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How to add row in JTable?
...);
model.addColumn("Col2");
// Append a row
model.addRow(new Object[]{"v1", "v2"});
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undefined method `source_index' for Gem:Module (NoMethodError)
...5 had installed RubyGems version 2.0.2 for me, and 1.9.3-p327 has RubyGems v1.8.23 installed.
Gem.source_index has been deprecated for a while, but since Rails 2.3 is not getting any updates except critical security patches, this will never get fixed. RubyGems v2.0 finally removed that method. Down...
Is there a “goto” statement in bash?
...}
start=${1:-"start"}
jumpto $start
start:
# your script goes here...
x=100
jumpto foo
mid:
x=101
echo "This is not printed!"
foo:
x=${x:-10}
echo x is $x
results in:
$ ./test.sh
x is 100
$ ./test.sh foo
x is 10
$ ./test.sh mid
This is not printed!
x is 101
...
Relative frequencies / proportions with dplyr
..., gear) %>%
summarise (n=n()) %>%
mutate(rel.freq = paste0(round(100 * n/sum(n), 0), "%"))
## am gear n rel.freq
## 1 0 3 15 79%
## 2 0 4 4 21%
## 3 1 4 8 62%
## 4 1 5 5 38%
EDIT Because Spacedman asked for it :-)
as.rel_freq <- function(x, ...
What is content-type and datatype in an AJAX request?
...tion/json and dataType to be text:
$.ajax({
type : "POST",
url : /v1/user,
dataType : "text",
contentType: "application/json",
data : dataAttribute,
success : function() {
},
error : function(error) {
}
});
...
How to change the default GCC compiler in Ubuntu?
...ll g++-4.5
update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.6 100
update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.5 50
update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.6 100
update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.5 50
update-alternatives...
远程临场机器人 你会买单吗？ - 资讯 - 清泛网 - 专注C/C++及内核技术
...明机器人是由远处的用户来进行设备的操控，并实现场景位置的移动。远方的人不再看对方希望你看到的场景，而是能够实现视角的自主变换。
“我们这个概念是从1943年美国的科幻小说来的，后来思科给它取来名字叫远程临场...
When to use enumerateObjectsUsingBlock vs. for
...lock is consistently 700% slower than for-in (based on 1mm iterations of a 100 item array).
Is performance a real practical concern here?
Definitely not, with rare exception.
The point is to demonstrate that there is little benefit to using enumerateObjectsUsingBlock: over for-in without a really...
Constants in Objective-C
...nit including the header file will get its own static variable, so you get 100 of them if you include the header from 100 .m files.
– gnasher729
Apr 14 '14 at 10:55
...
How to make an empty div take space
...t will be 1 px, if you want default height you can simply say min-height = 100px and min width = 100px, the div will always be 100x100 no way it will be 0
– Engineeroholic
Oct 24 '16 at 22:37
...