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Can grep show only words that match search pattern?
...es, whereas with -h it just displayed the matched words without any specification about which file it is. So, to match the original question, I think it is necessary in certain circumstances.
– LokMac
Nov 15 '17 at 1:41
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How to implement “confirmation” dialog in Jquery UI dialog?
...vent handler for the confirmation button click. I used a CSS class to indicate which links should have the confirmation behavior.
Here's my solution, abstracted away to be suitable for an example.
<div id="dialog" title="Confirmation Required">
Are you sure about this?
</div>
&...
Merge PDF files
...t ImportError:
from pyPdf import PdfFileReader, PdfFileWriter
def pdf_cat(input_files, output_stream):
input_streams = []
try:
# First open all the files, then produce the output file, and
# finally close the input files. This is necessary because
# the data isn'...
How do you install ssh-copy-id on a Mac?
...stalled with brew on old PCs due to compiling dependencies errors at ssl.
cat ~/.ssh/id_rsa.pub | ssh user@123.45.56.78 "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys"
credit goes to this site
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Insert a commit before the root commit in Git?
...--parent-filter 'sed "s/^\$/-p <sha of newroot>/"' --tag-name-filter cat master
Note that the '--tag-name-filter cat' options means that tags will be rewritten to point to the newly created commits.
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Command line CSV viewer? [closed]
... following example demonstrates how to use sed to insert a placeholder:
$ cat data.csv
1,2,3,4,5
1,,,,5
$ sed 's/,,/, ,/g;s/,,/, ,/g' data.csv | column -s, -t
1 2 3 4 5
1 5
$ cat data.csv
1,2,3,4,5
1,,,,5
$ column -s, -t < data.csv
1 2 3 4 5
1 5
$ sed 's/,,/, ,/g;s/,,/, ,/g' d...
What is a CSRF token ? What is its importance and how does it work?
I am writing an application (Django, it so happens) and I just want an idea of what actually a "CSRF token" is and how it protects the data. Is the post data not safe if you do not use CSRF tokens?
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Why use ICollection and not IEnumerable or List on many-many/one-many relationships?
...ch, the IEnumerable<T>.GetEnumerator() method will return a heap-allocated object, rendering the optimization impossible.
– supercat
May 10 '12 at 15:58
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How to debug a bash script? [closed]
.....]
These give you a trace of what is being executed. (See also 'Clarification' near the bottom of the answer.)
Sometimes, you need to control the debugging within the script. In that case, as Cheeto reminded me, you can use:
set -x
This turns debugging on. You can then turn it off again wi...
Is there a way to check if int is legal enum in C#?
...ge:
using System;
[Flags] public enum PetType
{
None = 0, Dog = 1, Cat = 2, Rodent = 4, Bird = 8, Reptile = 16, Other = 32
};
public class Example
{
public static void Main()
{
object value;
// Call IsDefined with underlying integral value of member.
value = 1;
...