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I'm getting a NoSuchMethodError error when running my Java program. What's wrong and how do I fix it?

I am getting a NoClassDefFoundError when I run my Java application. What is typically the cause of this?

Is it possible to call a constructor from another (within the same class, not from a subclass)? If yes how? …

How can I find the number of cores available to my application from within Java code?

How do I remove an element from a list by index in Python?

I found the list.remove method, but say …

I have this program that calculates the time taken to answer a specific question, and quits out of the while …

>>> a=[1,2,3]
>>> a.remove(2)
>>> a
[1, 3]
>>> a=[1,2,3]
>>> del a[1]
>>> a
[1, 3]
>>> a= [1,2,3] …

What's the difference between the list methods append() and extend()?

I  am using Django (version 3.1) and have forgotten both admin username and password. How to reset both?

And is it …

Is it possible to temporarily disable constraints in MySQL?

I have two Django models, each with a foreign key to …

I  would like to know what are all the possible values for the timezone argument in the Python library pytz. How …

A model change from

standard = models.ManyToManyField(Standard)

to

standard = models.ManyToManyField(Standard, blank=True, null=True)

South schemamigration for this app doesn't recognize …

using the Django REST Framework 2.0.

Here is my model class:

class Mission(models.Model):
  assigned_to = models.ForeignKey('auth.User',
                                   related_name='missions_assigned',
                                   blank = True) …

I have an array that is initialized like:

Element[] array = {new Element(1), new Element(2), new Element(3)};

I would like …

i += j;

Was just a shortcut for:

i = i + j;

But if we try this:

int i …

I use object != null a lot to avoid NullPointerException.

Is there a good alternative to this?

For example …

If you have a java.io.InputStream object, how should you process that object and produce a String?

Suppose I have …

I am trying to add CSS styling to my html email to be sent so I used `django-inlinecss 0.3.0` 

In …

Hi ,

I want to build the multi choice form in Django template . I mean user should able to …

Hello everyone hope you all doing well.

I need little guidance/help

I want to get all slots between the start …

Hi guys ,

       I face a lot of confusion between margin and padding whem I am trying …

Could you please tell me a way in python to open a file for both reading and writing......

Thanks in …

How do I declare and initialize an array in Java?

Hi,

Is there a video tutorial that is available to follow and do web notifications. I want people who are …

Hi

Could you please provide some examples, script with details level steps ?

My requirement is, I am building an …

For example:

I have a list of tuples like:

data = [(1,2,3), (4,3,6), (7,0,9)]

I want the output as:

[(7, …

I have a file and I want to add some lines to the file without overriding the lines that are …

How to Create a Database SQLite , if anyone help , 

What is the difference between these template tags truncate_words, truncatewords_html and truncatechars_html?

What is the key difference beween these CSS properties and when to use them?
Thanks in advance!

Is there a way to push the footer to the bottom of the page? I don't want to make the …

I've got a nested loop construct like this:

for (Type type : types) {
    for (Type t : types2) { …

In java,

    I want to delay the execution of thread for 5 sec 

   Is it possible to …

Suggest me a way to take list of numbers as input 

Help from anyone will make me solve it more …

Hi Guys,

Please share detail level steps to push the django code from local to Heroku server?

As  I am …

could any one explain clearly with examples

If I have a table with two columns, how do I specify any other css so that it is applied …

I have a list of tuples like

data = [(1,2,3),('soni','ansh','shivika'),('female','male','female')]

Now I want to extract the 2nd element from the …

What is the correct way to write the statement if ($a contains 'are') for below code ??

$a = 'How …

Hello! need to ask that, do you guys helps in odoo framework too?

I had created a module in odoo …

looking for a string.contains or string.indexof method in Python.

want to do:

if not somestring.contains("blah"):
   continue

I have two Python dictionaries, and I want to write a single expression that returns these two dictionaries, merged (i.e. …

problem with deleting empty directories. Here is the code:

for dirpath, dirnames, filenames in os.walk(dir_to_search):
    //other codes

    try:
        os.rmdir(dirpath)
    except …

I am getting an 'access is denied' error when I attempt to delete a folder that is not empty. I …

For example, if passed the following:

a = []

How do I check to see if a is empty?

Trying to build a shared library using a C extension file but first I have to generate the output file …

Using the following filters in Postman to make a POST request in a Web API but I am unable to …

Tried to run command:

from django.urls import path

Getting error:

Traceback (most recent call last): File "< stdin >", line …

Model class django.contrib.contenttypes.models.ContentType doesn't declare an explicit app_label 

 Any advice would be tremendously appreciated.

I'm using Python 3.4 and Django …