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How to get element by classname or id
... = element[0].getElementsByClassName('multi-files');
}
Alternatively you can use the document.querySelector function (need the period here if selecting by class):
var queryResult = element[0].querySelector('.multi-files');
var wrappedQueryResult = angular.element(queryResult);
Demo: http://plnk...
How to catch SQLServer timeout exceptions
I need to specifically catch SQL server timeout exceptions so that they can be handled differently. I know I could catch the SqlException and then check if the message string Contains "Timeout" but was wondering if there is a better way to do it?
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How to define two fields “unique” as couple
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There is a simple solution for you called unique_together which does exactly what you want.
For example:
class MyModel(models.Model):
field1 = models.CharField(max_length=50)
field2 = models.CharField(max_length=50)
class Meta:
unique_together = (...
How to rollback just one step using rake db:migrate
...k
Roll back the n most recent migrations:
rake db:rollback STEP=n
You can find full instructions on the use of Rails migration tasks for rake on the Rails Guide for running migrations.
Here's some more:
rake db:migrate - Run all migrations that haven't been run already
rake db:migrate VERS...
XML schema or DTD for logback.xml?
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However, due to extreme flexibility of the Logback configuration, Schema cannot support all possible configuration options.
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How can I calculate the time between 2 Dates in typescript
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@KenLyon From MDN getTime documentation: You can use this method to help assign a date and time to another Date object. This method is functionally equivalent to the valueOf() method.
– PhoneixS
Mar 6 '18 at 10:35
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How to determine function name from inside a function
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You can use ${FUNCNAME[0]} in bash to get the function name.
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Rails: convert UTC DateTime to another time zone
...ne)
Example:
zone = ActiveSupport::TimeZone.new("Central Time (US & Canada)")
Time.now.in_time_zone(zone)
or just
Time.now.in_time_zone("Central Time (US & Canada)")
You can find the names of the ActiveSupport time zones by doing:
ActiveSupport::TimeZone.all.map(&:name)
# or for...
LD_LIBRARY_PATH vs LIBRARY_PATH
... successfully compiled and linked.
EDIT:
As pointed below, your libraries can be static or shared. If it is static then the code is copied over into your program and you don't need to search for the library after your program is compiled and linked. If your library is shared then it needs to be dyn...
Heroku free account limited?
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Heroku provides, for free, 1 dyno. A dyno is an instance of your application running and responding to requests. If each instance of your application can serve each request in 100ms, then you get 600 requests/minute with the free account.
Your application code and its assets (the slug) are lim...