Posts Tagged Invocare
How to: Define Delegates in VB.NET
Posted by marius.popa in VB.NET on March 16, 2010
The delegate is a pointer that allows the call of a function indirectly through its memory address. The delegate is used to call methods of other objects. It is similar to the function pointer used in other programming languages. The difference is that the delegate is a reference type on System.Delegate class.
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Mecanisme de transfer a argumentelor unei proceduri in VB.NET
Posted by marius.popa in VB.NET on June 26, 2009
O procedura [...] este invocata, apelata, intr-un context dat. Procedura executa secventa de cod sursa in mod repetat, utilizand date diferite la fiecare invocare a sa. Datele utilizate sunt reprezentate de variabile [...], constante si expresii transferate in procedura.
Parametrul reprezinta o valoare pe care procedura o asteapta la momentul invocarii. Definirea unei proceduri presupune si eventuala definire a listei de parametri.
Argumentul reprezinta valoarea furnizata parametrului procedurii la momentul invocarii acesteia. Argumentele reprezinta elemente cu valori diferite pentru invocari diferite ale procedurii.
Definirea procedurilor de tip proprietate in VB.NET
Posted by marius.popa in VB.NET on June 25, 2009
Definirea procedurilor in VB.NET
Posted by marius.popa in VB.NET on June 22, 2009
Procedura reprezinta un bloc de specificatii VB.NET incluse intr-o declaratie precum: Function, Sub, Operator, Get si Set. Toate specificatiile executabile VB.NET sunt incluse intr-o procedura.
Invocarea unei proceduri este cunoscuta si sub denumirea de apel de procedura si reprezinta momentul lansarii in executie a specificatiilor incluse in respectiva procedura. La sfarsitul executiei codului din procedura, controlul executiei se preda codului in punctul in care procedura a fost invocata.
Definirea delegatilor in VB.NET
Posted by marius.popa in VB.NET on June 9, 2009
Delegatul este un pointer care permite apelul unei functii in mod indirect prin intermediul adresei de memorie a acesteia. Delegatul este utilizat pentru a apela metode ale altor obiecte. Este similar pointerului de functie utilizat in alte limbaje de programare. Diferenta consta in faptul ca delegatul este un tip referinta pe baza clasei System.Delegate.
Delegatii sunt folositori in situatiile in care aparitia unui eveniment determina apelul de handler-i de eveniment diferiti, in functie de contextul aparitiei evenimentului. Acest lucru impune asocierea dinamica a evenimentelor cu handler-ii de evenimente, fiind utilizati delegatii in acest scop.
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YAHOO TECH NEWS- Smooth-talking hackers test hi-tech titans' skills
(AFP)AFP - Hackers at an infamous DefCon gathering are proving that old-fashioned smooth talk rivals slick software skills when it comes to pulling off attacks on computer networks. […]
- BlackBerry maker to launch tablet in November: report
(Reuters)Reuters - Research In Motion will introduce a tablet computer in November to compete with Apple Inc's iPad, Bloomberg News reported on Friday, citing two people familiar with the company's plans. […]
- Kindle's E-Reader Price War: Who'll Blink First?
(PC World)PC World - When, oh when, will the price-cutting end? Now that Amazon has stunned the e-book world by dropping the price of its Kindle e-reader (well, the new Wi-Fi-only model) to $139, will competitors Barnes & Noble, Borders, and Sony do the same? […]
- Smooth-talking hackers test hi-tech titans' skills
(AFP)
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