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Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java?
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When you compile a number literal in Java and assign it to a Integer (capital I) the compiler emits:
Integer b2 =Integer.valueOf(127)
This line of code is also generated when you use autoboxing.
valueOf is implemented such that certain numbers are "pooled", and i...
What is the purpose of wrapping whole Javascript files in anonymous functions like “(function(){ … }
I have been reading a lot of Javascript lately and I have been noticing that the whole file is wrapped like the following in the .js files to be imported.
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Export Data from mysql Workbench 6.0
...own variable 'delayed-insert=FALSE'
This error occurs on various systems and can be temporarily fixed by:
Going to the appropriate directory depending on the system:
a) Windows: C:\Program Files\MySQL\MySQL Workbench 6.3 CE\modules (32-bit installation on x64 systems: C:\Program Files (x86)\MyS...
Suppressing “is never used” and “is never assigned to” warnings in C#
...g restore 0169
To suppress warnings for "Field XYZ is never assigned to, and will always have its default value XX", you do this:
#pragma warning disable 0649
... field declaration
#pragma warning restore 0649
To find such warning numbers yourself (ie. how did I know to use 0169 and 0649), you ...
How do I Sort a Multidimensional Array in PHP [duplicate]
...a loaded into a multidimensional array. In this way each "row" is a record and each "column" contains the same type of data. I am using the function below to load my CSV file.
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Explain the “setUp” and “tearDown” Python methods used in test cases
Can anyone explain the use of Python's setUp and tearDown methods while writing test cases apart from that setUp is called immediately before calling the test method and tearDown is called immediately after it has been called?
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java.lang.UnsupportedClassVersionError Unsupported major.minor version 51.0 [duplicate]
...ortedClassVersionError happens because of a higher JDK during compile time and lower JDK during runtime.
Here's the list of versions:
Java SE 9 = 53,
Java SE 8 = 52,
Java SE 7 = 51,
Java SE 6.0 = 50,
Java SE 5.0 = 49,
JDK 1.4 = 48,
JDK 1.3 = 47,
JDK 1.2 = 46,
JDK 1.1 = 45
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How to check if a string contains a substring in Bash
... that spaces in the needle string need to be placed between double quotes, and the * wildcards should be outside. Also note that a simple comparison operator is used (i.e. ==), not the regex operator =~.
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How does git compute file hashes?
... | shasum
8ab686eafeb1f44702738c8b0f24f2567c36da6d
Source: http://alblue.bandlem.com/2011/08/git-tip-of-week-objects.html
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What are transparent comparators?
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What problem does this solve,
See Dietmar's answer and remyabel's answer.
and does this change how standard containers work?
No, not by default.
The new member function template overloads of find etc. allow you to use a type that is comparable with the container's key,...