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GCD to perform task in main thread
...
No, you do not need to check whether you’re already on the main thread. By dispatching the block to the main queue, you’re just scheduling the block to be executed serially on the main thread, which happens when the corresponding run loop is run.
If you already are on the main thread, the beha...
Different bash prompt for different vi editing mode?
...putrc
Inputrc has an option to show a + for insert and : for normal mode, by adding set show-mode-in-prompt on in the ~/.inputrc as eMPee584 wrote, but this does not work well with multiline prompt (with older versions of bash and readline).
A solution is have a single line PS1 (>), and a funct...
Using :before CSS pseudo element to add image to modal
... Now (in 2017), IE 11 is the only version of IE still supported by Microsoft; so, there is not much point in worrying about IE8 compatability. Also, a CSS solution is almost always better than the jQuery solution because they tend to load much faster and jQuery can cause screen flicker b...
How do I exit from the text window in Git?
...onfigured for use. In vim, you can press i to start entering text and save by pressing esc and :wq and enter, this will commit with the message you typed. In your current state, to just come out without committing, you can do :q instead of the :wq as mentioned above.
Alternatively, you can just do ...
Array or List in Java. Which is faster?
... when adding more than once, e.g. capacity is doubled instead of increased by just 1.
– zedoo
Jul 25 '12 at 22:03
@zed...
How can I add a hint text to WPF textbox?
...nt="Please enter your text" not 20 elements... Alas, this is not supported by the legendary built in text box...
– Mzn
Nov 29 '14 at 12:54
8
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When to wrap quotes around a shell variable?
... $ for word in $words; do
> echo "$word"
> done
foo
bar
baz
By contrast:
$ for word in "$words"; do echo "$word"; done
foo bar baz
(The loop only runs once, over the single, quoted string.)
$ for word in '$words'; do echo "$word"; done
$words
(The loop only runs once, over t...
How do I print a double value without scientific notation using Java?
...ic notations if double is less than 10^-3 or greater than or equal to 10^7
By using %f, the default decimal precision is 6, otherwise you can hardcode it, but it results in extra zeros added if you have fewer decimals. Example:
double myValue = 0.00000021d;
String.format("%.12f", myvalue); // Outpu...
JavaScript and Threads
...amHasler You may want to revise your answer. Web workers are now supported by all modern desktop browsers. See also caniuse.com/#search=worker
– Rob W
Apr 6 '13 at 8:42
2
...
Catch a thread's exception in the caller thread in Python
...think of right now to communicate this information to the parent thread is by using some sort of message passing, so you might look into that.
Try this on for size:
import sys
import threading
import Queue
class ExcThread(threading.Thread):
def __init__(self, bucket):
threading.Thre...