breakpoints - w3toppers.com

How to set a JavaScript breakpoint from code in Chrome?

You can use debugger; within your code. If the developer console is open, execution will break. It works in firebug as well.

“Thread 1: stopped at breakpoint” error when initializing an NSURL object

You’re stopped at a breakpoint. That’s a debugging tool, not an error. See the blue arrow/tab in the left margin, where the line numbers are? Drag that away and drop it anywhere (you’ll see a “poof”) to remove it, then run your project again. You can also deactivate all breakpoints by typing ⌘–Y, the key … Read more

Can I set a breakpoint on ‘memory access’ in GDB?

watch only breaks on write, rwatch let you break on read, and awatch let you break on read/write. You can set read watchpoints on memory locations: gdb$ rwatch *0xfeedface Hardware read watchpoint 2: *0xfeedface but one limitation applies to the rwatch and awatch commands; you can’t use gdb variables in expressions: gdb$ rwatch $ebx+0xec1a04f Expression … Read more

After calling chrome.tabs.query, the results are not available

Your problem can be simplified to: /*1.*/ var fourmTabs = []; /*2.*/ chrome.tabs.query({}, function(tabs) { /*3.*/ fourmTabs[0] = tabs[0]; /*4.*/ }); /*5.*/ console.log(fourmTabs[0]); You expect that the fourmTabs array is updated (by line 3) when line 5 is reached. That is wrong, because the chrome.tabs.query method is asynchronous. In an attempt to make you understand … Read more