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How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throw
...gure and troubleshoot <p:fileUpload> depends on PrimeFaces version.
All PrimeFaces versions
The below requirements apply to all PrimeFaces versions:
The enctype attribute of the <h:form> needs to be set to multipart/form-data. When this is absent, the ajax upload may just work, but t...
How to save an activity state using save instance state?
..."MyString", "Welcome back to Android");
// etc.
}
The Bundle is essentially a way of storing a NVP ("Name-Value Pair") map, and it will get passed in to onCreate() and also onRestoreInstanceState() where you would then extract the values from activity like this:
@Override
public void onRestoreI...
Sending message through WhatsApp
...en/android/26000030/?category=5245251
WhatsApp's Click to Chat feature allows you to begin a chat with
someone without having their phone number saved in your phone's
address book. As long as you know this person’s phone number, you can
create a link that will allow you to start a chat w...
Keyboard shortcut to change font size in Eclipse?
...d Fonts preference page, the commands persistently change the font size in all editors of the same type. If the editor type's font is configured to use a default font, then that default font will be zoomed.
So, the font size change is not limited to the current file and the new value of the font s...
What actually causes a Stack Overflow error? [duplicate]
...ve programs, when there is a risk of writing into memory that had not been allocated for the buffer, and thus to corrupt some other memory locations. It's not the case at all.
JVM has a given memory allocated for each stack of each thread, and if an attempt to call a method happens to fill this mem...
How to convert JSON to CSV format and store in a variable
... Worth noting that this escapes strings in quotes using \" which allows some fields to "pop out" of their column when viewed in Excel (which seems to prefer "" as an escape character for quotes). This can be solved by adding .replace(/\\"/g, '""') to the end of JSON.stringify(row[fieldName...
Git Extensions: Win32 error 487: Couldn't reserve space for cygwin's heap, Win32 error 0
...wer below (stackoverflow.com/a/31970708/88409) explains what the problem really is, and it has nothing to do with corrupted memory.
– Triynko
Feb 13 '17 at 15:48
...
Get the index of the object inside an array, matching a condition
...lorer, there's a polyfill on the linked page.
Performance note
Function calls are expensive, therefore with really big arrays a simple loop will perform much better than findIndex:
let test = [];
for (let i = 0; i < 1e6; i++)
test.push({prop: i});
let search = test.length - 1;...
How to sort an array in descending order in Ruby
... 0.001631 0.110628 ( 0.111532)
...the reverse method doesn't actually return a reversed array - it returns an enumerator that just starts at the end and works backwards.
The source for Array#reverse is:
static VALUE
rb_ary_reverse_m(VALUE ary)
{
long len = RARRAY_LEN(...
How do I get a TextBox to only accept numeric input in WPF?
...nly want to allow numbers, dots and dashes.
private static readonly Regex _regex = new Regex("[^0-9.-]+"); //regex that matches disallowed text
private static bool IsTextAllowed(string text)
{
return !_regex.IsMatch(text);
}
If you want to prevent pasting of incorrect data hook up the DataObj...