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Confused by python file mode “w+”
...e with a with statement like you should be. Then you'd do something like this to read from your file:
with open('somefile.txt', 'w+') as f:
# Note that f has now been truncated to 0 bytes, so you'll only
# be able to read data that you write after this point
f.write('somedata\n')
f....
What are the best practices for using a GUID as a primary key, specifically regarding performance?
...UID as the Primary Key in almost all tables and I have read that there are issues about performance when using GUID as Primary Key. Honestly, I haven't seen any problem, but I'm about to start a new application and I still want to use the GUIDs as the Primary Keys, but I was thinking of using a Comp...
What's the right way to pass form element state to sibling/parent elements?
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So, if I'm understanding you correctly, your first solution is suggesting that you're keeping state in your root component? I can't speak for the creators of React, but generally, I find this to be a proper solution.
Maintaining state is one of the reasons (at least I think) that Re...
How is the default max Java heap size determined?
...+PrintFlagsFinal -version | grep HeapSize
I believe the resulting output is in bytes.
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Batch file to delete files older than N days
...and others that required installing extra command line utilities to accomplish the task.
23 Answers
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Is #pragma once part of the C++11 standard?
...e standard and portable way to avoid multiple header inclusions in C++ was/is to use the #ifndef - #define - #endif pre-compiler directives scheme also called macro-guard scheme (see code snippet below).
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Moment.js transform to date object
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Use this to transform a moment object into a date object:
From http://momentjs.com/docs/#/displaying/as-javascript-date/
moment().toDate();
Yields:
Tue Nov 04 2014 14:04:01 GMT-0600 (CST)
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Get to UIViewController from UIView?
Is there a built-in way to get from a UIView to its UIViewController ? I know you can get from UIViewController to its UIView via [self view] but I was wondering if there is a reverse reference?
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How do I get a Date without time in Java?
...o such concept as "just a date", Joda Time does have a type representing this (LocalDate). Your code will be much clearer if you're able to use types which represent what you're actually trying to do.
There are many, many other reasons to use Joda Time or java.time instead of the built-in java.util...
Make xargs execute the command once for each line of input
...e command exactly once for each line of input given?
It's default behavior is to chunk the lines and execute the command once, passing multiple lines to each instance.
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