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Which is the preferred way to concatenate a string in Python?
...compared to extending a string. And this can be true, in some cases. Here, for example, is one
million appends of a one-character string, first to a string, then to a list:
a += b:
0.10780501365661621
a.append(b):
0.1123361587524414
OK, turns out that even when the resulting string is a million c...
CSS: Change image src on img:hover
...ehaviour. Sometimes it's important to have image element on the page, e.g. for accessibility requirements, but then it's better to show/hide two image elements with css. In most cases it's a bad idea to change image's src attribute with JS, try to use background-image if you can.
...
How do I pass command line arguments to a Node.js program?
...ny additional command line arguments.
// print process.argv
process.argv.forEach(function (val, index, array) {
console.log(index + ': ' + val);
});
This will generate:
$ node process-2.js one two=three four
0: node
1: /Users/mjr/work/node/process-2.js
2: one
3: two=three
4: four
...
StringIO in Python3
... are gone. Instead, import the io
module and use io.StringIO or io.BytesIO for text and data
respectively.
.
A possibly useful method of fixing some Python 2 code to also work in Python 3 (caveat emptor):
try:
from StringIO import StringIO ## for Python 2
except ImportError:
from io import...
How to change variables value while debugging with LLDB in Xcode?
...[-u ] -- expression [-o] [-d
] [-u ] -- expression
-G <gdb-format> ( --gdb-format <gdb-format> )
Specify a format using a GDB format specifier string.
-d <boolean> ( --dynamic-value <boolean> )
Upcast the value resulting from the expression ...
Where to find extensions installed folder for Google Chrome on Mac?
...re defined at http://www.chromium.org/user-experience/user-data-directory. For Chrome on Mac, it's
~/Library/Application\ Support/Google/Chrome/Default
The actual location can be different, by setting the --user-data-dir=path/to/directory flag.
If only one user is registered in Chrome, look in th...
How to install Hibernate Tools in Eclipse?
...ware Updates... -> Add Site...):
The latest stable release update site for JBoss Tools
There you can find Hibernate tools together with other handy JBoss plugins.
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Merging objects (associative arrays)
...tive arrays in JavaScript? Does everyone just do it by rolling their own for loop?
16 Answers
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How to convert an address into a Google Maps Link (NOT MAP)
After looking (Googling) on the web for a while, I can find nothing that takes an address like:
14 Answers
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Postgres - FATAL: database files are incompatible with server
...
Worked on 9.5 to 11 as well. Kudos for also showing how to use brew info.
– yacc
Jul 8 '19 at 9:20
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