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Understanding dispatch_async
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All of the DISPATCH_QUEUE_PRIORITY_X queues are concurrent queues (meaning they can execute multiple tasks at once), and are FIFO in the sense that tasks within a given queue will begin executing using "first in, first out" order. This is in comparison to the main queue (from dispatch_get_ma...
How to have an automatic timestamp in SQLite?
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Just declare a default value for a field:
CREATE TABLE MyTable(
ID INTEGER PRIMARY KEY,
Name TEXT,
Other STUFF,
Timestamp DATETIME DEFAULT CURRENT_TIMESTAMP
);
However, if your INSERT command explicitly sets this field to NULL, it will be set to NULL.
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Making code internal but available for unit testing from other projects
... class that accesses everything via reflection. MSTest does that.
Edit: I mean, if you don't want to include -any- testing stuff in your original assembly; this also works if the members are private.
share
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“git rm --cached x” vs “git reset head -- x”?
... Can you tell me what does that double hyphen -- after HEAD actually means?
– yuva
Nov 6 '14 at 9:22
31
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Returning value from called function in a shell script
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@alex can you give an example of what you mean by "parameterized function"?
– glenn jackman
Jul 29 '16 at 11:28
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How to change max_allowed_packet size
...on. He made a mistake of putting it at the bottom of the file first so it did not work.
6) Control + O (save) then ENTER (confirm) then Control + X (exit file)
7) service mysqld restart
8) You can check the change in the variables section on phpmyadmin
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Check if a temporary table exists and delete if it exists before creating a temporary table
...e the columns. If I add a column later, it will give an error saying "invalid column". Please let me know what I am doing wrong.
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What is an existential type?
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(continued:) 2. I don't fully understand the meaning of the mathematical notation in List<∃B:VirtualMachine<B>> vms or for (∃B:VirtualMachine<B> vm : vms). (Since these are generic types, couldn't you have used Java's ? wildcards instead of "self-m...
Underscore vs Double underscore with variables and methods [duplicate]
... don't really follow the explanation of why to not use private methods - I mean the exact same argument could be made in Java and Co, but so far java programs still work although they use lots of private methods (which can't be used by subclasses)
– Voo
Aug 3 '...
Android ListView with different layouts for each row
...ewHolder. It would increase speed because you won't have to call findViewById() every time in getView method. See List14 in API demos.
Create one generic layout that will conform all combinations of properties and hide some elements if current position doesn't have it.
I hope that will help you. I...