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NoSQL - MongoDB vs CouchDB [closed]
...u wanted CouchDB, but your data changes too much, filling up disks.
For example: For most things that you would do with MySQL or PostgreSQL, but having predefined columns really holds you back.
CouchDB (1.2)
Written in: Erlang
Main point: DB consistency, ease of use
License: Apache
Protocol: HTT...
What is the difference between float and double?
...i.e. using one or the other does not seem to affect the results. Is this really the case? When are floats and doubles interchangeable? What are the differences between them?
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How can I detect if a browser is blocking a popup?
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I tried a number of the examples above, but I could not get them to work with Chrome. This simple approach seems to work with Chrome 39, Firefox 34, Safari 5.1.7, and IE 11. Here is the snippet of code from our JS library.
openPopUp: function(urlToOp...
Cannot create an NSPersistentStoreCoordinator with a nil model
... model name.
Changed it and it worked straight away.....
Thanks to Rock & Muller for contributing.......you saved me days!!
Gaz.
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Directory-tree listing in Python
How do I get a list of all files (and directories) in a given directory in Python?
20 Answers
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Compare two objects and find the differences [duplicate]
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One Flexible solution: You could use reflection to enumerate through all of the properties and determine which are and are not equal, then return some list of properties and both differing values.
Here's an example of some code that is a good start for what you are asking. It only looks at F...
What is the dual table in Oracle?
...of dummy table with a single record used for selecting when you're not actually interested in the data, but instead want the results of some system function in a select statement:
e.g. select sysdate from dual;
See http://www.adp-gmbh.ch/ora/misc/dual.html
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How many GCC optimization levels are there?
...llect2 and cc1 take -O, so let's focus on them.
And:
gcc -v -O100 main.c |& grep 100
gives:
COLLECT_GCC_OPTIONS='-O100' '-v' '-mtune=generic' '-march=x86-64'
/usr/local/libexec/gcc/x86_64-unknown-linux-gnu/5.1.0/cc1 [[noise]] hello_world.c -O100 -o /tmp/ccetECB5.
so -O was forwarded to both cc...
How to check whether a file or directory exists?
...easily:
path := GetSomePath();
if stat, err := os.Stat(path); err == nil && stat.IsDir() {
// path is a directory
}
Part of my problem was that I expected path/filepath package to contain the isDir() function.
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Bash tool to get nth line from a file
...d' file
Where NUM is the number of the line you want to print; so, for example, sed '10q;d' file to print the 10th line of file.
Explanation:
NUMq will quit immediately when the line number is NUM.
d will delete the line instead of printing it; this is inhibited on the last line because the q c...