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An “and” operator for an “if” statement in Bash
...al is true if the job's return value is 0 or false otherwise).
For trivial tests, there is the test program (man test).
As some find lines like if test -f filename; then foo bar; fi, etc. annoying, on most systems you find a program called [ which is in fact only a symlink to the test program. When ...
#pragma once vs include guards? [duplicate]
...++ can do the same optimization when guards are detected but it have to be confirmed.
Using the two together you get the best of each compiler for this.
Now, if you don't have some automatic script to generate the guards, it might be more convenient to just use #pragma once. Just know what that m...
Python constructors and __init__
...nce of C after it is created.
For example Python allows you to do:
class Test(object):
pass
t = Test()
t.x = 10 # here you're building your object t
print t.x
But if you want every instance of Test to have an attribute x equal to 10, you can put that code inside __init__:
class Test(obj...
Blurry text after using CSS transform: scale(); in Chrome
...
Confirmed in Chrome 79
– Fareesh Vijayarangam
Jan 13 at 11:54
1
...
Perl build, unit testing, code coverage: A complete working example
...ow answers that I have found in regards to the Perl build process and unit testing and code coverage simply point me to CPAN for the documentation there. There's absolutely nothing wrong with pointing to CPAN modules because that's where the full documentation is supposed to reside. I've had troub...
Rails and PostgreSQL: Role postgres does not exist
...nd make sure you are hitting the pg db that you want. Use rails console to confirm.
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What's the difference between jQuery's replaceWith() and html()?
...two ways of using html() and replaceWith() Jquery functions.
<div id="test_id">
<p>My Content</p>
</div>
1.) html() vs replaceWith()
var html = $('#test_id p').html(); will return the "My Content"
But the
var replaceWith = $('#test_id p').replaceWith(); will return ...
SSL is not enabled on the server
... without SSL encryption, like that:
db, err := sql.Open("postgres", "user=test password=test dbname=test sslmode=disable")
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TypeError: module.__init__() takes at most 2 arguments (3 given)
...================================
___________________ ERROR collecting tests/test_geojson.py ____________________
test_geojson.py:2: in (module)
from pyexample.responses import GeoJsonResponse ..\pyexample\responses \GeoJsonResponse.py:12: in (module)
class GeoJsonResponse(Respo...
git diff renamed file
...4
--- a/a.txt
+++ b/a.txt
@@ -1 +1 @@
-hello
+goodbye
diff --git a/a.txt b/test/a.txt
similarity index 100%
copy from a.txt
copy to test/a.txt
Incidentally, if you restrict your diff to just one path (as you do in git diff HEAD^^ HEAD a.txt you aren't ever going to see the renames or copies becaus...