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ImportError: No module named MySQLdb
...n here, and getting environment error: mysql_config not found kinda thing, then sudo apt-get install libmysqlclient-dev can help you. Original answer: stackoverflow.com/a/5178698/2190689
– ssi-anik
Nov 11 '16 at 18:11
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Searching if value exists in a list of objects using Linq
Say I have a class Customer which has a property FirstName . Then I have a List<Customer> .
9 Answers
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Finding the average of a list
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@FooBarUser then you should calc k = 1.0/len(l), and then reduce: reduce(lambda x, y: x + y * k, l)
– Arseniy
May 14 '14 at 5:09
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Heroku deployment error H10 (App crashed)
...roblem by pushing to Git:
git add .
git commit -am "some text"
git push
then push to Heroku:
git push heroku
then rake db:migrate on Heroku:
heroku run rake db:migrate
convert a list of objects from one type to another using lambda expression
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If you know you want to convert from List<T1> to List<T2> then List<T>.ConvertAll will be slightly more efficient than Select/ToList because it knows the exact size to start with:
target = orig.ConvertAll(x => new TargetType { SomeValue = x.SomeValue });
In the more gene...
How to iterate over a JSONObject?
...g the key lookup twice? Maybe better to do 'Object o = jObject.get(key)', then check its type and then use it, without having to call get(key) again.
– Tom
May 30 '14 at 17:23
1
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How do the Proxy, Decorator, Adapter, and Bridge Patterns differ?
... what if you want to duplicate the interface of the wrapped object 1:1 but then add a few additional methods? Is this a decorator or an adapter?
– donquixote
Jul 9 '14 at 4:00
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Submitting a form on 'Enter' with jQuery?
...rm and have it naturally be submitted when enter is pushed? You could even then hook the form's onsubmit action and call a validation function from there if you wanted...
You could even use the onsubmit as a test to see if your form is being submitted, but it won't work if you call form.submit().
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Check if a string has white space
...espace('\r')); // carriage return, true
If you don't want to use Lodash, then here is a simple some implementation with 2 s:
const ssome = (predicate, list) =>
{
const len = list.length;
for(const i = 0; i<len; i++)
{
if(predicate(list[i]) === true) {
return true;
}
}
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Git / Bower Errors: Exit Code # 128 & Failed connect
...ears as though azsl1326 failed to use bower (git) over port 9418 (git://), then told git to use port 22 (https://) instead. This was still failing, but then opening port 22 got the desired result.
The most direct solution is to open port 9418. This is the port that the git:// protocol uses.
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