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Apache POI Excel - how to configure columns to be expanded?
I am using Apache POI API to generate excel spreadsheet to output some data.
11 Answers
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How do I check if an HTML element is empty using jQuery?
I'm trying to call a function only if an HTML element is empty, using jQuery.
17 Answers
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Can't stop rails server
...n the PID column to kill the process:
For example:
$ kill -9 PID
And some of the other answers i found is:
To stop the rails server while it's running, press:
CTRL-C
CTRL-Z
You will get control back to bash. Then type (without the $):
$ fg
And this will go back into the process, and then ...
Does return stop a loop?
...ops execution and exits the function. return always** exits its function immediately, with no further execution if it's inside a for loop.
It is easily verified for yourself:
function returnMe() {
for (var i = 0; i < 2; i++) {
if (i === 1) return i;
}
}
console.log(returnMe());
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byte[] to file in Java
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Use Apache Commons IO
FileUtils.writeByteArrayToFile(new File("pathname"), myByteArray)
Or, if you insist on making work for yourself...
try (FileOutputStream fos = new FileOutputStream("pathname")) {
fos.write(myByteArray);
//fos.close(); There is no more need for this line since you...
How to add a delay for a 2 or 3 seconds [closed]
....Sleep) ------>
For other scenarios (e.g. starting operations after some time etc.) check Cody's answer.
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Format Float to n decimal places
...so pass the float value, and use:
String.format("%.2f", floatValue);
Documentation
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Android dismiss keyboard
... can use the following lines of code in your button's on click Event
InputMethodManager imm = (InputMethodManager)getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(myEditText.getWindowToken(), 0);
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How to switch activity without animation in Android?
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You can create a style,
<style name="noAnimTheme" parent="android:Theme">
<item name="android:windowAnimationStyle">@null</item>
</style>
and set it as theme for your activity in the manifest:
<activity android:name=".ui.Arti...
Error 1022 - Can't write; duplicate key in table
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The most likely you already have a constraint with the name iduser or idcategory in your database. Just rename the constraints if so.
Constraints must be unique for the entire database, not just for the specific table you are creating/altering.
To find out where the constraints a...