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Subprocess changing directory
...h as subprocess.call(['ls', '-l'], cwd='/'). This changes the cwd to / and then runs ls with -l as argument. But if I want to do os.chdir('/') and then open('etc/fstab', 'r'), I cannot replace os.chdir() with anything about subprocess.XXX(cwd='/') as it won't help, as said. These are two complete di...
Iterate over each line in a string in PHP
...
If you check the memory usage while the app is running, then you'll see the magic. It actually pulls the file you're reading into memory in the event you loop through each of the lines, and it keeps your token location. You'll want to flush that to be truly memory efficient. php.n...
How do I prevent an Android device from going to sleep programmatically?
...going to sleep" only refers to the screen (and not keeping the CPU active) then a wake lock is probably more than you need.
You also need to be sure you have the WAKE_LOCK permission set in your manifest in order to use this method.
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Stack Memory vs Heap Memory [duplicate]
...ck is very much like the std::stack class: you push parameters onto it and then call a function. The function then knows that the parameters it expects can be found on the end of the stack. Likewise, the function can push locals onto the stack and pop them off it before returning from the function. ...
Form inside a table
...have part of a table inside a form.
Use one form around the entire table. Then either use the clicked submit button to determine which row to process (to be quick) or process every row (allowing bulk updates).
HTML 5 introduces the form attribute. This allows you to provide one form per row outsid...
IN clause and placeholders
... (because it is a restricted form that does not contain external data) and then the placeholders can be used as normal.
Consider a function String makePlaceholders(int len) which returns len question-marks separated with commas, then:
String[] names = { "name1", "name2" }; // do whatever is needed...
What is a stream?
...holds an internal buffer. Reads come from the buffer, and if you push back then data is placed in the buffer. If there's nothing in the buffer then the push back stream reads from the real stream. This is a simple example of a "stream adaptor": it sits on the "end" of an input stream, it is an input...
jQuery Validate Plugin - How to create a simple custom rule?
...parseFloat(value) > 0);
}, "* Amount must be greater than zero");
And then applying this like so:
$('validatorElement').validate({
rules : {
amount : { greaterThanZero : true }
}
});
Just change the contents of the 'addMethod' to validate your checkboxes.
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Find duplicate lines in a file and count how many time each line was duplicated?
...ing over dups array with num as variable and print the saved numbers first then their number of duplicated value by dups[num].
Note that your input file has spaces on end of some lines, if you clear up those, you can use $0 in place of $1 in command above :)
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Elastic Search: how to see the indexed data
... doing:
cd elasticsearch/
./bin/plugin -install mobz/elasticsearch-head
Then (assuming ElasticSearch is already running on your local machine), open a browser window to:
http://localhost:9200/_plugin/head/
Alternatively, you can just use curl from the command line, eg:
Check the mapping f...