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When to use IMG vs. CSS background-image?
...ze.
Use IMG
for multiple overlay images in IE6.
Use IMG with a z-index in order
to stretch a background image to fill its entire window.Note, this is no longer true with CSS3 background-size; see #6 below.
Using img instead of background-image can dramatically improve performance of animations ove...
How do I add more members to my ENUM-type column in MySQL?
...o the end is fine, since you just add meaning old values. but changing the order / removing enums will make those numbers undefined. (eg. 1=>italy, 2=>germany), then extending will be (1=>italy, 2=>germany, 3=>sweenden).
– lintabá
Mar 21 '19 at ...
What is the difference between a 'closure' and a 'lambda'?
... )
OK, now it's time to solve the other mystery: what is a closure.
In order to do that, let's talk about symbols (variables) in lambda expressions.
As I said, what the lambda abstraction does is binding a symbol in its subexpression, so that it becomes a substitutible parameter. Such a symbol ...
What's the difference between HEAD^ and HEAD~ in Git?
...Both commit nodes B and C are parents of commit node A. Parent commits are ordered left-to-right. (N.B. The git log --graph command displays history in the opposite order.)
G H I J
\ / \ /
D E F
\ | / \
\ | / |
\|/ |
B C
\ /
\ /
...
How do C++ class members get initialized if I don't do it explicitly?
... mem-initializer-list, and members can only be initialized in a prescribed order (basically the order in which the members are declared in the class). Thus, the members of Example can only be initialized in the order: ptr, name, pname, rname, crname, and age.
When you do not specify a mem-initializ...
Force R not to use exponential notation (e.g. e+10)?
...
Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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Who architected / designed C++'s IOStreams, and would it still be considered well-designed by today'
...ontext for the translators. If your string formatting routine supports re-ordering (like the POSIX $ printf parameters), then it also better handles differences in word order between languages.
share
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View's getWidth() and getHeight() returns 0
..., etc. as stated by Romain Guy:
The UI event queue will process events in order. After
setContentView() is invoked, the event queue will contain a message
asking for a relayout, so anything you post to the queue will happen
after the layout pass
Example:
final View view=//smth;
...
view.post(new R...
How to add a delay for a 2 or 3 seconds [closed]
.... As for my case, I need to sleep the thread for 0.6 seconds precisely in order to avoid an index constrain when inserting into the database.
– GunWanderer
Apr 19 '18 at 16:48
...
Replacing NAs with latest non-NA value
... = TRUE), y = sample(c(1:4, rep(NA, 4)), 20 , replace = TRUE))
dt <- dt[order(group)]
dt[, y_forward_fill := y[1], .(group, cumsum(!is.na(y)))]
dt
group y y_forward_fill
1: a NA NA
2: a NA NA
3: a NA NA
4: a 2 2
5: a ...