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Convert a JSON string to object in Java ME?
...ct)new JSONParser().parse("{\"name\":\"MyNode\", \"width\":200, \"height\":100}");
System.out.println("name=" + json.get("name"));
System.out.println("width=" + json.get("width"));
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pandas: filter rows of DataFrame with operator chaining
...ort numpy as np
import pandas as pd
df = pd.DataFrame(np.random.randint(0,100,size=(100, 4)), columns=list('ABCD'))
df.loc[lambda df: df.A == 80] # equivalent to df[df.A == 80] but chainable
df.sort_values('A').loc[lambda df: df.A > 80].loc[lambda df: df.B > df.A]
If all you're doing is f...
How do I extract a sub-hash from a hash?
...
Ruby 2.5 added Hash#slice:
h = { a: 100, b: 200, c: 300 }
h.slice(:a) #=> {:a=>100}
h.slice(:b, :c, :d) #=> {:b=>200, :c=>300}
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Custom circle button
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android:id="@+id/ok_button"
android:layout_width="100dp"
android:layout_height="100dp"
android:foreground="?attr/selectableItemBackgroundBorderless"
android:background="@drawable/circle_button">
<android.support.const...
How do you change the width and height of Twitter Bootstrap's tooltips?
...hat size on up. This is what I recommend:
.tooltip-inner {
min-width: 100px;
max-width: 100%;
}
The min-width declares a starting size. As opposed to the max-width, as some other would suggest, which it declares a stopping width. According to your question, you shouldn't declare a final ...
Why em instead of px?
...implest zoom method: scaling the entire page. But it means at 150% zoom, a 1000px wide page becomes 1500px wide. It's the easiest way to zoom for web & browser developers. Unfortunately, it's not very user-friendly. Which is why other browsers have text-zooming that magnifies the content only wi...
Hidden features of Android development?
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+100
Hopefully there aren't too many hidden, hidden features - but here's some of the less well known and non-intuitive features availabl...
Delete with Join in MySQL
...n a row, it is going to run that query inside IN. That means, if there are 100 rows that needs to be checked against that WHERE, that subquery is going to be run 100 times. Whereas a JOIN will only run ONCE. So, as your db gets bigger and bigger, that query is going to take longer and longer to fini...
How to avoid soft keyboard pushing up my layout? [duplicate]
...tRootView().getHeight() - (r.bottom - r.top);
if (heightDiff > 100) { // if more than 100 pixels, its probably a keyboard...
//ok now we know the keyboard is up...
view_one.setVisibility(View.GONE);
view_two.setVisibility(View.GONE);
} else {
...
How might I find the largest number contained in a JavaScript array?
...ss you're talking millions of indices.
Average results of five runs with a 100,000-index array of random numbers:
reduce took 4.0392 ms to run
Math.max.apply took 3.3742 ms to run
sorting and getting the 0th value took 67.4724 ms to run
Math.max within reduce() took 6.5804 ms to run
custom findmax ...