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What is the advantage of GCC's __builtin_expect in if else statements?
...e the assembly code that would be generated from:
if (__builtin_expect(x, 0)) {
foo();
...
} else {
bar();
...
}
I guess it should be something like:
cmp $x, 0
jne _foo
_bar:
call bar
...
jmp after_if
_foo:
call foo
...
after_if:
You can see that the instr...
How can I pad an int with leading zeros when using cout
...to output an int with leading zeros, so the value 1 would be printed as 001 and the value 25 printed as 025 . How can I do this?
...
Pickle or json?
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edited Sep 30 '18 at 16:41
Daniel Heilper
1,00611 gold badge1515 silver badges3131 bronze badges
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HTML5 Number Input - Always show 2 decimal places
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step='0.01' does not work for me on Chrome 66.0 parseFloat works like a charm. robot_speed = parseFloat(robot_speed).toFixed(2)
– 05032 Mendicant Bias
Aug 14 '19 at 14:52
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Priority queue in .Net [closed]
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edited May 27 '19 at 20:10
BartoszKP
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ans...
How to use arguments from previous command?
...
By the way, you could have put the echo on the line by selecting argument 0:
Press Alt-0 Alt-Ctrl-y
Edit:
To answer the question you added to your original:
You can press Alt-0 then repeatedly press Alt-. to step through the previous commands (arg 0). Similarly Alt-- then repeating Alt-. would ...
How to check if a variable is an integer in JavaScript?
...the === operator (strict equality) as below,
if (data === parseInt(data, 10))
alert("data is integer")
else
alert("data is not an integer")
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Finding out whether a string is numeric or not
...ts].location == NSNotFound)
{
// newString consists only of the digits 0 through 9
}
See +[NSCharacterSet decimalDigitCharacterSet] and -[NSString rangeOfCharacterFromSet:].
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improve th...
Static function variables in Swift
...unc foo() -> Int {
struct Holder {
static var timesCalled = 0
}
Holder.timesCalled += 1
return Holder.timesCalled
}
7> foo()
$R0: Int = 1
8> foo()
$R1: Int = 2
9> foo()
$R2: Int = 3
...
How do I check the difference, in seconds, between two dates?
...tes, use total_seconds like this:
import datetime as dt
a = dt.datetime(2013,12,30,23,59,59)
b = dt.datetime(2013,12,31,23,59,59)
(b-a).total_seconds()
86400.0
#note that seconds doesn't give you what you want:
(b-a).seconds
0
...