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Why do you create a View in a database?
...eir own queries (through some interactive SQL program or writing their own scripts), they can run select * from customer which gives them access to everything. If you give them access to the view and not the table, they cannot access fields that aren't in the view.
– Graeme Per...
How to convert Linux cron jobs to “the Amazon way”?
...hen certain CloudWatch stats aren't what they should be. We use cloud-init scripts to get the cronjobs running. Of course, this comes with a downtime, leading to missed cronjobs (when running certain tasks every minute, like we do).
Use the logic that rcron uses. Of course, the magic is not really i...
How to start working with GTest and CMake
...e is correct)
cmake -B build -DCMAKE_TOOLCHAIN_FILE=C:\bin\programs\vcpkg\scripts\buildsystems\vcpkg.cmake
and build using cmake --build build as usual.
Note that, vcpkg will also copy the required gtest(d).dll/gtest(d)_main.dll from the install folder to the Debug/Release folders.
Test with cd b...
Explain the encapsulated anonymous function syntax
...he reasoning behind the syntax for encapsulated anonymous functions in JavaScript? Why does this work: (function(){})(); but this doesn't: function(){}(); ?
...
What is the “-d” in “npm -d install”?
...argument. For example, this issue refers to doing npm -d install coffee-script . There are a few other pages that also refer to this syntax, including the install instructions for at least one npm package.
...
Remove a character from the end of a variable
...
Use target=${1%/}
See this the parameter substitution of this bash scripting guide for more.
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Creating an empty file in Ruby: “touch” equivalent?
... When is "at some point" going to happen? At the end of the script, or immediately because it hasn't been assigned to any variable? I'm creating the file so other processes on the system can start working with it immediately, and they will be blocked if the file handle is still open f...
What is the difference between compile code and executable code?
...
A build could be seen as a script, which comprises of many steps - the primary one of which would be to compile the code.
Others could be
running tests
reporting (e.g. coverage)
static analysis
pre and post-build steps
running custom tools over cert...
Why am I getting a NoClassDefFoundError in Java?
...f one of it dependency like native library may not available.
Any start-up script is overriding Classpath environment variable.
You might be running your program using jar command and class was not defined in manifest file's ClassPath attribute.
Resources:
3 ways to solve NoClassDefFoundError
ja...
Maximum number of records in a MySQL database table
...erent table. You would have this happen weekly or monthly in a maintenance script in the middle of a slow time.
When you run into to many rows in your table then you should start sharding the tables or partitioning and put old data in old tables by year such as users_2011_jan, users_2011_feb or use...