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Docker build “Could not resolve 'archive.ubuntu.com'” apt-get fails to install anything
...'google.com'", then you have the same problem as me.
The nslookup command queries the DNS server 8.8.8.8 in order to turn the text address of 'google.com' into an IP address. Ironically, 8.8.8.8 is Google's public DNS server. If nslookup fails, public DNS servers like 8.8.8.8 might be blocked by yo...
Deleting array elements in JavaScript - delete vs splice
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delete will delete the object property, but will not reindex the array or update its length. This makes it appears as if it is undefined:
> myArray = ['a', 'b', 'c', 'd']
["a", "b", "c", "d"]
> delete myArray[0]
true
> myArray[0]
undefined
Note that it is not in...
Javascript: Extend a Function
...r funcs = initFunctions;
initFunctions = undefined;
for (index = 0; index < funcs.length; ++index) {
try { funcs[index](); } catch (e) { }
}
}
publicSymbols.addInitFunction = addInitFunction;
function addInitFunction(f) {
if (initFunction...
Eclipse and Windows newlines
...lowing in a unix shell:
find ./ -wholename "\*CVS/[RE]\*" -exec dos2unix -q -o {} \;
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How to forward declare a template class in namespace std?
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Check out this answer (stackoverflow.com/questions/307343/…) and the linked newsgroup discussion.
– Jon Purdy
Oct 7 '10 at 6:49
7
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Create Git branch with current changes
...the "destructive" effect of a git reset --hard command (it does resets the index and working tree. Any changes to tracked files in the working tree since <commit> are discarded), I would rather go with:
$ git reset --soft HEAD~3 # (2)
This would make sure I'm not losing any private file (n...
How do I write a bash script to restart a process if it dies?
I have a python script that'll be checking a queue and performing an action on each item:
8 Answers
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How do I connect to a specific Wi-Fi network in Android programmatically?
...nfiguration();
conf.SSID = "\"" + networkSSID + "\""; // Please note the quotes. String should contain ssid in quotes
Then, for WEP network you need to do this:
conf.wepKeys[0] = "\"" + networkPass + "\"";
conf.wepTxKeyIndex = 0;
conf.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.NONE);
c...
Is the SQL WHERE clause short-circuit evaluated?
...hrough its optimization algorithm that takes into account a lot of things (indexes, statistics, table size, resources, etc) to come up with an effective execution plan. After this evaluation, you can't say for sure that your short circuit logic is guaranteed.
I ran into the same question myself so...
Change values while iterating
...lue (if 2nd variable is present)
array or slice a [n]E, *[n]E, or []E index i int a[i] E
So, range uses a[i] as its second value for arrays/slices, which effectively means that the
value is copied, making the original value untouchable.
This behavior is demonstrated by the f...