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Articles on Trending Technologies
Technical articles with clear explanations and examples
C Program for Minimum Cost Path
The minimum cost path problem involves finding the path from the top-left corner to the bottom-right corner of a 2D matrix with minimum total cost. You can only move right or down from any given cell. Dynamic programming provides an efficient solution to this problem. Syntax int minCostPath(int cost[][COLS], int m, int n); Problem Approach The solution uses dynamic programming to build a table where each cell contains the minimum cost to reach that position from the starting point (0, 0). The formula for any cell (i, j) is − dp[i][j] = ...
Read MoreAdd space inside a form's text field with CSS
To add space inside a form's text field, use the CSS padding property. This creates internal spacing between the text and the field's border, making the input more visually appealing and easier to read. Syntax input[type="text"] { padding: value; } Example: Adding Space Inside Text Fields The following example demonstrates how to add internal spacing to text input fields − input[type="text"] { width: 100%; ...
Read MoreSelects all elements with rel="nofollow" with CSS
The CSS attribute selector [attribute="value"] allows you to select elements that have a specific attribute with an exact value. This is particularly useful for targeting links with rel="nofollow" attributes. Syntax selector[attribute="value"] { property: value; } Example The following example demonstrates how to select and style all anchor elements with rel="nofollow" − a[rel="nofollow"] { border: 3px solid blue; background-color: #f0f8ff; ...
Read MoreProblem with scanf() when there is fgets()/gets()/scanf() after it in C
In C programming, a common issue occurs when using scanf() followed by fgets(), gets(), or another scanf() for character input. The problem arises because scanf() leaves a newline character in the input buffer, which interferes with subsequent input functions. Syntax scanf("format_specifier", &variable); fgets(string, size, stdin); Problem 1: scanf() Followed by fgets() When scanf() reads an integer and is followed by fgets(), the newline character left by scanf() is immediately consumed by fgets() − #include int main() { int x; char str[100]; ...
Read MoreWith CSS set the element to retain the style values that is set by the first keyframe
The CSS animation-fill-mode property with the backwards value makes an element retain the style values defined in the first keyframe (the from or 0% state) before the animation begins. This is particularly useful when you want the element to appear in its starting animation state during any animation delay. Syntax selector { animation-fill-mode: backwards; } Example The following example demonstrates how animation-fill-mode: backwards applies the first keyframe styles before the animation starts − .box { ...
Read MoreProcess Synchronization in C/C++
Process synchronization is the technique to overcome the problem of concurrent access to shared data which can result in data inconsistency. A cooperating process is the one which can affect or be affected by other process which will lead to inconsistency in processes data therefore Process synchronization is required for consistency of data. Syntax /* General structure for process synchronization */ do { entry_section(); critical_section(); exit_section(); remainder_section(); } while(1); The Critical-Section Problem Every process has a reserved segment ...
Read MoreSet bottom tooltip with CSS
To create a bottom tooltip with CSS, use the top property set to 100% along with position: absolute. This positions the tooltip below the trigger element when hovered. Syntax .tooltip .tooltip-text { position: absolute; top: 100%; visibility: hidden; } .tooltip:hover .tooltip-text { visibility: visible; } Example The following example creates a bottom tooltip that appears when you hover over the text − .mytooltip { ...
Read MoreUsage of CSS [attribute] Selector
The CSS [attribute] selector is used to select elements that contain a specific attribute, regardless of the attribute's value. This is useful for styling elements based on the presence of attributes like alt, target, title, or any custom attributes. Syntax [attribute] { /* CSS properties */ } Example: Selecting Images with Alt Attributes The following example applies a border to all images that have an alt attribute − img[alt] { border: 3px ...
Read MoreSet left tooltip with CSS
To set left tooltip, use the right CSS property. A left tooltip appears to the left of the trigger element when hovering, creating an interactive user interface element. Syntax .tooltip .tooltip-text { position: absolute; right: 100%; } Key Properties PropertyPurpose position: absolutePositions tooltip relative to parent right: 100%Places tooltip to the left of parent element visibility: hidden/visibleControls tooltip display on hover Example The following example creates a left tooltip that appears when hovering over the text − ...
Read MorePrinting source of a C program itself
In C programming, a self-printing program (also called a quine) is a program that prints its own source code as output. This can be achieved using the __FILE__ macro along with file I/O operations to read and display the current source file. Syntax FILE *fopen(__FILE__, "r"); The __FILE__ macro is a preprocessor macro that returns the name of the current source file as a string literal. This allows us to open and read our own source code at runtime. Example: Understanding __FILE__ Macro First, let's see how the __FILE__ macro works − ...
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