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How to install pip with Python 3?
... manual way, the now-recommended method is to install using the get-pip.py script from pip's installation instructions.
Install pip
To install pip, securely download get-pip.py
Then run the following (which may require administrator access):
python get-pip.py
If setuptools is not already installe...
How to create Gmail filter searching for text only at start of subject line?
... has source showing how it can be done (copy the document, then Tools > Script Editor to get the complete source).
You could also do this via IMAP as described here:
Python IMAP search for partial subject
and script something to move messages to different folder. The IMAP SEARCH verb only sup...
Understanding exactly when a data.table is a reference to (vs a copy of) another data.table
...od does. When wrapped with invisible() or when called within a function or script, the print method isn't called.
All this applies inside functions too; i.e., := and set() do not copy on write, even within functions. If you need to modify a local copy, then call x=copy(x) at the start of the funct...
git: How to ignore all present untracked files?
...hort because manual states "Give the output in an easy-to-parse format for scripts. This is similar to the short output, but will remain stable across git versions and regardless of user configuration." So we have both the parseability and stability;
grep '^??' filters only the lines starting with ?...
How can javascript upload a blob?
... actually don't have to use FormData to send a Blob to the server from JavaScript (and a File is also a Blob).
jQuery example:
var file = $('#fileInput').get(0).files.item(0); // instance of File
$.ajax({
type: 'POST',
url: 'upload.php',
data: file,
contentType: 'application/my-binary-typ...
Do htmlspecialchars and mysql_real_escape_string keep my PHP code safe from injection?
...< or > to do anything dangerous. Our attack vector could just be javascript:alert(document.cookie)
Now resultant HTML looks like
<img src= "javascript:alert(document.cookie)" />
The attack gets straight through.
It gets worse. Why? because htmlspecialchars (when called this way) on...
How to prevent Node.js from exiting while waiting for a callback?
...ventEmitter.emit('myevent', {something: "Bla"})
});
The last thing in my script was the eventEmitter.on:
eventEmitter.on('myevent', function(myResult){
// I needed the result to be written to stdout so that the calling process could get it
process.stdout.write(JSON.stringify(myResult));
});
...
What are “first class” objects?
...wer for more details about classes as objects).
Here is an example of Javascript first class functions:
// f: function that takes a number and returns a number
// deltaX: small positive number
// returns a function that is an approximate derivative of f
function makeDerivative( f, deltaX )
{
v...
What does “&” at the end of a linux command mean?
I am a system administrator and I have been asked to run a linux script to clean the system.
4 Answers
...
How do you copy a record in a SQL table but swap out the unique id of the new row?
... a column and wanted to copy that data too, need to add the column to this script. Best is to generate insert dynamically using sys tables.
– Jeyara
Mar 11 '19 at 23:28
add a ...