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How to grey out a button?
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I had read that calls to setAlpha are expensive on CPU. Can anyone confirm?
– Ali Kazi
Jun 15 '16 at 7:37
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What is the advantage to using bloom filters?
... of malicious URLs and the user can proceed freely. Thus we did not make a call to the server and hence saved time. A value of 1 tells us that the URL MIGHT be in the list of malicious URLs. In these cases we make a call to the remote server and over there we can use some other hash function with so...
How do I use a Boolean in Python?
...an-able concept for every object, which is used when function bool([x]) is called.
See more: object.nonzero and boolean-value-of-objects-in-python.
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Facebook Graph API v2.0+ - /me/friends returns empty, or only friends who also use my application
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In v2.0 of the Graph API, calling /me/friends returns the person's friends who also use the app.
In addition, in v2.0, you must request the user_friends permission from each user. user_friends is no longer included by default in every login. Each use...
Difference between .tagName and .nodeName
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The tagName property is meant specifically for element nodes (type 1 nodes) to get the type of element.
There are several other types of nodes as well (comment, attribute, text, etc.). To get the name of any of the various node types, you can use the nodeName ...
How do I pipe a subprocess call to a text file?
...o write the output to a file you can use the stdout-argument of subprocess.call.
It takes None, subprocess.PIPE, a file object or a file descriptor. The first is the default, stdout is inherited from the parent (your script). The second allows you to pipe from one command/process to another. The th...
Select parent element of known element in Selenium
...lect']
This just means, look for a label (it could anything like a, h2) called labelName. Navigate to the parent of that label (i.e. div class="ParentDiv"). Search within the descendants of that parent to find any child element with the value of elementToSelect. With this, it will not select the ...
Event listener for when element becomes visible?
...h User Interaction, if your code is organised enough you should be able to call the initialising function in the same place where the visibility changes (i.e. you shouldn't change myElement.style.display on many places, instead, call a function/method that does this and anything else you might want)...
PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
... of an application. In particular, rand() and uniqid() are not cryptographically secure random number generators. See Scott's answer for a secure alternative.
If you do not need it to be absolutely unique over time:
md5(uniqid(rand(), true))
Otherwise (given you have already determined a unique ...
JPA: How to have one-to-many relation of the same Entity type
...dress, I followed your suggestion to update both the User and Address (and call 'save' on both). But this resulted in a duplicate row being inserted into my Address table. Is this because I have misconfigured my CascadeType on the User's address field?
– Alex
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