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What are the uses of the exec command in shell scripts? [closed]
Can anyone explain what are the uses of the exec command in shell scripting with simple examples?
2 Answers
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How to check if a folder exists
I am playing a bit with the new Java 7 IO features, actually I trying to receive all the xml files of a folder. But this throws an exception when the folder does not exist, how can I check if the folder exists with the new IO?
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It is more efficient to use if-return-return or if-else-return?
Suppose I have an if statement with a return . From the efficiency perspective, should I use
8 Answers
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What is the difference between Sublime text and Github's Atom [closed]
Github announced Atom which is very similar to Sublime. Even some keyboard shortcuts like ⌘ + P , ⌘ + Shift + P etc. are same.
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How to put multiple statements in one line?
I wasn't sure under what title to ponder this question exactly, coding golf seems appropriate if a bit unspecific.
10 Answe...
Is the != check thread safe?
I know that compound operations such as i++ are not thread safe as they involve multiple operations.
8 Answers
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Chain-calling parent initialisers in python [duplicate]
Consider this - a base class A, class B inheriting from A, class C inheriting from B. What is a generic way to call a parent class initialiser in an initialiser? If this still sounds too vague, here's some code.
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App Inventor 2开发简单计算器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...他算符兼具等号的功能，我们称后面的算符为等号算符；C：英文CLEAR的缩写，用于清除计算过程中的全部信息；CE：英文CLEAR ENTRY的缩写，用于清除在算符之后输入的所有数字——后数；←（回退）：用于从尾部清除后数中的一...
Designing function f(f(n)) == -n
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Do try/catch blocks hurt performance when exceptions are not thrown?
During a code review with a Microsoft employee we came across a large section of code inside a try{} block. She and an IT representative suggested this can have effects on performance of the code. In fact, they suggested most of the code should be outside of try/catch blocks, and that only importa...