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Add column with constant value to pandas dataframe [duplicate]
...le times.
# Wrong
df['new'] = [[]] * len(df)
# Right
df['new'] = [[] for _ in range(len(df))]
Generating a copy: df.assign(new=0)
If you need a copy instead, use DataFrame.assign:
df.assign(new='y')
A B C new
0 x x x y
1 x x x y
2 x x x y
3 x x x y
And, if you ne...
How does the const constructor actually work?
...a nice performance win for Flutter widgets according to medium.com/@mehmetf_71205/inheriting-widgets-b7ac56dbbeb1 "Use const to build your widgets Without const, selective rebuilding of the sub-tree does not happen. Flutter creates a new instance of each widget in the sub-tree and calls build() was...
Preserve Line Breaks From TextArea When Writing To MySQL
...
Here is what I use
$textToStore = nl2br(htmlentities($inputText, ENT_QUOTES, 'UTF-8'));
$inputText is the text provided by either the form or textarea.
$textToStore is the returned text from nl2br and htmlentities, to be stored in your database.
ENT_QUOTES will convert both double and singl...
passport.js passport.initialize() middleware not in use
... match this exactly.
var app = express();
app.use(require('serve-static')(__dirname + '/../../public'));
app.use(require('cookie-parser')());
app.use(require('body-parser').urlencoded({ extended: true }));
app.use(require('express-session')({
secret: 'keyboard cat',
resave: true,
saveUninitia...
Find substring in the string in TWIG
...reat :) I used it to figure out the current route: <li class="{% if 'gew_team_default_' in app.request.get('_route') %}active{% endif %}">
– Tobias Oberrauch
Aug 28 '14 at 14:11
...
Convert integer to string Jinja
... my case I've got integers as strings coming from JSON content files: "hero_title_img_w": "111" and "hero_title_img2_w": "222". Then I'm adding them in .NJK file: {{ hero_title_img_w|int + hero_title_img2_w|int }} to use as image's width attribute. Hope it helps somebody one day.
...
Replace line break characters with in ASP.NET MVC Razor view
... StringSplitOptions.None);
foreach(string line in lines)
{
_ = htmlContent.Append(line);
_ = htmlContent.AppendHtml(br);
}
return htmlContent;
}
share
|
improve thi...
How do I check if a file exists in Java?
...m there is an issue with stale file handles: bugs.java.com/bugdatabase/view_bug.do?bug_id=5003595 It's kind of obscure, but has been the cause of some frustrating bugs in production code before.
– CAW
Mar 17 '17 at 22:17
...
How to change background color in android app
... but isn't it easier just to use the hex value?
– the_prole
Jun 21 '14 at 9:31
it would be very easy, but bad practice...
Limit results in jQuery UI Autocomplete
...thank you so much for this! :D so happy I happend to find this solution ^__^
– Alisso
Jan 12 '13 at 5:00
what if one...