python assert

Yesterday in the view of the NIO source code, see such a sentence, immediately confused forced:ASSERT (i >= 0);Assert keyword I have an image, Chinese is called assertion. But has never been to understand its function, today in the cold to take time, put my summary of the code out:1. The JVM turns off assert by default and can be opened by the-ea command(1) The Java command turns on assertJava-ea $classname

Original: http://www.cnblogs.com/ggzss/archive/2011/08/18/2145017.htmlThe prototype of an Assert macro is defined in #include void assert (int expression);The function of an assert is to evaluate expression expressions, if the value is False (that is, 0), then it prints an error message to stderr and then terminates the program by calling abort. Take a look at th

Http://bdn.borland.com/article/0,1410,28432,00.htmlAbstract: The assert () call allows you to test problems in the code, but it has some limitations. This article describes an improved assert call.Improved C ++ Builder assert ()As part of good programming, assertions in your code are a simple way to monitor what is happening. This article discusses how to increas

Assert. h is the header file in the C standard function library. The assert () macro is defined for program debugging.In the C standard function library, it is a very special header file. You can introduce it several times for different effects. This effect depends on whether NDEBUG is defined during the introduction.MacroAssert () is a diagnostic macro used to dynamically identify logical error conditions

The usage of assert in Java and Javaassert1. assert booleanExpression; if it is true, the program continues to execute; otherwise, a java. lang. AssertionError is thrown and the program is terminated.2. assert booleanExpression: errorMessage; if it is true, the program continues to execute; otherwise, a java. lang. AssertionError is thrown, and the error message

The prototype of an Assert macro is defined in assert.h > voidint expression);　　the function of an assert is to evaluate expression expressions, if the value is False (that is, 0), then it prints an error message to stderr and then terminates the program by calling abort. Take a look at the following program listing BADPTR.C:#includestdio.h>#includeassert.h>#includestdlib.h>intMain (void) {FILE*FP; FP=fo

I. Use of assert class 1. The namespace of the assert class is Microsoft. visualstudio. testtools. unittesting. You only need to reference Microsoft. visualstudio. qualitytools. unittestframework. dll in the project file. 2. The assert class can be used to verify specific functions. The unit test method executes the method code in the development code, but only w

1, the Assert macro prototype is defined in #include void assert (int expression);The function of an assert is to evaluate expression expressions, if the value is False (that is, 0), then it prints an error message to stderr and then terminates the program by calling abort.2. The disadvantage of using assert is that fr

Self-implemented asset (asset) Program 1. Overview Many textbooks are called error-Proof Design for programmers during programming. In fact, this is also necessary. The error prevention design can effectively capture the invalid and error status when the program is running, so that the programmer can quickly locate the error message for further processing. It is hard to imagine how terrible a system of a certain scale is to have no mistake-proof design. There is a classic saying: Don't know,

Label: C ++ macro Program code: #include Note: 1. The assert () macro uses the _ line _ and _ file _ macros to determine the number of lines of the error code and the file where the error code is located. 2. The forward slash "\" at the end of the line connects the Statement of the line with the following one sentence. 3. The # X: # Operator quotes any character after it. Here is "X ". 4. debug is the debugging switch. Gen

is very common, but it is not a good idea to manually write the detection logic in each method. Read the spring source code and you will find that spring uses an org. springframework. util. Assert generic class to complete this task. Assert is translated as an "assertion" in Chinese. readers who have used JUnit are familiar with this concept. It determines that a certain actual running value is the same a

One. OverviewAssert: Represents an assertionTwo. GrammarIn Java, the Assert keyword was introduced from Java SE 1.4, in order to avoid using the Assert keyword in the old version of Java code to cause an error, Java does not start the assertion check by default (at this point, all assertion statements will be ignored!). ), if you want to turn on assertion checking, you need to turn on the switch-enableasser

This article mainly introduces the console in JavaScript. introduction to The assert () function. The assert () function is an asserted tool function that is frequently used in Debugging. if you need it, refer to the development and maintenance process of JavaScript programs, assert is a good feature for ensuring program correctness. In browsers with debugging to

preceding detection method input parameters is very common, but it is not a good idea to manually write the detection logic in each method. Read the spring source code and you will find that spring uses an org. springframework. util. Assert generic class to complete this task. Assert is translated as an "assertion" in Chinese. readers who have used JUnit are familiar with this concept. It determines that

The prototype of an Assert macro is defined in assert.h > void int expression);The function of an assert is to evaluate expression expressions, if the value is False (that is, 0), then it prints an error message to stderr and then terminates the program by calling abort. Take a look at the following program listing BADPTR.C:#include [Email protected] error_process]# gcc badptr.c[Email protected] error_pr

(i) First clear: The Java assertion assert is introduced by jdk1.4. The JVM assertion is closed by default. Assertions can be locally opened, such as when the parent class prohibits assertions, and subclasses open assertions, so it is generally said that "assertions are not inheritable." Assertions apply only to complex debugging processes. Assertions are generally used to determine the results of program execution, and do not let assertions handle bu

Town Field Poem:Cheng listens to the Tathagata language, the world name and benefit of Dayton. Be willing to do the Tibetan apostles, the broad show is by Sanfu mention.I would like to do what I learned, to achieve a conscience blog. May all the Yimeimei, reproduce the wisdom of the body.——————————————————————————————————————————CodeData=int (Input (' Enter an integer: ')) asserts the data >= 0 #当data小于0时, triggering this exception if the Result x 2:============= restart:c:/users/administra

The two modules to be introduced today are assert and VM. Next we will introduce them separately. 　　Use assert for testing Node, we can use the assert module to test the code. Equal () and notequal () are used to determine equality and inequality respectively. The first parameter is the expected value, the second parameter is the real value, and the third paramet

Assert () and panic ()Let's first look at assert (). You may have been using this function for a long time, but previously you used a ready-made assert, which can be easily used as long as it contains a header file. Now everything has to be self-reliant, but don't worry, it is not difficult to write an Assert function.

Assertion, used for debugging errors. It is found during debugging and then tracked for errors! What are the security requirements of this code when writing a program for others? Intuitively, we all know that the program should not crash. However, if a C/C ++ program exposes the header file containing the API, it cannot guarantee this. Often, if a C/C ++ program is provided to others using header files, its security guarantee should be "It will not crash when it is used correctly, the failure oc