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Shell script while read line loop stops after the first line
...ly, a workaround which isn't specific to ssh is to redirect standard input for any command which might otherwise consume the while loop's input.
while read -r LINE; do
let count++
echo "$count $LINE"
sh ./do_work.sh "$LINE" </dev/null
done < "$FILENAME"
The addition of </dev/nul...
How do I loop through or enumerate a JavaScript object?
...
You can use the for-in loop as shown by others. However, you also have to make sure that the key you get is an actual property of an object, and doesn't come from the prototype.
Here is the snippet:
var p = {
"p1": "value1",
"...
How to add title to subplots in Matplotlib?
...
For anyone having problems with the font size for a histogram, oddly enough reducing the number of bins let me increase it. Went from 500 to 100.
– mLstudent33
Feb 19 at 8:56
...
How to parse JSON in Scala using standard Scala classes?
... "completeness": 0.9
}]
}
""".stripMargin
val result = for {
Some(M(map)) <- List(JSON.parseFull(jsonString))
L(languages) = map("languages")
M(language) <- languages
S(name) = language("name")
B(active) = language("is_active")
D(completeness) = lang...
Which is faster : if (bool) or if(int)?
...helps to illuminate that when choosing a variable type, you're choosing it for two potentially competing purposes, storage space vs. computational performance.
– Triynko
Apr 27 '11 at 18:20
...
Execution time of C program
...which could be anywhere from 1 second to several minutes). I have searched for answers, but they all seem to suggest using the clock() function, which then involves calculating the number of clocks the program took divided by the Clocks_per_second value.
...
Double Negation in C++
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@lzprgmr: explicit cast causes a "performance warning" on MSVC. Using !! or !=0 solves the problem, and among the two I find the former cleaner (since it will work on a greater amount of types). Also I agree that there is no reason to use either in the code in q...
Python exit commands - why so many and when should each be used?
...
Let me give some information on them:
quit() simply raises the SystemExit exception.
Furthermore, if you print it, it will give a message:
>>> print (quit)
Use quit() or Ctrl-Z plus Return to exit
>>>
This functionalit...
解决：Run-Time Check Failure #0，The value of ESP was not properly sav...
...就可以在定义该函数的时候加上一句话，
FAR PASCAL 或者 __stdcall 这个就OK了。
具体做法：
比如说你要定义一个 返回类型为空，参数为空的函数指针：
typedef void （*LPFUN）（void）;
这样确实跟我们dll里的函数匹配了，上面也说...
How to “properly” create a custom object in JavaScript?
...
There are two models for implementing classes and instances in JavaScript: the prototyping way, and the closure way. Both have advantages and drawbacks, and there are plenty of extended variations. Many programmers and libraries have different ap...