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Testing for empty or nil-value string [duplicate]
...em:
An object is blank if it’s false, empty, or a whitespace string. For example, "", " ", nil, [], and {} are all blank.
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Deleting Row in SQLite in Android
...ause this solution allows to do an SQL injection which is a security leak. For instance: use the value of the name argument: name = "TRUE; <any SQL command>;" => 'any SQL command' will be executed. Of course it is not a problem if there is no GUI for that feature.
– bd...
CSS scrollbar style cross browser [duplicate]
...ty invented by Microsoft developers. They are not part of the W3C standard for CSS and therefore most browsers just ignore them.
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廉价共享存储解决方案2-drbd+cman+gfs2 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...lic/private rsa key pair.
Enter file in which to save the key (/root/.ssh/id_rsa):
Your identification has been saved in /root/.ssh/id_rsa.
Your public key has been saved in /root/.ssh/id_rsa.pub.
The key fingerprint is:
a9:8a:3a:3d:64:eb:0b:de:94:a5:92:e4:ba:5d:f3:de root@gfs_1
The key's rand...
Show hide fragment in android
...lags of the container - FragmentTransaction.hide/show does that internally for you.
So the correct way to do this is:
FragmentManager fm = getFragmentManager();
fm.beginTransaction()
.setCustomAnimations(android.R.animator.fade_in, android.R.animator.fade_out)
.show(somefrag)
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Fling gesture detection on grid layout
... gesture listener to all the views you add to the main layout;
// Do this for each view added to the grid
imageView.setOnClickListener(SelectFilterActivity.this);
imageView.setOnTouchListener(gestureListener);
Watch in awe as your overridden methods are hit, both the onClick(View v) of the activ...
SVN+SSH, not having to do ssh-add every time? (Mac OS)
...e into ~/.ssh. This is not strictly necessary but it's the standard place for such things.
Then run ssh-add -K ~/.ssh/privateKey.txt. It'll prompt for your passphrase if necessary, then add it to your Keychain.
After that, you shouldn't have to do anything else. A slightly longer explanation is...
How do I trigger the success callback on a model.save()?
...ttribute name-values? (2) What if you just want to save the model after performing some .set()s - why the attribute list? (3) In the docs, the attribute list param is shown as optional. Can you clarify? Thanks.
– UpTheCreek
Sep 21 '11 at 13:19
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How may I align text to the left and text to the right in the same line?
...you, with all styling in-line, I soon realized that there are good reasons for separating content & presentation . CSS isn't scary & there are plenty of free tutorials around - go for it
– Mawg says reinstate Monica
Dec 15 '16 at 23:51
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Why is iterating through a large Django QuerySet consuming massive amounts of memory?
...le, and it executes its database query the first time you iterate over it. For example, this will print the headline of all entries in the database:
for e in Entry.objects.all():
print e.headline
So your ten million rows are retrieved, all at once, when you first enter that loop and get t...