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How can I check the size of a collection within a Django template?
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See https://docs.djangoproject.com/en/stable/ref/templates/builtins/#if : just use, to reproduce their example:
{% if athlete_list %}
Number of athletes: {{ athlete_list|length }}
{% else %}
No athletes.
{% endif %}
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How to prevent a background process from being stopped after closing SSH client in Linux
...-ar] [jobspec ...]
By default, removes each JOBSPEC argument from the table of active jobs.
If the -h option is given, the job is not removed from the table, but is
marked so that SIGHUP is not sent to the job if the shell receives a
SIGHUP. The -a option, when JOBSPEC is not suppl...
How to generate a new Guid in stored procedure?
...urrently have a stored procedure in which I want to insert new rows into a table.
5 Answers
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How to use DISTINCT and ORDER BY in same SELECT statement?
..., such as Order, event, etc. so if you have (for example) a column in your table called Event you can write [Event] instead of Event to stop SQL throwing a parse error.
– Ben Maxfield
Oct 24 '16 at 21:26
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Multiline string literal in C#
... to form a verbatim string literal:
string query = @"SELECT foo, bar
FROM table
WHERE id = 42";
You also do not have to escape special characters when you use this method, except for double quotes as shown in Jon Skeet's answer.
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Add days to JavaScript Date
... and that sort of thing is best avoided. ECMA saw fit to treat Date as a mutable class rather than an immutable structure.
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HTML span align center not working?
...wing style. margin:auto normally used to center align the content. display:table is needed for span element
<span style="margin:auto; display:table; border:1px solid red;">
This is some text in a div element!
</span>
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NSLog the method name with Objective-C in iPhone
...t because the Objective-C runtime is dynamic, it's actually using a lookup table to figure out which method on which class to call so a char* is convenient since methods are represented as strings in the lookup table.
– Jack Lawrence
Nov 7 '12 at 16:42
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What is the difference between a map and a dictionary?
... languages use still other terms ("Object" in Javascript, "Hash" in Ruby, "Table" in Lua), but those all have separate meanings in programming too, so I'd avoid them.
See here for more info.
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Printing all global variables/local variables?
... @cpuer: Not necessarily. It only displays the name in the symbol table. For instance, with gcc on Mac a static variable y is renamed to y.1913 on compilation.
– kennytm
Jun 7 '11 at 7:14
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