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Is it possible only to declare a variable without assigning any value in Python?
...ng* with value here
#we can just start using it right inside the loop
for index in sequence:
if conditionMet:
value = index
break
try:
doSomething(value)
except NameError:
print "Didn't find anything"
It's a little difficult to tell if that's really the right style to us...
How to check if a map contains a key in Go?
...ap entry to true to put the value in the set, and then
test it by simple indexing.
attended := map[string]bool{
"Ann": true,
"Joe": true,
...
}
if attended[person] { // will be false if person is not in the map
fmt.Println(person, "was at the meeting")
}
Sometimes you need ...
What to do Regular expression pattern doesn't match anywhere in string?
... | id
| lang
| style
| tab index
| title
| xml:lang
)
(?<event_attribute>
on blur
| on change
| on click
| on dbl click
...
Most efficient way to create a zero filled JavaScript array?
...(e.g. map or forEach) the values must be set, otherwise it will skip those indexes. The values you set can be whatever you want – even undefined. Example: try new Array(5).forEach(val => console.log('hi')); vs new Array(5).fill(undefined).forEach(val => console.log('hi'));.
...
Open a URL in a new tab (and not a new window)
...Question : I set url without protocol ( for example my.site.com/Controller/Index). As result i get new window (tab) by url such as url of current page (from where i use function OpenInNewTab) plus passed into function url. With protocol window opens by correct link. Why?
– user...
How to see if an NSString starts with a certain other string?
...
I like to use this method:
if ([[temp substringToIndex:4] isEqualToString:@"http"]) {
//starts with http
}
or even easier:
if ([temp hasPrefix:@"http"]) {
//do your stuff
}
share
...
Show spinner GIF during an $http request in AngularJS?
...on:absolute;
top:0;
left:0;
width:100%;
height:100%;
z-index:1000;
background-color:grey;
opacity: .8;
}
.ajax-loader {
position: absolute;
left: 50%;
top: 50%;
margin-left: -32px; /* -1 * image width / 2 */
margin-top: -32px; /* -1 * image height /...
Evil Mode best practice? [closed]
...
all this is great, I added some in wikemacs: wikemacs.org/index.php/Evil#Configuration
– Ehvince
Aug 8 '13 at 9:16
...
How to use Elasticsearch with MongoDB?
...hrough many blogs and sites about configuring Elasticsearch for MongoDB to index Collections in MongoDB but none of them were straightforward.
...
Deploy a project using Git push
... wc_dirty=1
desc="working copy"
fi
if git diff-index --cached HEAD@{1} >/dev/null
then
index_dirty=0
else
echo "W:uncommitted, staged changes found" >&2
index_dirty=1
if [ -n "$desc" ]
...