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How do I add a placeholder on a CharField in Django?
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For a ModelForm, you can use the Meta class thus:
from django import forms
from .models import MyModel
class MyModelForm(forms.ModelForm):
class Meta:
model = MyModel
widgets = {
'name': forms.TextInput(attrs={'placeholder': 'Name'}),
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Why use Dijkstra's Algorithm if Breadth First Search (BFS) can do the same thing faster?
Both can be used to find the shortest path from single source. BFS runs in O(E+V) , while Dijkstra's runs in O((V+E)*log(V)) .
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Html code as IFRAME source rather than a URL
...st html code? so my problem is simple, I have a page it loads an HTML body from MYSQL I want to present that code in a frame so it renders it self independent of the rest of the page and in the confines of that specific bordering.
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Include constant in string without concatenating
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No.
With Strings, there is no way for PHP to tell string data apart from constant identifiers. This goes for any of the string formats in PHP, including heredoc.
constant() is an alternative way to get hold of a constant, but a function call can't be put into a string without concatenation e...
Breaking loop when “warnings()” appear in R
...ely, R will also report to you that these particular errors were converted from warnings.
j <- function() {
for (i in 1:3) {
cat(i, "\n")
as.numeric(c("1", "NA"))
}}
# warn = 0 (default) -- warnings as warnings!
j()
# 1
# 2
# 3
# Warning messages:
# 1: NAs introduced by c...
Random alpha-numeric string in JavaScript? [duplicate]
...ch. I tried using it, and it seems to have some problems. As you can see from THIS screenshot, it sometimes generates strings that aren't the specified length. I put your randomString(..) function in a for(var i=0;i<50;i++){} loop that generated 50 random strings, and the last one is three cha...
Is assert evil? [closed]
...s different example of when you might use an assertion:
build-sorted-list-from-user-input(input)
throw-exception-if-bad-input(input)
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//build list using algorithm that you expect to give a sorted list
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assert(is-sorted(list))
end
You use an exception for the input ...
'heroku' does not appear to be a git repository
..., notice that git push heroku master will fail if you are trying to deploy from a subdirectory. The deploy with heroku must be done from root directory with a valid package.json and .git folder, as told here stackoverflow.com/questions/38658038/…
– Junior Mayhé
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Ignoring an already checked-in directory's contents?
...out sub-directories. Now I just created a script to copy these assets over from another, structured directory, with several levels of sub-directories.
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Cannot install node modules that require compilation on Windows 7 x64/VS2012
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updated answer to include the new readme from node-gyp, thanks @MichaelK.
– catalint
Dec 21 '15 at 14:18
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