tenable lce

considered equal, how to make the input of the space is not equal? We can add a double quote on the comparison character. @echo off set/p var= Enter the first comparison character: set/p var2= Please enter the second comparison character (try the Extra space): if "%var%" = "%var2%" (echo US equals) ELSE Ech o We are not equal pause Third usage: IF [NOT] EXIST filename command This is the syntax to determine whether a file or folder exists Example @echo off if exist "C:\Te

their designs are good or bad and subconsciously protect their designs. If there is no good judgment ability, when their design is criticized, some people will not listen to, some people will become lost. And the most frightening situation is that we all feel that we have done a good job, such as the launch of the market after the discovery of the not also. To form a good judgment ability is not overnight, more reading more to see the cow's point of view is helpful, but directly from other peo

(S1 //false:s2 less than S1{cout"S1 "Endl; } Else{cout"S1 > S2"Endl; } //compare directly with C-style strings Const CharCa1[] ="A String Example"; Const CharCa2[] ="A Different string"; //if (CA1 //The result of this comparison is undefined, because the content of the comparison is the value of two pointers if(strcmp (CA1, Ca2))//such a notation would make the result compare to the string object. {cout"S1 "Endl; } Else{cout"S1 > S2"Endl; } stringLARGESTR = S1 +" "+S2; //th

, LSP): All references to the base class (parent class) must be able to transparently use objects of its subclasses. The principle of substitution on the Richter scale tells us that in a software system, subclasses should be able to replace any base class where it can appear, and that the code will work properly after being replaced. Subclasses can also add new behavior based on the base class. For example, there are two classes, one class is BaseClass, the other is the subclass class, and the

not be judged. Because it follows a left-to-right count. This is the use of and.Use of ORor meaning in Chinese, that is to say, when two conditions, one result is true, then the judgment display is true. To illustrate:Here you can see. Condition 1 in 9 is greater than 2, or 5 is less than 2. It is obvious that this 9 is greater than 2. It's true. The corresponding explanation is that when the first condition is judged to be true, no second judgment is made, so it is true, the second condition,

container, such as a DIV element with a scrollbar. All you have to do is define the container as a JQuery object and upload it as a parameter to the initialization method. This is a horizontal scrolling demo page and a vertical scrolling demo page. #container {height: overflow: ; $("Img.lazy"). Lazyload({container: $("#container")}); When pictures are not arranged in orderWhen scrolling through a page, the Lazy load loops i

Rownum=1 as a condition. But to find the second student in the student table, the data is not available using the rownum=2 results. Since rownum are all starting from 1, but more than 1 of the natural numbers in rownum do equal to the judgment is considered false condition, so can not find rownum = N (n>1 natural number). Sql> Select Rownum,id,name from student where rownum=1; (You can use a limit to return the number of records to ensure no errors, such as: implicit cursors) Sql> Select Rownum

object is evaluated. For example, suppose ival is an int object: if (ival)//Evaluate ival as a condition // .... The preceding statement ival as a conditional expression for an if statement. If the ival is not a 0 value, if condition is set, otherwise the condition is not tenable. For an expression containing an operator, its value is obtained by specifying the operand. In addition to special usages, the result of an expression is a right value th

common algorithm, this is because it is simple and easy, the construction of greedy strategy is not very difficult. Unfortunately, it needs to be proved before it can really apply to the algorithm of the problem. In general, the proof of the greedy algorithm revolves around: the optimal solution of the whole problem must be derived from the optimal solution of the sub problem in the greedy strategy. For the example of the 3 greedy strategies are not tenable