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Rails “validates_uniqueness_of” Case Sensitivity
...hard one to solve because what the user will get back is the second (ugly) error and it will make them think their registration failed, when in reality it succeeded. The best way I've found to prevent this is just to use javascript to try to prevent double-submission.
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What is Dispatcher Servlet in Spring?
...ome.html" with no other restrictions in their annotation, that would be an error and it will toss exceptions at you. You can also wire it together with XML if you're oldschool.
– Affe
May 4 '10 at 23:08
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Get Slightly Lighter and Darker Color from UIColor
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I got an error: -getHue:saturation:brightness:alpha: not valid for the NSColor NSCalibratedWhiteColorSpace 0 1; need to first convert colorspace.
– Besi
Jan 29 '16 at 18:09
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Relation between CommonJS, AMD and RequireJS?
...age so horrible... I'm just trying to view the offical spec. It has syntax errors, incomplete documentation and the wiki page isn't resolving.
– taco
Mar 21 '15 at 5:56
7
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Search for “does-not-contain” on a DataFrame in pandas
...ontains also accepts a regular expression...
If the above throws a ValueError, the reason is likely because you have mixed datatypes, so use na=False:
new_df = df[~df["col"].str.contains(word, na=False)]
Or,
new_df = df[df["col"].str.contains(word) == False]
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How to call function from another file in go language?
...a reference to a function in another file within the same package, it will error because you didn't tell Go to run the whole package, you told it to only run that one file.
You can tell go to run as a whole package by grouping the files as a package in the run commaned in several ways. Here are some...
How to get Latitude and Longitude of the mobile device in android?
...d the nedded permissions but longitude and latitude are null..where is the error here?
– Bahaa Salaheldin
Nov 25 '18 at 23:28
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Hash function that produces short hashes?
...tly unique...
I'm no expert, so please correct this if it has any glaring errors (in Python again like the accepted answer):
import base64
import hashlib
import uuid
unique_id = uuid.uuid4()
# unique_id = UUID('8da617a7-0bd6-4cce-ae49-5d31f2a5a35f')
hash = hashlib.sha1(str(unique_id).encode("UTF...
How to convert a Git shallow clone to a full clone?
...hing all the missing commits, but when I try to push new commits, I get an error about the server not knowing about 'shallow' refs
– Tyguy7
Sep 19 '15 at 0:08
3
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What is process.env.PORT in Node.js?
...is your static setting, then your application will result in a 500 gateway error because Amazon is configuring the port for you.
This is a minimal Express application that will deploy on Amazon's Elastic Beanstalk:
var express = require('express');
var app = express();
app.get('/', function (req,...