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Compare integer in bash, unary operator expected
...ces! The shell will replace $i as follows:
if [ -ge 2 ] ; then ...
Now that variable substitutions are done, the shell proceeds with the comparison and.... fails because it cannot see anything intelligible to the left of -gt. However, quoting $i:
if [ "$i" -ge 2 ] ; then ...
becomes:
if...
Can I get “&&” or “-and” to work in PowerShell?
...:
build
if ($?) {
run_tests
}
2019/11/27: The &&operator is now available for PowerShell 7 Preview 5+:
PS > echo "Hello!" && echo "World!"
Hello!
World!
share
|
improve ...
Android Reading from an Input stream efficiently
....readLine()) != null; ) {
total.append(line).append('\n');
}
You can now use total without converting it to String, but if you need the result as a String, simply add:
String result = total.toString();
I'll try to explain it better...
a += b (or a = a + b), where a and b are Strings, copie...
SQL - The conversion of a varchar data type to a datetime data type resulted in an out-of-range valu
...ormatting the date to build the SQL statement. I had used Format(DateTime.Now, "yyyymmdd") when it should have been Format(DateTime.Now, "yyyyMMdd")
– Jay Imerman
Jan 12 '17 at 14:43
...
How to use a class from one C# project with another C# project
...is select the solution file, right click --> Add --> New Project)
I now have two project in the same solution
Step3:
As Paul Ruane stated. go to references in the solution explorer (if closed it's in the view tab of the compiler). DoubleProjectTwo is the one needing functions/methods of Dou...
In JavaScript, why is “0” equal to false, but when tested by 'if' it is not false by itself?
...
From now on, if someone says that he never uses strict comparison operators, I will face him with these tables and make him cry. Still not sure if I grasp the concept of NaN though. I mean, typeof NaN // number but NaN === NaN //...
Running multiple AsyncTasks at the same time — not possible?
...llel computations for a bunch of AsyncTasks. But later they fixed that and now the size is 5, so at most 5 AsyncTasks can run simultaneously. Unfortunately I don't remember in what version exactly they changed that.
UPDATE:
Here is what current (2012-01-27) API says on this:
When first introdu...
std::string to float or double
...
It's great to know that the C++ standards committee added this. ostringstream in itself was simply too long to type out, let alone use ..
– bobobobo
Jan 23 '14 at 17:41
...
How do I check if a string contains another string in Objective-C?
... contain the "needle".
And if you're on iOS 8 or OS X Yosemite, you can now do: (*NOTE: This WILL crash your app if this code is called on an iOS7 device).
NSString *string = @"hello bla blah";
if ([string containsString:@"bla"]) {
NSLog(@"string contains bla!");
} else {
NSLog(@"string does...
How do JavaScript closures work?
How would you explain JavaScript closures to someone with a knowledge of the concepts they consist of (for example functions, variables and the like), but does not understand closures themselves?
...