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Validating IPv4 addresses with regexp

...considered a valid IP? It also gets matched by this regex. But ping throws error message like ping: cannot resolve 09.09.09.09: Unknown host. I think it might be wise to reduce the matching to dot-decimal notation matching only. This entry discusses on leading errors in IP addresses. ...
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how to view the contents of a .pem certificate

... I am getting the error java.lang.Exception: Failed to parse input – maxisme Jun 6 '14 at 0:19 10 ...
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How do I run a terminal inside of Vim?

...n't distribute vim with +python) and after installing ConqueTerm, I get an error from #set_buffer_settings. I haven't been able to track down where that function lives, or get any idea of what the error means. The message includes a statement about an invalid argument "edit ++enc=utf-8 bash\ -\ 2"...
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What does a lazy val do?

...hread.sleep(2000); 13 } } defined class Y scala> new X res5: X = X@262505b7 // we have to wait two seconds to the result scala> new Y res6: Y = Y@1555bd22 // this appears immediately Here, when the values x and y are never used, only x unnecessarily wasting resources. If we suppose that y ...
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startsWith() and endsWith() functions in PHP

... $haystack[0] will throw a notice error if you don't test it with isset. The same for needles. But if you add tests, it will slow down its performance – Thanh Trung Apr 15 '18 at 18:12 ...
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Bypass popup blocker on window.open when JQuery event.preventDefault() is set

...cess: function(status) { if (status == null) { alert("Error in verifying the status."); } else if(!status) { $("#agreement").dialog("open"); } else { window.open(redirectionURL); } } }); Again, I don't advocate synchronous aj...
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Can an Android NFC phone act as an NFC tag?

... | edited Feb 8 '12 at 14:05 answered Feb 5 '12 at 14:09 Jo...
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How to avoid “ConcurrentModificationException” while removing elements from `ArrayList` while iterat

... Eugene 7,67733 gold badges3030 silver badges5050 bronze badges answered Aug 26 '13 at 16:35 Kevin DiTragliaKevin DiTraglia ...
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What does character set and collation mean exactly?

... revo 41.8k1313 gold badges6161 silver badges105105 bronze badges answered Dec 4 '08 at 17:02 Dan EsparzaDan Esparza 26.4k27...
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What is the meaning of #XXX in code comments?

... | edited Feb 27 at 0:05 Flux 4,50133 gold badges1818 silver badges5050 bronze badges answered Sep 2...