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Is using 'var' to declare variables optional? [duplicate]
...
They mean different things.
If you use var the variable is declared within the scope you are in (e.g. of the function). If you don't use var, the variable bubbles up through the layers of scope until it encounters a variable by the give...
Handle file download from ajax post
...eate a form, use the POST method, submit the form - there's no need for an iframe. When the server page responds to the request, write a response header for the mime type of the file, and it will present a download dialog - I've done this a number of times.
You want content-type of application/dow...
403 Forbidden vs 401 Unauthorized HTTP responses
...re–but you just don’t have
permission to access this resource. Maybe if you ask the system
administrator nicely, you’ll get permission. But please don’t bother
me again until your predicament changes.”
In summary, a 401 Unauthorized response should be used for missing
or bad a...
Should programmers use SSIS, and if so, why? [closed]
...maybe some limited transformation and conditional branching along the way. If your packages contain a lot of script then your team is using SSIS for the wrong tasks or isn't comfortable with SQL or has bought into the hype. SSIS packages are very difficult to debug. Script components are an absolute...
How do I accomplish an if/else in mustache.js?
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This is how you do if/else in Mustache (perfectly supported):
{{#repo}}
<b>{{name}}</b>
{{/repo}}
{{^repo}}
No repos :(
{{/repo}}
Or in your case:
{{#author}}
{{#avatar}}
<img src="{{avatar}}"/>
{{/avatar}}
{...
How to avoid “RuntimeError: dictionary changed size during iteration” error?
....x calling keys makes a copy of the key that you can iterate over while modifying the dict:
for i in d.keys():
Note that this doesn't work in Python 3.x because keys returns an iterator instead of a list.
Another way is to use list to force a copy of the keys to be made. This one also works in P...
How to set current working directory to the directory of the script in bash?
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It's worth noting that things can break if a symbolic link makes up part of $0. In your script you may expect, for example, ../../ to refer to the directory two levels above the script's location, but this isn't necessarily the case if symbolic links are in play.
...
How can I convert a comma-separated string to an array?
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While split will work fine if you are sure you have elements in array, if you're expecting data from a server / database you will run into trouble since ''.split(',') has a length === 1 IE: ''.split(',') === ['']
– oportocala
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Does a finally block always get executed in Java?
...e try or catch code blocks.
The only times finally won't be called are:
If you invoke System.exit()
If you invoke Runtime.getRuntime().halt(exitStatus)
If the JVM crashes first
If the JVM reaches an infinite loop (or some other non-interruptable, non-terminating statement) in the try or catch blo...
Get key by value in dictionary
...items(): # for name, age in dictionary.iteritems(): (for Python 2.x)
if age == search_age:
print(name)
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