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What is the difference between .map, .every, and .forEach?
I've always wondered what the difference between them were. They all seem to do the same thing...
4 Answers
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Exclude a sub-directory using find
...terating into the directory structure and using cpu cycles to iterate over all those directories/files. to prevent find from iterating over those directories/files (maybe there are millions of files there) then you need to use -prune (the -prune option is difficult to use however).
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Get file version in PowerShell
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Since PowerShell can call .NET classes, you could do the following:
[System.Diagnostics.FileVersionInfo]::GetVersionInfo("somefilepath").FileVersion
Or as noted here on a list of files:
get-childitem * -include *.dll,*.exe | foreach-object { "...
Count occurrences of a char in plain text file
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If all you need to do is count the number of lines containing your character, this will work:
grep -c 'f' myfile
However, it counts multiple occurrences of 'f' on the same line as a single match.
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Why Collections.sort uses merge sort instead of quicksort?
...to provide a stable sort (Merge Sort)
to sort object references. (Techincally speaking, multiple sequential
stable sorts result in a lexicographic ordering on the keys in the
reverse order of the sorts: the final sort determines the most
significant subkey.)
It's a nice side benefit tha...
Difference between Document-based and Key/Value-based databases?
...e debate on the correct name for databases such as Cassandra, I'd like to call them column-family stores. Although key-value pairs are an essential part of Cassandra, it's not limited to just that. It allows you to nest key-value pairs, so a key could refer to multiple sub-key-value pairs.
You cann...
How to create a DialogFragment without title?
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Dialog fragment has setStyle method, which should be called before view creation Java Doc. Also style of the dialog can be set with the same method
public static MyDialogFragment newInstance() {
MyDialogFragment mDialogFragment = new MyDialogFragment();
//Set Ar...
Android EditText delete(backspace) key event
... common mistake we are checking KeyEvent.KEYCODE_BACK for backspace, but really it is KeyEvent.KEYCODE_DEL (Really that name is very confusing! )
editText.setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(View v, int keyCode, KeyEvent event) {
//...
Setting a WebRequest's body data
... throw new ApplicationException(string.Format(
"Remote server call {0} {1} resulted in a http error {2} {3}.",
method,
uri,
httpResponse.StatusCode,
httpResponse.StatusDescription), wex);
}
else
{
throw new ApplicationEx...
No module named setuptools
I want to install setup file of twilio. When I install it through given command it is given me an error:
5 Answers
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