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Difference between dispatch_async and dispatch_sync on serial queue?
... of tasks. The only difference is that dispatch_sync only return after the block is finished whereas dispatch_async return after it is added to the queue and may not finished.
for this code
dispatch_async(_serialQueue, ^{ printf("1"); });
printf("2");
dispatch_async(_serialQueue, ^{ printf("3"); }...
How to make an inline-block element fill the remainder of the line?
Is such a thing possible using CSS and two inline-block (or whatever) DIV tags instead of using a table?
7 Answers
...
How do I iterate through table rows and cells in JavaScript?
... Is that even JavaScript? Because your for loop looks somewhat like PHP.
– aravk33
Sep 28 '17 at 13:30
2
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Why are empty catch blocks a bad idea? [closed]
...question on try-catch , which people (including Jon Skeet) say empty catch blocks are a really bad idea? Why this? Is there no situation where an empty catch is not a wrong design decision?
...
“The Controls collection cannot be modified because the control contains code blocks”
...
First, start the code block with <%# instead of <%= :
<head id="head1" runat="server">
<title>My Page</title>
<link href="css/common.css" rel="stylesheet" type="text/css" />
<script type="text/javascript" ...
How do I animate constraint changes?
...wo important notes:
You need to call layoutIfNeeded within the animation block. Apple actually recommends you call it once before the animation block to ensure that all pending layout operations have been completed
You need to call it specifically on the parent view (e.g. self.view), not the ch...
Comparison of DES, Triple DES, AES, blowfish encryption for data
..., as has been demonstrated more than ten years ago). Also, DES uses 64-bit blocks, which raises some potential issues when encrypting several gigabytes of data with the same key (a gigabyte is not that big nowadays).
3DES is a trick to reuse DES implementations, by cascading three instances of DES (...
What is the difference between HTML tags and ?
...
div is a block element
span is an inline element.
This means that to use them semantically, divs should be used to wrap sections of a document, while spans should be used to wrap small portions of text, images, etc.
For example:
&...
How to deploy correctly when using Composer's develop / production switch?
...d hosting, you might not be able to get to a command line
even if you did, PHP might be restricted there in terms of commands, memory or network access
repository CLI tools (Git, Svn) are likely to not be installed, which would fail if your lock file has recorded a dependency to checkout a certain c...
C++ performance challenge: integer to std::string conversion
...gt;
std::string itostr(T o) {
typedef itostr_helper hlp;
unsigned blocks[3], *b = blocks + 2;
blocks[0] = o < 0 ? ~o + 1 : o;
blocks[2] = blocks[0] % 10000; blocks[0] /= 10000;
blocks[2] = hlp::out[blocks[2]];
if (blocks[0]) {
blocks[1] = blocks[0] % 10000; block...