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How to check if an object is an array?
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Why does instanceof Array fail if the array is from a different frame?
– NobleUplift
Aug 20 '18 at 21:45
19
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How to remove from a map while iterating it?
How do I remove from a map while iterating it? like:
6 Answers
6
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Copying files from one directory to another in Java
I want to copy files from one directory to another (subdirectory) using Java. I have a directory, dir, with text files. I iterate over the first 20 files in dir, and want to copy them to another directory in the dir directory, which I have created right before the iteration.
In the code, I want to c...
Remove empty strings from a list of strings
I want to remove all empty strings from a list of strings in python.
12 Answers
12
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Using Django time/date widgets in custom form
...get / AdminSplitDateTime (replace 'mydate' etc with the proper field names from your model):
from django import forms
from my_app.models import Product
from django.contrib.admin import widgets
class ProductForm(forms.ModelForm):
class Meta:
model ...
What's the difference between a proc and a lambda in Ruby?
...mbda {} gives you a proc that checks the number of arguments passed to it. From ri Kernel#lambda:
Equivalent to Proc.new, except the resulting Proc objects check the number of parameters passed when called.
An example:
p = Proc.new {|a, b| puts a**2+b**2 } # => #<Proc:0x3c7d28@(irb):1&g...
How to get a random value from dictionary in python
How can I get a random pair from a dict ? I'm making a game where you need to guess a capital of a country and I need questions to appear randomly.
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Random number from a range in a Bash Script
I need to generate a random port number between 2000-65000 from a shell script. The problem is $RANDOM is a 15-bit number, so I'm stuck!
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Django MEDIA_URL and MEDIA_ROOT
...go 2.1 documentation: Serving files uploaded by a user during development
from django.conf import settings
from django.conf.urls.static import static
urlpatterns = patterns('',
# ... the rest of your URLconf goes here ...
) + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
You ...
How to remove first 10 characters from a string?
...starts at a specified character position and taking length no of character from the startIndex.
So for this scenario, you may use the first method like this below:
var str = "hello world!";
str = str.Substring(10);
Here the output is:
d!
If you may apply defensive coding by checking its leng...