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Reference list item by index within Django template?
...//docs.djangoproject.com/en/dev/howto/custom-template-tags/
such as get my_list[x] in templates:
in template
{% load index %}
{{ my_list|index:x }}
templatetags/index.py
from django import template
register = template.Library()
@register.filter
def index(indexable, i):
return indexable[i]...
Getting “bytes.Buffer does not implement io.Writer” error message
...main
import "bytes"
import "io"
func main() {
var b bytes.Buffer
_ = io.Writer(&b)
}
You don't need use "bufio.NewWriter(&b)" to create an io.Writer. &b is an io.Writer itself.
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How do I debug error ECONNRESET in Node.js?
...ity wiki
2 revs, 2 users 67%Suzana_K
4
...
How to do a LIKE query in Arel and Rails?
...
This is how you perform a like query in arel:
users = User.arel_table
User.where(users[:name].matches("%#{user_name}%"))
PS:
users = User.arel_table
query_string = "%#{params[query]}%"
param_matches_string = ->(param){
users[param].matches(query_string)
}
User.where(param_mat...
How to do a batch insert in MySQL
... within
parentheses and separated by commas.
Example:
INSERT INTO tbl_name (a,b,c) VALUES(1,2,3),(4,5,6),(7,8,9);
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SQL selecting rows by most recent date
...ecent date".
Modified from http://wiki.lessthandot.com/index.php/Returning_The_Maximum_Value_For_A_Row
SELECT t.chargeId, t.chargeType, t.serviceMonth FROM(
SELECT chargeId,MAX(serviceMonth) AS serviceMonth
FROM invoice
GROUP BY chargeId) x
JOIN invoice t ON x.chargeId =t.chargeI...
Get position of UIView in respect to its superview's superview
...s you are interested in, you could do this:
static func getConvertedPoint(_ targetView: UIView, baseView: UIView)->CGPoint{
var pnt = targetView.frame.origin
if nil == targetView.superview{
return pnt
}
var superView = targetView.superview
while superView != baseView{...
Equation for testing if a point is inside a circle
If you have a circle with center (center_x, center_y) and radius radius , how do you test if a given point with coordinates (x, y) is inside the circle?
...
How to undo the effect of “set -e” which makes bash exit immediately if any command fails?
...very last lines of corresponding manual page (faqs.org/docs/bashman/bashref_56.html) which I didn't read to the end.
– Tianyi Cui
Aug 18 '10 at 22:22
...
How do Google+ +1 widgets break out of their iframe?
...pect that element then you'll get an iframe src for plusone.google.com/u/0/_/+/fastbutton?url=... This iframe contains the CSRF token for submitting to google+.
– rook
Sep 6 '11 at 0:50
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