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How can you determine how much disk space a particular MySQL table is taking up?
...our control panel by clicking on the database name in the left frame
and reading the size for the tables in there in the right frame.
The below query will as well help to get the same information in bytes
select SUM(data_length) + SUM(index_length) as total_size
from information_schema.tables ...
Identify duplicates in a List
...
The method add of Set returns a boolean whether a value already exists (true if it does not exist, false if it already exists, see Set documentation).
So just iterate through all the values:
public Set<Integer> findDuplicates(List<Integer> listContainingDuplicates)
{
...
How do I make a JAR from a .java file?
...manifest, like so:
jar -cvfm myJar.jar myManifest.txt myApp.class
Which reads: "create verbose jarFilename manifestFilename", followed by the files you want to include. Verbose means print messages about what it's doing.
Note that the name of the manifest file you supply can be anything, as jar ...
Automatically import modules when entering the python or ipython interpreter
...THONSTARTUP. From the official documentation:
If this is the name of a readable file, the Python commands in that
file are executed before the first prompt is displayed in interactive
mode. The file is executed in the same namespace where interactive
commands are executed so that objects d...
Passing multiple variables in @RequestBody to a Spring MVC controller using Ajax
... String body = getRequestBody(webRequest);
String val = JsonPath.read(body, parameter.getMethodAnnotation(JsonArg.class).value());
return val;
}
private String getRequestBody(NativeWebRequest webRequest){
HttpServletRequest servletRequest = webRequest.getNativeRequ...
how to remove shared preference while application uninstall in android
...ion ...
android:allowBackup="false">
...
</application>
Read this: http://developer.android.com/guide/topics/data/backup.html
You will also see that if you run Lint under Android > Lint > Security:
It's good to mention here that the process of backup is like a blackbox ....
Make function wait until element exists
...n es6 modules and using Promises.
es6, modules and promises:
// onElementReady.js
const onElementReady = $element => (
new Promise((resolve) => {
const waitForElement = () => {
if ($element) {
resolve($element);
} else {
window.requestAnimationFrame(waitF...
Installing libv8 gem on OS X 10.9+
...mfile (or) a bundle update should suffice. Hope this helps.
From the libv8 README
Bring your own V8
Because libv8 is the interface for the V8 engine used by therubyracer, you may need to use libv8, even if you have V8 installed already. If you wish to use your own V8 installation, rather than have i...
cleanest way to skip a foreach if array is empty [duplicate]
...remove any lines, but the code is much more self documenting and easier to read.
– Peter Ajtai
Aug 10 '10 at 7:29
5
...
Exit Shell Script Based on Process Exit Code
...d was interrupted by a SIGPIPE signal when
head -1 terminated after having read one line.
To know the exit status of the elements of a pipeline
cmd1 | cmd2 | cmd3
a. with zsh:
The exit codes are provided in the pipestatus special array.
cmd1 exit code is in $pipestatus[1], cmd3 exit code in
...