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How do I check if a column is empty or null in MySQL?
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This will select all rows where some_col is NULL or '' (empty string)
SELECT * FROM table WHERE some_col IS NULL OR some_col = '';
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Go to particular revision
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git checkout -b <new_branch_name> <sha1> : to check out the commit to a branch.
– Loganathan
Jul 16 at 13:50
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Wait 5 seconds before executing next line
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You have to put your code in the callback function you supply to setTimeout:
function stateChange(newState) {
setTimeout(function () {
if (newState == -1) {
alert('VIDEO HAS STOPPED');
}
}, 5000);
}
Any other code will execute immediately.
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iPhone: How to switch tabs with an animation?
...nd if you find one. Please add a response so everyone can see. Thanks.
Some time later ...
After much research I came up with two working solutions. Both of these worked and did the animation between tabs.
Solution 1: transition from view (simple)
This is the easiest and makes use of a predefin...
Java equivalent to C# extension methods
I am looking to implement a functionality in a list of object as I would in C# using an extension method.
14 Answers
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Using 'return' in a Ruby block
...call'
from (irb):2:in `thing'
from (irb):6
from /home/mirko/.rvm/rubies/ruby-1.9.1-p378/bin/irb:15:in `<main>'
irb(main):009:0> thing { break 6 * 7 }
=> 42
irb(main):011:0> thing { next 6 * 7 }
value=42
=> nil
return always returns from method, but if you...
How to download image using requests
... you feel another chunk size works better, use the Response.iter_content() method with a custom chunk size:
r = requests.get(settings.STATICMAP_URL.format(**data), stream=True)
if r.status_code == 200:
with open(path, 'wb') as f:
for chunk in r.iter_content(1024):
f.write(ch...
Determining if a number is either a multiple of ten or within a particular set of ranges
...urn (num - 1) / 10;
}
if (getRow(num) % 2 == 0) {
}
It's the same logic, but by using the function we get a clearer idea of what it means.
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Redirect all to index.php using htaccess
I'm writing a simple PHP-based MVC-ish framework. I want this framework to be able to be installed in any directory.
7 Answ...
C++ performance vs. Java/C#
...m impossible for Java or C# to match the speed of C++ because of this intermediate step, however I've been told that the latest compilers ("hot spot") can attain this speed or even exceed it.
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