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Difference between wait() and sleep()
...aited on whereas a sleep cannot. Also a wait (and notify) must happen in a block synchronized on the monitor object whereas sleep does not:
Object mon = ...;
synchronized (mon) {
mon.wait();
}
At this point the currently executing thread waits and releases the monitor. Another thread may do
...
How to declare a type as nullable in TypeScript?
...y might be invalid. To make the code robust, you should probably use an if block to check for null first, like this: if (emp) { console.log(emp.id); } If you use such an if-block, the TypeScript compiler and the editor "see" that the object inside the block is not null and thus will not generate err...
Using semicolon (;) vs plus (+) with exec in find
...ind . -name 'test*' -exec echo {} \;
./test.c
./test.cpp
./test.new
./test.php
./test.py
./test.sh
With a plus, the command echo is called once only. Every file found is passed in as an argument.
$ find . -name 'test*' -exec echo {} \+
./test.c ./test.cpp ./test.new ./test.php ./test.py ./test.s...
String variable interpolation Java [duplicate]
...P 326 (Raw String Literals) was withdrawn and superseeded by JEP 355 (Text Blocks). The latter tries to introduce "Text Blocks" into the language:
A text block is a multi-line string literal that avoids the need for
most escape sequences, automatically formats the string in a
predictable way...
How to disable typing special characters when pressing option key in Mac OS X? [closed]
...is to download Ukulele from here:
http://scripts.sil.org/cms/scripts/page.php?site_id=nrsi&id=ukelele
In the application you can create a new keylayout using File -> New from current source. Pressing Option will show you in the place for Option-b a red colored key - meaning it's a dead key....
Grep for literal strings
...nothing will be found. So this didn't return any result: grep --include=\*.php -FRn -e "$$" Using single quoutes gave me the wanted result: grep --include=\*.php -FRn -e '$$'
– Piemol
Nov 15 '17 at 13:16
...
How to make an image center (vertically & horizontally) inside a bigger div [duplicate]
...
This works correctly:
display: block;
margin-left: auto;
margin-right: auto
else try this if the above only gives you horizontal centering:
.outerContainer {
position: relative;
}
.innerContainer {
width: 50px; //your image/element width here
...
CSS horizontal centering of a fixed div?
...
If using inline-blocks is an option I would recommend this approach:
.container {
/* fixed position a zero-height full width container */
position: fixed;
top: 0; /* or whatever position is desired */
left: 0;
right: 0;...
Best way to define private methods for a class in Objective-C
...
Defining your private methods in the @implementation block is ideal for most purposes. Clang will see these within the @implementation, regardless of declaration order. There is no need to declare them in a class continuation (aka class extension) or named category.
In some ca...
A CSS selector to get last visible div
...n the next element when the previous one is visible:
div[style='display: block;'] + table {
filter: blur(3px);
}
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