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Count number of occurences for each unique value
...;% summarize(count=n())
It uses the pipe operator %>% to chain method calls on the data frame data.
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Using `textField:shouldChangeCharactersInRange:`, how do I get the text including the current typed
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-shouldChangeCharactersInRange gets called before text field actually changes its text, that's why you're getting old text value. To get the text after update use:
[textField2 setText:[textField1.text stringByReplacingCharactersInRange:range withString:string]...
Locate current file in IntelliJ
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In the keymap it's called "Select in..." now.
– seanmcl
Oct 13 '14 at 15:02
3
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I get exception when using Thread.sleep(x) or wait()
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As other users have said you should surround your call with a try{...} catch{...} block. But since Java 1.5 was released, there is TimeUnit class which do the same as Thread.sleep(millis) but is more convenient.
You can pick time unit for sleep operation.
try {
TimeUnit...
How to create and use resources in .NET
...? Well, lucky us, C# makes this exceedingly easy.
There is a static class called Properties.Resources that gives you access to all your resources, so my code ended up being as simple as:
paused = !paused;
if (paused)
notifyIcon.Icon = Properties.Resources.RedIcon;
else
notifyIcon.Icon = Pr...
Lists: Count vs Count() [duplicate]
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@BFree, How we can call this in VB.NET ?
– kbvishnu
Nov 15 '13 at 10:57
8
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Get the first key name of a javascript object [duplicate]
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There's no such thing as the "first" key in a hash (Javascript calls them objects). They are fundamentally unordered. Do you mean just choose any single key:
for (var k in ahash) {
break
}
// k is a key in ahash.
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Clear icon inside input text
...ion 1 - Always display the 'x': (example here)
Array.prototype.forEach.call(document.querySelectorAll('.clearable-input>[data-clear-input]'), function(el) {
el.addEventListener('click', function(e) {
e.target.previousElementSibling.value = '';
});
});
.clearable-input {
position: r...
Get the (last part of) current directory name in C#
...I like this better than the chosen answer. (Ab)using GetFileName is semantically wrong since it's a directory you're trying to retrieve. Also, to make GetFileName deterministic means you have to account for the possibility of a trailing forward slash or backslash, and trim it off, which is ugly.
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What does “export” do in shell programming? [duplicate]
...p '^variable='
$ # No environment variable called variable
$ variable=Hello # Create local (non-exported) variable with value
$ env | grep '^variable='
$ # Still no environment variable called variable
$ export variable...