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instantiate a class from a variable in PHP?
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If you work with namespace, put the current namespace into the string: $var = __NAMESPACE__ . '\\' . $var . 'Class';
– bastey
Sep 2 '13 at 13:28
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how to run two commands in sudo?
...o ttt; db2 UPDATE CONTACT SET EMAIL_ADDRESS = 'mytestaccount@gmail.com'"
If your sudo version doesn't work with semicolons with -s (apparently, it doesn't if compiled with certain options), you can use
sudo -- sh -c 'whoami; whoami'
instead, which basically does the same thing but makes you na...
.gitignore after commit [duplicate]
...ce you probably want to keep the local copy but remove from the repo. ) So if you want to remove all the exe's from your repo do
git rm --cached /\*.exe
(Note that the asterisk * is quoted from the shell - this lets git, and not the shell, expand the pathnames of files and subdirectories)
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setTimeout in for-loop does not print consecutive values [duplicate]
...alert(i); }, 100);
}
for (var i = 1; i <= 2; ++i)
doSetTimeout(i);
If you don't do something like this (and there are other variations on this same idea), then each of the timer handler functions will share the same variable "i". When the loop is finished, what's the value of "i"? It's 3! ...
Write lines of text to a file in R
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Mark - what If I have several threads all of which I would like to add lines to the same file? (The issue being is that you can't have more then one connection to a file, If I am not mistaken) Thanks.
– Tal Galili
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Where to place JavaScript in an HTML file?
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For example, if you're going to be doing a bunch of jQuery stuff, you would need the library loaded before you actually try to make use of it.
– BryanH
Jul 8 '09 at 22:09
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Is double square brackets [[ ]] preferable over single square brackets [ ] in Bash?
... and is generally safer to use. But it is not portable - POSIX doesn't specify what it does and only some shells support it (beside bash, I heard ksh supports it too). For example, you can do
[[ -e $b ]]
to test whether a file exists. But with [, you have to quote $b, because it splits the argum...
How are people managing authentication in Go? [closed]
...null
)
When a user logs in to your site via a POST under TLS, determine if the password is valid.
Then issue a random session key, say 50 or more crypto rand characters and stuff in a secure Cookie.
Add that session key to the UserSession table.
Then when you see that user again, first hit the Us...
How to find the sum of an array of numbers
...(function(acc, val) { return acc + val; }, 0)
)
Non-number inputs
If non-numbers are possible inputs, you may want to handle that?
console.log(
["hi", 1, 2, "frog"].reduce((a, b) => a + b)
)
let numOr0 = n => isNaN(n) ? 0 : n
console.log(
["hi", 1, 2, "frog"].reduce((...
Why do I get the error “Unsafe code may only appear if compiling with /unsafe”?
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@Nick: Yes, if you publish code to be compiled dynamically, then the project settings doesn't apply. See stackoverflow.com/questions/16567197/…
– Guffa
Sep 17 '13 at 14:41
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