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Error when trying to obtain a certificate: The specified item could not be found in the keychain
I was having a problem with codesigning my apps, so I deleted all the keys from the keychain. Then I went to Certificate Assistant => Request a certificate from a Certificate Authority (to create CSR for a new certificate).
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Print all but the first three columns
...lt;=NF;i++)$(i-(n-1))=$i;NF=NF-(n-1);print $0}' n=4 | tr ' ' '-'
4-5-6-7
All other answers before Sep-2013 are nice but add extra spaces:
Example of answer adding extra leading spaces:
$ echo '1 2 3 4 5 6 7' |
awk '{$1=$2=$3=""}1' |
tr ' ' '-'
---4-5-6-7
Example of answer adding extra t...
How to remove the lines which appear on file B from another file A?
...contents in file1 not in file2, to file3. And then mv file3 file1 would finally clear redundant contents in file1.
– Spectral
Jul 17 '14 at 20:48
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How to skip “are you sure Y/N” when deleting files in batch files
I can't for the life of me remember how to bypass the annoying prompt are you sure? Y/N when deleting files.
4 Answers
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pandas: filter rows of DataFrame with operator chaining
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That is a really nice solution - I wasn't even aware that you could jury-rig methods like that in python. A function like this would be really nice to have in Pandas itself.
– naught101
Mar 3 '17 at...
How can I get the full/absolute URL (with domain) in Django?
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I believe my question specifically said "without the Sites module". Does this hit the DB?
– mpen
Jan 11 '12 at 19:41
1
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django models selecting single field
I have a table/models called Employees and I would like to get all rows of a single field as a queryset.
5 Answers
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How can I get the corresponding table header (th) from a table cell (td)?
...$(function($) {
"use strict";
// Only part of the demo, the thFromTd call does the work
$(document).on('mouseover mouseout', 'td', function(event) {
var td = $(event.target).closest('td'),
th = thFromTd(td);
th.parent().find('.highlight').removeClass('highlight');
if (even...
Builder Pattern in Effective Java
...shua Bloch. I found the idea of the Builder pattern [Item 2 in the book] really interesting. I tried to implement it in my project but there were compilation errors. Following is in essence what I was trying to do:
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Building big, immutable objects without using constructors having long parameter lists
...of course completely wrong.
The trick is that only the build() method actually creates a Foo (hence you Foo can be immutable).
FooFactory.create(), whereXXX(..) and withXXX(..) all create "something else".
That something else may be a FooFactory, here's one way to do it....
You FooFactory would ...