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Is optimisation level -O3 dangerous in g++?
...from a colleague of mine), that compiling with an optimisation level of -O3 in g++ is somehow 'dangerous', and should be avoided in general unless proven to be necessary.
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Implementing two interfaces in a class with same method. Which interface method is overridden?
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348
+100
If a t...
Difference between VARCHAR and TEXT in MySQL [duplicate]
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TL;DR
TEXT
fixed max size of 65535 characters (you cannot limit the max size)
takes 2 + c bytes of disk space, where c is the length of the stored string.
cannot be (fully) part of an index. One would need to specify a prefix length.
VARCHAR(M)
variable...
How can I keep Bootstrap popovers alive while being hovered?
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173
Test with code snippet below:
Small modification (From the solution provided by vikas) to suit m...
Determine if Python is running inside virtualenv
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233
The most reliable way to check for this is to check whether sys.prefix == sys.base_prefix. If t...
Force Intellij IDEA to reread all maven dependencies
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357
Press Ctrl+Shift+A to find actions, and input "reimport", you will find the "Reimport All Mave...
Google Play Services Library update and missing symbol @integer/google_play_services_version
...he latest version of Google Play Services ( v4.0, released on Halloween 2013 ), you are now supposed to add a new tag into the AndroidManifest.xml file.
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Reading from text file until EOF repeats last line [duplicate]
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Just follow closely the chain of events.
Grab 10
Grab 20
Grab 30
Grab EOF
Look at the second-to-last iteration. You grabbed 30, then carried on to check for EOF. You haven't reached EOF because the EOF mark hasn't been read yet ("binarically" speaking, its conceptual location is jus...
Map enum in JPA with fixed values?
...alizable {
public enum Right {
READ(100), WRITE(200), EDITOR (300);
private int value;
Right(int value) { this.value = value; }
public int getValue() { return value; }
public static Right parse(int id) {
Right right = null; // Default
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How to check a radio button with jQuery?
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