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How to remove the lines which appear on file B from another file A?
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207
If the files are sorted (they are in your example):
comm -23 file1 file2
-23 suppresses the ...
Check if bash variable equals 0 [duplicate]
I have a bash variable depth and I would like to test if it equals 0. In case yes, I want to stop executing of script. So far I have:
...
How efficient can Meteor be while sharing a huge collection among many clients?
...eries recalculate on update.) The
driver also polls each live query on a 10 second timer to catch
out-of-band database updates that bypassed the Meteor server.
The merge box
The job of the merge box is to combine the results (added, changed and removed
calls) of all of a client's active publish f...
add column to mysql table if it does not exist
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Note that INFORMATION_SCHEMA isn't supported in MySQL prior to 5.0. Nor are stored procedures supported prior to 5.0, so if you need to support MySQL 4.1, this solution isn't good.
One solution used by frameworks that use database migrations is to record in your database a revision numbe...
What encoding/code page is cmd.exe using?
...e start of each file for
a UTF-16LE Byte Order Mark
(BOM), i.e. the bytes 0xFF 0xFE.
If it finds such a
mark, it displays the Unicode characters in the file using WriteConsoleW
regardless of the current codepage. But when typeing any file without a
UTF-16LE BOM, or for using non-ASCII characters wi...
Check if a given Type is an Enum
... Ry-♦Ry-
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How are cookies passed in the HTTP protocol?
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302
The server sends the following in its response header to set a cookie field.
Set-Cookie:name=v...
How to print binary tree diagram?
...l - level;
int endgeLines = (int) Math.pow(2, (Math.max(floor - 1, 0)));
int firstSpaces = (int) Math.pow(2, (floor)) - 1;
int betweenSpaces = (int) Math.pow(2, (floor + 1)) - 1;
BTreePrinter.printWhitespaces(firstSpaces);
List<Node<T>> newNodes ...
How to convert std::string to LPCSTR?
...LPCSTR (Long Pointer to Constant STRing) -- means that it's a pointer to a 0 terminated string of characters. W means wide string (composed of wchar_t instead of char).
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jQuery Plugin: Adding Callback functionality
... var options = $.extend({
callback: function() {}
}, arguments[0] || {});
// call the callback and apply the scope:
options.callback.call(this);
};
Use it like this:
$('.elem').myPlugin({
callback: function() {
// some action
}
});
...