to EST, catering for DST automatically:
Time.now.in_time_zone("Eastern Time (US & Canada)")
...
Ignoring time zones altogether in Rails and PostgreSQL
...time zone.
timestamptz is the preferred type in the date/time family, literally. It has typispreferred set in pg_type, which can be relevant:
Generating time series between two dates in PostgreSQL
Internal storage and epoch
Internally, timestamps occupy 8 bytes of storage on disk and in RAM. It is...
How to replace multiple substrings of a string?
...t overengineered? because this way we do it in one pass (=fast), and we do all the replacements at the same time, avoiding clashes like "spamham sha".replace("spam", "eggs").replace("sha","md5") being "eggmd5m md5" instead of "eggsham md5"
– flying sheep
Sep 4 ...
The purpose of Model View Projection Matrix
...d space to camera space, projection from camera to screen.
If you compose all three, you can use the one result to map all the way from object space to screen space, making you able to work out what you need to pass on to the next stage of a programmable pipeline from the incoming vertex positions....
What is the difference between the $parse, $interpolate and $compile services?
...ence between $parse , $interpolate and $compile services?
For me they all do the same thing: take template and compile it to template-function.
...
What does “Memory allocated at compile time” really mean?
... languages like C and C++, people often refer to static and dynamic memory allocation. I understand the concept but the phrase "All memory was allocated (reserved) during compile time" always confuses me.
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Reverse Range in Swift
...o:0,by:-1) { print(i) } // 5 4 3 2 1
Update For latest Swift 2
First of all, protocol extensions change how reverse is used:
for i in (1...5).reverse() { print(i) } // 5 4 3 2 1
Stride has been reworked in Xcode 7 Beta 6. The new usage is:
for i in 0.stride(to: -8, by: -2) { print(i) } // 0 -2...
What's the strangest corner case you've seen in C# or .NET? [closed]
...es and brain teasers and would always like to hear more. The page only really covers C# language bits and bobs, but I also find core .NET things interesting too. For example, here's one which isn't on the page, but which I find incredible:
...
Difference between make and build in Android Studio
...ed. Others are seldom used.
It is the same as IntelliJ Idea.
Compile All the source files in the specified scope are compiled. The scope in this case may be a file, a package, etc.
Make Project All the source files in the entire project that have been modified since the last compilation a...
Grant **all** privileges on database
...
GRANT ALL PRIVILEGES ON mydb.* TO 'myuser'@'%' WITH GRANT OPTION;
This is how I create my "Super User" privileges (although I would normally specify a host).
IMPORTANT NOTE
While this answer can solve the problem of access, WITH G...