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In Django, how do I check if a user is in a certain group?
...User.
from django.contrib.auth.models import User, Group
group = Group(name = "Editor")
group.save() # save this new group for this example
user = User.objects.get(pk = 1) # assuming, there is one initial user
user.groups.add(group) # user is now in the "Editor" group
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When is the @JsonProperty property used and what is it used for?
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Here's a good example. I use it to rename the variable because the JSON is coming from a .Net environment where properties start with an upper-case letter.
public class Parameter {
@JsonProperty("Name")
public String name;
@JsonProperty("Value")
public St...
Convert PEM to PPK file format
...ay to convert PEM files to PPK files? (you may guess that Amazon EC2 gives me a PEM file, and I need to use the PPK format for SSH connectivity).
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Converting an object to a string
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I would recommend using JSON.stringify, which converts the set of the variables in the object to a JSON string. Most modern browsers support this method natively, but for those that don't, you can include a JS version:
var obj = {
nam...
Javascript reduce() on Object
There is nice Array method reduce() to get one value from the Array. Example:
13 Answers
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pod install -bash: pod: command not found
I installed pod some time ago. However, it's stopped working so I'm working through this again.
21 Answers
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Html.DropdownListFor selected value not being set
... look online and have seen that it can be achieved by using the fourth parameter so like the below:
13 Answers
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How do I trim a file extension from a String in Java?
...e mundane stuff, save your brain for the hard stuff.
In this case, I recommend using FilenameUtils.removeExtension() from Apache Commons IO
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Return positions of a regex match() in Javascript?
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Thanks for your help! Can you tell me also how do I find the indexes of multiple matches?
– stagas
Feb 19 '10 at 11:10
10
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iOS: UIButton resize according to text length
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Major advantages are that:
You don't need to programmatically set frames at all!
If done right, you don't need to bother about resetting frames for orientation changes.
Also, device changes needn't bother you (read, no need to code separately for different screen sizes).
A few disadvantages...