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How can I check for an empty/undefined/null string in JavaScript?
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Testing the length property may actually be faster than testing the string against "", because the interpreter won't have to create a String object from the string literal.
– Vincent Robert
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How to deploy correctly when using Composer's develop / production switch?
...n theory) very handy for scripts that only make sense in development, like tests, fake-data-tools, debugger, etc.
5 Answers...
Maximum size of a element
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Updated 10/13/2014
All tested browsers have limits to the height/width of canvas elements, but many browsers also limit the total area of the canvas element. The limits are as follows for the browsers I'm able to test:
Chrome:
Maximum height/widt...
Where is array's length property defined?
...tuff = stuff;
}
}
public static void main(String[] args) {
int[] test = new int[5];
test[0] = 2;
test[1] = 33;
System.out.println("Length of int[]:\t" + test.length);
String[] test2 = new String[5];
test2[0] = "2";
test2[1] = "33";
System.out.println("Lengt...
Delete first character of a string in Javascript
... shows "oobar"
To remove all 0's at the start of the string:
var s = "0000test";
while(s.charAt(0) === '0')
{
s = s.substring(1);
}
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Cross-browser testing: All major browsers on ONE machine
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Contents
Which browsers have to be tested?
Rules of thumb: Which browsers should be included?
Preparation
Windows XP
Windows 7+ (for IE9+)
Browser downloads
Internet Explorer
Firefox
Opera
Chrome
Safari
Adobe Flash Pl...
Cannot open database “test” requested by the login. The login failed. Login failed for user 'xyz\ASP
...ring to something like:
connectionString="Server=.\SQLExpress;Database=IFItest;User ID=xyz;pwd=top$secret"
If you have a user "xyz" with a password of "top$secret" in your database.
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Which timestamp type should I choose in a PostgreSQL database?
... NULL DEFAULT NOW(),
CHECK(EXTRACT(TIMEZONE FROM my_timestamp) = '0')
);
test=> SET timezone = 'America/Los_Angeles';
SET
test=> INSERT INTO my_tbl (my_timestamp) VALUES (NOW());
ERROR: new row for relation "my_tbl" violates check constraint "my_tbl_my_timestamp_check"
test=> SET timezon...
Package structure for a Java project?
... you have a choice. It's a well-thought out structure that has been battle-tested, and is familiar to many developers.
– Dov Wasserman
Oct 17 '08 at 4:46
15
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Performance of foreach, array_map with lambda and array_map with static function
...osure was caused by the closure possibly being evaluated each time, I also tested like this:
function useMapClosure($numbers) {
$closure = function($number) {
return $number * 10;
};
return array_map($closure, $numbers);
}
But the results are identical, confirming that the closure is ...